First LIGO search for gravitational wave bursts from cosmic (super)strings (2009)
Abbott, B. P., Abbott, R., Adhikari, R., Ajith, P., Allen, B., Allen, G., ...
We report on a matched-filter search for gravitational wave bursts from cosmic string cusps using LIGO data from the fourth science run (S4) which took place in February and March 2005. No...
Searches for gravitational waves from known pulsars with S5 LIGO data (2009)
Collaboration, The LIGO Scientific, Abbott, R., Acernese, F., Adhikari, R., Ajith, P., ...
We present a search for gravitational waves from 116 known millisecond and young pulsars using data from the fifth science run of the LIGO detectors. For this search ephemerides overlapping the run...
Search for gravitational wave ringdowns from perturbed black holes in LIGO S4 data (2009)
Abbott, B. P., Abbott, R., Adhikari, R., Ajith, P., Allen, B., Allen, G., ...
According to general relativity a perturbed black hole will settle to a stationary configuration by the emission of gravitational radiation. Such a perturbation will occur, for example, in the...
Collaboration, LIGO Scientific, Abbott, R., Acernese, F., Adhikari, R., Ajith, P., ...
We present the results of a search for gravitational-wave bursts associated with 137 gamma-ray bursts (GRBs) that were detected by satellite-based gamma-ray experiments during the fifth LIGO science...
Stacked Search for Gravitational Waves from the 2006 SGR 1900+14 Storm (2009)
Abbott, B. P., Abbott, R., Adhikari, R., Ajith, P., Allen, B., Allen, G., ...
We present the results of a LIGO search for short-duration gravitational waves (GWs) associated with the 2006 March 29 SGR 1900+14 storm. A new search method is used, "stacking" the GW data around...
Abbott, B. P., Abbott, R., Adhikari, R., Ajith , P., Allen, B., Allen, G., ...
We report on a search for gravitational waves from coalescing compact binaries, of total mass between 2 and 35M_☉, using LIGO observations between November 14, 2006 and May 18, 2007. No...
Einstein@Home search for periodic gravitational waves in early S5 LIGO data (2009)
Abbott, B. P., Abbott, R., Adhikari, R., Ajith, P., Allen, B., Allen, G., ...
This paper reports on an all-sky search for periodic gravitational waves from sources such as deformed isolated rapidly spinning neutron stars. The analysis uses 840 hours of data from 66 days of the...
Observation of a kilogram-scale oscillator near its quantum ground state (2009)
Abbott, B., Abbott, R., Adhikari, R., Ajith, P., Allen , B., Allen, G., ...
We introduce a novel cooling technique capable of approaching the quantum ground state of a kilogram-scale system—an interferometric gravitational wave detector. The detectors of the Laser...
LIGO: the Laser Interferometer Gravitational-Wave Observatory (2009)
Abbott, B. P., Abbott, R., Adhikari, R., Ajith, P, Allen, B., Allen, G., ...
The goal of the Laser Interferometric Gravitational-Wave Observatory (LIGO) is to detect and study gravitational waves (GWs) of astrophysical origin. Direct detection of GWs holds the promise of...
All-Sky LIGO Search for Periodic Gravitational Waves in the Early Fifth-Science-Run Data (2009)
Abbott, B. P., Abbott, R., Adhikari, R., Ajith, P., Allen, B., Allen, G., ...
We report on an all-sky search with the LIGO detectors for periodic gravitational waves in the frequency range 50–1100 Hz and with the frequency’s time derivative in the range -5 x 10^(-9)–0...
Hallam, J., Chelkowski, S., Freise, A., Hild, S., Barr, B., Strain, K. A., ...
Diffraction gratings have been proposed as core elements in future laser-interferometric gravitational-wave detectors. In this paper, we use a steady-state technique to derive coupling of lateral...
Surprising result after evaluating a nurse-driven guideline on blood glucose management (2009)
Schnabel, R, Zwaveling, J, Bergmans, D
No abstract available.
Einstein@Home search for periodic gravitational waves in LIGO S4 data (2009)
Abbott, B., Abbott, R., Adhikari, R., Ajith, P, Allen, B., Allen, G., ...
A search for periodic gravitational waves, from sources such as isolated rapidly spinning neutron stars, was carried out using 510 h of data from the fourth LIGO science run (S4). The search was for...
Demonstration of a cavity coupler based on a resonant waveguide grating (2009)
Brückner, F., Friedrich, D., Clausnitzer, T., Burmeister, O., Britzger, M., ...
Thermal noise in multilayer optical coatings may not only limit the sensitivity of future gravitational wave detectors in their most sensitive frequency band but is also a major impediment for...
All-sky LIGO search for periodic gravitational waves in the early fifth-science-run data. (2009)
Abbott, B. P., Abbott, R., Adhikari, R., Ajith, P., Allen, B., Allen, G., ...
We report on an all-sky search with the LIGO detectors for periodic gravitational waves in the frequency range 50-1100 Hz and with the frequency's time derivative in the range -5 x 10{-9}-0 Hz s{-1}....
An upper limit on the stochastic gravitational-wave background of cosmological origin (2009)
Abbott, B. P., Abbott, R., Acernese, F., Adhikari, R., Ajith, P., Allen, B., ...
A stochastic background of gravitational waves is expected to arise from a superposition of a large number of unresolved gravitational-wave sources of astrophysical and cosmological origin. It should...
LIGO: the Laser Interferometer Gravitational-Wave Observatory (2009)
Abbott, B. P., Abbott, R., Adhikari, R., Ajith, P., Allen, B., Allen, G., ...
The goal of the Laser Interferometric Gravitational-Wave Observatory (LIGO) is to detect and study gravitational waves (GWs) of astrophysical origin. Direct detection of GWs holds the promise of...
Observation of a kilogram-scale oscillator near its quantum ground state (2009)
Abbott, B., Abbott, R., Adhikari, R., Ajith, P., Allen, B., Allen, G., ...
We introduce a novel cooling technique capable of approaching the quantum ground state of a kilogram-scale system-an interferometric gravitational wave detector. The detectors of the Laser...
Abbott, B. P., Abbott, R., Adhikari, R., Ajith, P., Allen, B., Allen, G., ...
We have searched for gravitational waves from coalescing low mass compact binary systems with a total mass between 2M(circle dot) and 35M(circle dot) and a minimum component mass of 1M(circle dot)...
Stacked Search for Gravitational Waves from the 2006 SGR 1900+14 Storm (2009)
Abbott, B. P., Abbott, R., Adhikari, R., Ajith, P., Allen, B., Allen, G., ...
We present the results of a LIGO search for short-duration gravitational waves (GWs) associated with the 2006 March 29 SGR 1900+14 storm. A new search method is used, "stacking" the GW data around...
Abbott, B. P., Abbott, R., Adhikari, R., Ajith, P., Allen, B., Allen, G., ...
We have searched for gravitational waves from coalescing low mass compact binary systems with a total mass between 2M/sub o/ and 35M/sub o/ and a minimum component mass of 1M/sub o/ using data from...
Abbott, B. P., Abbott, R., Adhikari, R., Ajith, P., Allen, B., Allen, G., ...
We have searched for gravitational waves from coalescing low mass compact binary systems with a total mass between 2M_([sun]) and 35Mz-([sun]) and a minimum component mass of 1M_([sun]) using data...
Einstein@Home search for periodic gravitational waves in early S5 LIGO data (2009)
LIGO Sci Collaboration, Abbott, BP, Abbott, R, Adhikari, R, Ajith, P, Allen, B, ...
First joint search for gravitational-wave bursts in LIGO and GEO 600 data (2008)
Abbott, B., Abbott, R., Adhikari, R., Ajith, P., Allen, B., Allen, G., ...
We present the results of the first joint search for gravitational-wave bursts by the LIGO and GEO 600 detectors. We search for bursts with characteristic central frequencies in the band 768-2048 Hz...
Experimental test of nonclassicality criteria (2008)
Kiesel, T., Vogel, W., Hage, B., DiGuglielmo, J., Samblowski, A., Schnabel, R.
We experimentally examine the nonclassical character of a class of non-Gaussian states known as phase-diffused squeezed states. These states may show no squeezing effect at all, and therefore provide...
Search for Gravitational-Wave Bursts from Soft Gamma Repeaters (2008)
Abbott, B., Abbott, R., Adhikari, R., Ajith, P., Allen, B., Allen, G., ...
We present a LIGO search for short-duration gravitational waves (GWs) associated with soft gamma ray repeater (SGR) bursts. This is the first search sensitive to neutron star f modes, usually...
Beating the spin-down limit on gravitational wave emission from the Crab pulsar (2008)
Abbott, B., Abbott, R., Adhikari, R., Ajith, P., Allen, B., Allen, G., ...
We present direct upper limits on gravitational wave emission from the Crab pulsar using data from the first 9 months of the fifth science run of the Laser Interferometer Gravitational-wave...
Implications for the origin of GRB 070201 from LIGO observations (2008)
Abbott, B., Abbott, R., Adhikari, R., Agresti, J., Ajith, P., Allen, B., ...
We analyzed the available LIGO data coincident with GRB 070201, a short-duration, hard-spectrum gamma-ray burst (GRB) whose electromagnetically determined sky position is coincident with the spiral...
Implications for the origin of GRB 070201 from LIGO observations (2008)
Abbott, B., Abbott, R., Adhikari, R., Agresti, J., Ajith, P., Allen, B., ...
We analyzed the available LIGO data coincident with GRB 070201, a short-duration, hard-spectrum γ-ray burst (GRB) whose electromagnetically determined sky position is coincident with the spiral arms...
Astrophysically triggered searches for gravitational waves: status and prospects (2008)
Abbott, B., Abbott, R., Adhikari, R., Ajith, P., Allen, B., Allen, G., ...
In gravitational-wave detection, special emphasis is put onto searches that focus on cosmic events detected by other types of astrophysical observatories. The astrophysical triggers, e. g. from...
Astrophysically triggered searches for gravitational waves: status and prospects (2008)
Abbott, B., Abbott, R., Adhikari, R., Ajith, P., Allen, B., Allen, G., ...
In gravitational-wave detection, special emphasis is put onto searches that focus on cosmic events detected by other types of astrophysical observatories. The astrophysical triggers, e.g. from γ-ray...
A joint search for gravitational wave bursts with AURIGA and LIGO (2008)
Baggio, L., Bignotto, M., Bonaldi, M., Cerdonio, M., De Rosa, M., Falferi, P., ...
The first simultaneous operation of the AURIGA detector and the LIGO observatory was an opportunity to explore real data, joint analysis methods between two very different types of gravitational wave...
Learning by geometrical shape changes of dendritic spines (2008)
A. Herzog, V. Spravedlyvyy, K. Kube, R. Schnabel, E. Korkotian, K. Braun, ...
Abstract. The role of dendritic spines in neuronal information processing is still not completely clear. However, it is known that spines can change shape rapidly during development and during...
Eurographics Symposium on Geometry Processing (2005) (2008)
M. Desbrun, H. Pottmann (editors, G. H. Bendels, R. Schnabel, R. Klein
Inpainting is a well-known technique in the context of image and art restoration, where paint losses are filled up to the level of the surrounding paint and then coloured to match. Analogue tasks can...
M. Mudge, N. Ryan, R. Scopigno (editors, G. H. Bendels, R. Schnabel, ...
Max Planck model with missing data. The hole is inpainted by copying appropriate fragments of other parts of the object to the hole region. Inpainting is a well-known technique in the context of...
Monolithic dielectric surfaces as new low-loss light-matter interfaces (2008)
Brückner, F., Clausnitzer, T., Burmeister, O., Friedrich, D., Danzmann, K., ...
We propose a new mirror architecture, which is solely based upon structuring of the surface of a monolithic, possibly monocrystalline, bulk material. We found that a structure of T-shaped ridges of a...
Diffractive beam splitter characterization via a power-recycled interferometer (2008)
Friedrich, D., Burmeister, O., Bunkowski, A., Clausnitzer, T., Fahr, S., ...
We used the high-precision laser interferometer technique of power recycling to characterize the optical loss of an all-reflective grating beam splitter. This beam splitter was used to set up a...
Power-recycled Michelson interferometer with a 50/50 grating beam splitter (2008)
Friedrich, D., Burmeister, O., Britzger, M., Bunkowski, A., Clausnitzer, T., Fahr, S., ...
We designed and fabricated an all-reflective 50/50 beam splitter based on a dielectric grating. This beam splitter was used to set up a power-recycled Michelson interferometer with a finesse of about...
Abbott, B., Abbott, R., Adhikari, R., Agresti, J., Ajith, P., Allen, B., ...
We report in the methods and results of the first dedicated search for gravitational waves emitted during the inspiral of compact binaries with spinning component bodies. We analyze 788 hours of data...
A joint search for gravitational wave bursts with AURIGA and LIGO (2008)
Baggio, L., Bignotto, M., Bonaldi, M., Cerdonio, M., De Rosa, M., Falferi, P., ...
The first simultaneous operation of the AURIGA detector(63) and the LIGO observatory(64) was an opportunity to explore real data, joint analysis methods between two very different types of...
A joint search for gravitational wave bursts with AURIGA and LIGO (2008)
Baggio, L, Bignotto, M, Bonaldi, M, Cerdonio, M, Rosa, M De, Falferi, P, ...
"The first simultaneous operation of the AURIGA detector and the LIGO observatory was an opportunity to explore real data, joint analysis methods between two very different types of gravitational...
Astrophysically triggered searches for gravitational waves: status and prospects (2008)
Abbott, B, Abbott, R, Adhikari, R, Ajith, P, Allen, B, Allen, G, ...
"In gravitational-wave detection, special emphasis is put onto searches that focus on cosmic events detected by other types of astrophysical observatories. The astrophysical triggers, e.g. from g-ray...
First joint search for gravitational-wave bursts in LIGO and GEO 600 data (2008)
Abbott, B, Abbott, R, Adhikari, R, Ajith, P, Allen, B, Allen, G, ...
"We present the results of the first joint search for gravitational-wave bursts by the LIGO and GEO 600 detectors. We search for bursts with characteristic central frequencies in the band 768-2048 Hz...
Search for gravitational-wave bursts in LIGO data from the fourth science run (2007)
Abbott, B, Abbott, R, Adhikari, R, Agresti, J, Ajith, P, Allen, B, ...
The fourth science run of the LIGO and GEO 600 gravitational-wave detectors, carried out in early 2005, collected data with significantly lower noise than previous science runs. We report on a search...
Intra-firm Wage Dispersion and Firm Performance (2007)
Rudolf Winter-ebmer, Josef Zweimüller, S. Raphael, R. Schnabel, L. Ulman
Personnel economics has put forward conflicting arguments concerning the impact of increased wage dispersion within a firm on the productivity of its workers. Besides giving more incentives, bigger...
Phase and alignment noise in grating interferometers (2007)
Freise, A., Bunkowski, A., Schnabel, R.
Diffraction gratings have been proposed as core optical elements in future laser-interferometric gravitational-wave detectors. In this paper we derive equations for the coupling between alignment...
Diffractive Optics for Gravitational Wave Detectors (2007)
Bunkowski, A., Burmeister, O., Danzmann, K., Schnabel, R., Clausnitzer, T., ...
All-reflective interferometry based on nano-structured diffraction gratings offers new possibilities for gravitational wave detection. We investigate an all-reflective Fabry-Perot interferometer...
Joint LIGO and TAMA300 search for gravitational waves from inspiralling neutron star binaries (2006)
Abbott, B., Abbott, R., Adhikari, R., Ageev, A., Agresti, J., Ajith, P., ...
We search for coincident gravitational wave signals from inspiralling neutron star binaries using LIGO and TAMA300 data taken during early 2003. Using a simple trigger exchange method, we perform an...
Search for gravitational waves from binary black hole inspirals in LIGO data (2006)
Abbott, B., Abbott, R., Adhikari, R., Ageev, A., Agresti, J, Ajith, P., ...
We report on a search for gravitational waves from binary black hole inspirals in the data from the second science run of the LIGO interferometers. The search focused on binary systems with component...
Optical characterization of ultrahigh diffraction efficiency gratings (2006)
Bunkowski, A., Burmeister, O., Clausnitzer, T., Tünnermann, A., Danzmann, K., ...
We report on the optical characterization of an ultrahigh diffraction efficiency grating in a first-order Littrow configuration. The apparatus used was an optical cavity built from the grating under...
Status of the LIGO detectors (2006)
Abbott, B., Abbott, R., Adhikari, R., Agresti, J., Ajith, P., Allen, B., ...
Copyright © Institute of Physics and IOP Publishing Limited 2006.
Status of the LIGO detectors (2006)
Abbott, B., Abbott, R., Adhikari, R., Agresti, J., Ajith, P., Allen, B., ...
Copyright © Institute of Physics and IOP Publishing Limited 2006.
Upper limits from the LIGO and TAMA detectors on the rate of gravitational-wave bursts (2005)
Abbott, B., Abbott, R., Adhikari, R., Ageev, A., Agresti, J., Ajith, P., ...
We report on the first joint search for gravitational waves by the TAMA and LIGO collaborations. We looked for millisecond-duration unmodeled gravitational-wave bursts in 473 hr of coincident data...
Abbott, B., Abbott, R., Adhikari, R., Ageev, A., Allen, B., Amin, R., ...
We use data from the second science run of the LIGO gravitational-wave detectors to search for the gravitational waves from primordial black hole binary coalescence with component masses in the range...
Search for gravitational waves from galactic and extra-galactic binary neutron stars (2005)
Abbott, B., Abbott, R., Adhikari, R., Ageev, A., Allen, B., Amin, R., ...
We use 373 hours (≈15 days) of data from the second science run of the LIGO gravitational-wave detectors to search for signals from binary neutron star coalescences within a maximum distance of...
Search for gravitational waves from galactic and extra-galactic binary neutron stars (2005)
Abbott, B., Abbott, R., Adhikari, R., Ageev, A., Allen, B., Amin, R., ...
We use 373 hours (≈15 days) of data from the second science run of the LIGO gravitational-wave detectors to search for signals from binary neutron star coalescences within a maximum distance of...
Upper limits on gravitational wave bursts in LIGO's second science run (2005)
Abbott, B., Abbott, R., Adhikari, R., Ageev, A., Agresti, J., Allen, B., ...
We perform a search for gravitational wave bursts using data from the second science run of the LIGO detectors, using a method based on a wavelet time-frequency decomposition. This search is...
Grote, H., Allen, B., Aufmuth, P., Aulbert, C., Babak, S., Balasubramanian, R., ...
Since December 2003, the gravitational-wave detector GEO 600 has routinely operated in the dual recycled mode, using a lock acquisition scheme based on the detection of optical sideband power at the...
Strain, K.A., Allen, B., Aufmuth, P., Aulbert, C., Babak, S., Balasubramanian, R., ...
The GEO 600 laser interferometer with 600m armlength is part of a worldwide network of gravitational wave detectors. GEO 600 is unique in having advanced multiple pendulum suspensions with a...
Willke, B., Aufmuth, P., Aulbert, C., Babak, S., Balasubramanian, R., Barr, B., ...
The GEO 600 laser interferometer with 600 m armlength is currently being commissioned as a part of a worldwide network of gravitational wave detectors. Due to the use of advanced technologies such as...
Centriolar SAS-5 is required for centrosome duplication in C. elegans (2004)
Delattre, M., Leidel, S., Wani, K., Baumer, K., Bamat, J., Schnabel, H., ...
Centrosomes, the major microtubule-organizing centres (MTOCs) of animal cells, are comprised of a pair of centrioles surrounded by pericentriolar material (PCM). Early in the cell cycle, there is a...
Commissioning, characterization and operation of the dual- recycled GEO 600 (2004)
Smith, J.R., Allen, B., Aufmuth, P., Aulbert, C., Babak, S., Balasubramanian, R., ...
The German-British laser-interferometric gravitational-wave detector GEO 600 is currently being commissioned as part of a worldwide network of gravitational-wave detectors. GEO 600 recently became...
Squeezed light for the interferometric detection of high- frequency gravitational waves (2004)
Schnabel, R., Harms, J., Strain, K.A., Danzmann, K.
The quantum noise of the light field is a fundamental noise source in interferometric gravitational-wave detectors. Injected squeezed light is capable of reducing the quantum noise contribution to...
Squeezed light for the interferometric detection of high-frequency gravitational waves (2004)
Schnabel, R., Harms, J., Strain, K.A., Danzmann, K.
The quantum noise of the light field is a fundamental noise source in interferometric gravitational-wave detectors. Injected squeezed light is capable of reducing the quantum noise contribution to...
Experimental characterization of continuous-variable entanglement (2004)
Bowen, W. P., Schnabel, R., Lam, P. K., Ralph, T. C.
We present an experimental analysis of quadrature entanglement produced from a pair of amplitude squeezed beams. The correlation matrix of the state is characterized within a set of reasonable...
Squeezed light at sideband frequencies below 100 kHz from a single OPA (2004)
Schnabel, R., Vahlbruch, H., Franzen, A., Chelkowski, S., Grosse, N. B., ...
Quantum noise of the electromagnetic field is one of the limiting noise sources in interferometric gravitational wave detectors. Shifting the spectrum of squeezed vacuum states downwards into the...
Photon number diagram for characterizing continuous variable entanglement. , pp. 315-323 (2004)
Bowen, W. P., Hsu, M. T. L., Symul, T., Lance, A. M., Buchler, B. C., Schnabel, R., ...
The quantum laser pointer and other applications of squeezed light (2004)
Bowen, W. P., Grosse, N., Buchler, B. C., Andersen, U., Schnabel, R., ...
A Report on the Status of the GEO 600 Gravitational Wave Detector (2003)
Hewitson, M., Aufmuth, P., Aulbert, C., Babak, S., Balasubramanian, R., Barr, B.W., ...
GEO 600 is an interferometric gravitational wave detector with 600 m arms, which will employ a novel, dual-recycled optical scheme allowing its optical response to be tuned over a range of...
Detector characterization in GEO 600 (2003)
Sintes, A.M., Aufmuth, P., Aulbert, C., Babak, S., Balasubramanian, R., Barr, B.W., ...
The GEO 600 interferometric gravitational wave detector conducted its first science run (S1) from 23 August 2002 to 9 September 2002. The GEO 600 data acquisition system is described together with...
Stokes-operator-squeezed continuous-variable polarization states (2003)
Schnabel, R., Bowen, W. P., Treps, N., Ralph, T. C., Bachor, H. A., Lam, P. K.
We investigate nonclassical Stokes-operator variances in continuous-wave polarization-squeezed laser light generated from one and two optical parametric amplifiers. A general expression of how...
Experimental investigation of criteria for continuous variable entanglement (2003)
Bowen, W. P., Schnabel, R., Lam, P. K., Ralph, T. C.
We generate a pair of entangled beams from the interference of two amplitude squeezed beams. The entanglement is quantified in terms of EPR paradox and inseparability criteria, with both results...
Experimental investigation of continuous-variable quantum teleportation (2003)
Bowen, W. P., Treps, N., Buchler, B. C., Schnabel, R., Ralph, T. C., Bachor, H. A., ...
We report the experimental demonstration of quantum teleportation of the quadrature amplitudes of a light field. Our experiment was stably locked for long periods, and was analyzed in terms of...
Optical experiments beyond the quantum limit: Squeezing entanglement and teleportation (2003)
Schnabel, R., Bowen, W. P., Treps, N., Buchler, B. C., Ralph, T. C., Lam, P. K., ...
Results of experiments recently performed are reported, in which two optical parametric amplifiers were set up to generate two independently quadrature squeezed continuous wave laser beams. The...
Continuous variable polarization entanglement experiment and analysis (2003)
Bowen, W. P., Treps, N., Schnabel, R., Ralph, T. C., Lam, P. K.
We generate and characterize continuous variable polarization entanglement between two optical beams. We first produce quadrature entanglement, and by performing local operations we transform it into...
Unity and non-unity gain quantum teleportation (2003)
Bowen, W. P., Treps, N., Buchler, B. C., Schnabel, R., Ralph, T. C., Symul, T., ...
We investigate continuous variable quantum teleportation. We discuss the methods presently used to characterize teleportation in this regime, and propose an extension of the measures proposed by...
Optical squeezing in temporal, polarization, and spatial domains (2003)
Symul, T., Bowen, W. P., Schnabel, R., Treps, N., Buchler, B. C., Ralph, T. C., ...
We present methods of transforming the standard quadrature amplitude squeezing of a continuous-wave light beam to its Stokes parameters and transverse spatial modes statistics. These two states of...
Von Bardeleben, R. S., Abegunewardene, N., Schnabel, R., Kunz, P., Kreitner, K. F., Mohr-Kahaly, S., ...
Experimental demonstration of continuous variable polarization entanglement (2002)
Bowen, W. P., Treps, N., Schnabel, R., Lam, P. K.
We report the experimental transformation of quadrature entanglement between two optical beams into continuous variable polarization entanglement. We extend the inseparability criterion proposed by...
Polarization squeezing of continuous variable stokes parameters (2002)
Bowen, W. P., Schnabel, R., Lam, P. K.
We report the first direct experimental characterization of continuous variable quantum Stokes parameters. We generate a continuous wave light beam with more than 3 dB of simultaneous squeezing in...
Experimental demonstration of continuous variable polarization entanglement (2002)
Bowen, W. P., Treps, N., Schnabel, R., Lam, P. K.
We report the experimental transformation of quadrature entanglement between two optical beams into continuous variable polarization entanglement. We extend the inseparability criterion proposed by...
Polarization squeezing of continuous variable stokes parameters (2002)
Bowen, W. P., Schnabel, R., Lam, P. K.
We report the first direct experimental characterization of continuous variable quantum Stokes parameters. We generate a continuous wave light beam with more than 3 dB of simultaneous squeezing in...
Recovery of continuous wave squeezing at low frequencies (2002)
Bowen, W. P., Schnabel, R., Treps, N., Lam, P. K.
We propose and demonstrate a system that produces squeezed vacuum using a pair of optical parametric amplifiers (OPAs). This scheme allows the production of phase sidebands on the squeezed vacuum...
Optical quantum information processing: experiments with CW laser light (2001)
Bachor, Hans-A., Lam, P. K., Bowen, W. P., Schnabel, R., Bennetts, S., Buchler, B. C., ...
Jantsch-Plunger, V., Gönczy, P., Romano, A., Schnabel, H., Hamill, D., Schnabel, R., ...
During cytokinesis of animal cells, the mitotic spindle plays at least two roles. Initially, the spindle positions the contractile ring. Subsequently, the central spindle, which is composed of...
Pichler, S., Gönczy, P., Schnabel, H., Pozniakowski, A., Ashford, A., Schnabel, R., ...
Asymmetric cell divisions require the establishment of an axis of polarity, which is subsequently communicated to downstream events. During the asymmetric cell division of the P(1) blastomere in C....
Gönczy, P., Schnabel, H., Kaletta, T., Amores, A. D., Hyman, T., Schnabel, R.
To identify novel components required for cell division processes in complex eukaryotes, we have undertaken an extensive mutational analysis in the one cell stage Caenorhabditis elegans embryo. The...
Ludwig, R., Pieper, W., Schnabel, R., Diez, S., Weber, H.G.
Four-wave mixing in semiconductor laser amplifiers enables various applications in photonic switching including wavelength conversion, space and time switching, optical phase conjugation, and...
Ultrafast optical signal processing using semiconductor laser amplifiers (1996)
Schnabel, R., Ludwig, R., Pieper, W., Diez, S., Weber, H.G.
Optical fibres exhibit a bandwidth of about 50 THz, which enables data transmission in excess of 100 Gbit s-1. This potential for ultrafast optical signal transmission stimulates the research on...
Four-wave mixing and asymmetric nonlinear gain in a semiconductor-laser amplifier (1995)
Ludwig, R., Schnabel, R., Weber, H.G., Wissenfeld, J.
Summary form only given. Four-wave mixing (FWM) in semiconductor laser amplifiers (SLA) has been studied extensively in recent years. In the present paper, we report on measurements with beat...
Pieper, W., Kurtzke, C., Schnabel, R., Breuer, D., Ludwig, R., Weber, H.G., ...
Optical-phase conjugation in a semiconductor-laser amplifier has the potential to compensate for the interplay of chromatic dispersion and nonlinear self-phase modulation, thereby enabling...
Schnabel, R., Hilbk, U., Hermes, T., Meissner, P., Helmolt, C. Von, Magari, K., ...
A ten-channel OFDM signal with a channel spacing of 9 GHz and a modulation rate of 140 Mb/s per channel was frequency converted over 275 GHz. BER measurements revealed no severe system degradation...
Schnabel, R., Pieper, W., Ludwig, R., Weber, H.G.
A purely optical AND gate is demonstrated using femtosecond nonlinear gain dynamics induced four-wave mixing in semiconductor laser amplifiers with two pulse streams. The potential of a femtosecond...
Schnabel, R., Pieper, W., Ehrhardt, M., Eiselt, M., Weber, H.G.
Nonlinear gain dynamics in semiconductor laser amplifiers enables ultrafast signal processing. Wavelength conversion of up to 18 Gbit/s data signals is demonstrated. The switching characteristics are...
Schnabel, R., Pieper, W., Ludwig, R., Weber, H.G.
The femtosecond nonlinear gain dynamics in semiconductor laser amplifiers were used for the 3.8 THz frequency conversion of 30 ps pulses by four-wave mixing. The experiments demonstrate that the...
Semiconductor laser amplifiers as all-optical frequency converters (1991)
Schunk, N., Grosskopf, G., Ludwig, R., Schnabel, R., Weber, H.G.
All-optical frequency conversion of an optical data signal can be achieved by a traveling-wave semiconductor laser amplifier over a spectral range given by its entire gain spectrum (>or=10 THz)....
Optical signal processing using semiconductor laser amplifiers (1991)
Weber, H.G., Grosskopf, G., Ludwig, R., Patzak, E., Schnabel, R.
SLAs can be used in the linear, nonlinear or optoelectronic mode of operation. The combination of these different operation conditions provides various optical functional devices: all-optical...
Frequency conversion by four-wave-mixing in LD amplifiers (1990)
Grosskopf, G., Ludwig, R., Schnabel, R., Schunk, N., Weber, H.G.
Nearly-degenerate four-wave-mixing in traveling wave laser diode amplifiers enables all-optical frequency conversion of an optical data signal. The frequency conversion range is limited by the gain...
Optical travelling wave amplifiers with multi-section semiconductor-laser structures (1990)
Ludwig, R., Moehrle, M., Rosenzweig, M., Schnabel, R., Schunk, N., Weber, H.G.
Optical travelling wave amplifiers based on multi-section semiconductor laser structures are better adjustable to various applications than conventional single-section devices. The authors present...
Semiconductor laser optical amplifiers in switching and distribution networks (1989)
Grosskopf, G., Kuller, L., Ludwig, R., Schnabel, R., Weber, H.G.
Applications of semiconductor laser optical amplifiers in coherent multichannel systems are investigated with respect to the switching and distribution of many channels to a large number of...
THE EVOLUTION OF THE TRANSCRIPTION APPARATUS (1985)
Zillig, W., Schnabel, R., Thomm, Michael, Gropp, F., Reiter, W. D.
DNA-Dependent RNA Polymerases of the Archaebacteria (1985)
Zillig, W., Stetter, Karl Otto, Schnabel, R., Thomm, Michael
PHYLOGENY OF THE ARCHAEBACTERIA AND EUKARYOTES: HOMOLOGY OF THE DNA-DEPENDENT RNA POLYMERASES (1983)
Schnabel, R., Huet, J., Thomm, Michael, Zillig, W., Sentenac, A., Stetter, Karl Otto
Schnabel, R., Thomm, Michael, Gerardy-Schahn, R., Zillig, W., Stetter, Karl Otto, Huet, J.
The archaebacterial DNA-dependent RNA polymerases have a complex structure containing eight or more components. Immunochemical analysis shows an extensive homology between the components of the...