Quantum Metrology with Two-Mode Squeezed Vacuum: Parity Detection Beats the Heisenberg Limit (2009)
Anisimov, Petr M., Raterman, Gretchen M., Chiruvelli, Aravind, Plick, William N., Huver, Sean D., Lee, Hwang, ...
We study the sensitivity and resolution of phase measurement in a Mach-Zehnder interferometer with two-mode squeezed vacuum ( photons on average). We show that super-resolution and sub-Heisenberg...
Optimization of quantum interferometric metrological sensors in the presence of photon loss (2009)
Lee, Tae-Woo, Huver, Sean D., Lee, Hwang, Kaplan, Lev, McCracken, Steven B., Min, Changjun, ...
We optimize two-mode, entangled, number states of light in the presence of loss in order to maximize the extraction of the available phase information in an interferometer. Our approach optimizes...
Optimizing the Multi-Photon Absorption Properties of N00N States (2009)
Plick, William N., Wildfeuer, Christoph F., Anisimov, Petr M., Dowling, Jonathan P.
In this paper we examine the N-photon absorption properties of "N00N" states, a subclass of path entangled number states. We consider two cases. The first involves the N-photon absorption properties...
Gao, Yang, Wildfeuer, Christoph F., Anisimov, Petr M., Lee, Hwang, Dowling, Jonathan P.
There has been much recent interest in quantum optical interferometry for applications to metrology, sub-wavelength imaging, and remote sensing, such as in quantum laser radar (LADAR). For quantum...
Thanvanthri, Sulakshana, Kapale, Kishore T., Dowling, Jonathan P.
Matter-wave interferometers are, in principle, orders of magnitude more sensitive than their optical counterparts. Nevertheless, creation of matter-wave currents to achieve such a sensitivity is a...
Wildfeuer, Christoph F., Pearlman, Aaron J., Chen, Jun, Fan, Jingyun, Migdall, Alan, Dowling, Jonathan P.
With photon-number resolving detectors, we show compression of interference fringes with increasing photon numbers for a Fabry-Perot interferometer. This feature provides a higher precision in...
Quantum Optical Metrology -- The Lowdown on High-N00N States (2009)
Quantum states of light, such as squeezed states or entangled states, can be used to make measurements (metrology), produce images, and sense objects with a precision that far exceeds what is...
A non-degenerate optical parametric oscillator as a high-flux source for quantum lithography (2009)
Cable, Hugo, Vyas, Reeta, Singh, Surendra, Dowling, Jonathan P.
We investigate the use of a non-degenerate parametric oscillator (NDPO) as a source for quantum lithography, for which the light can have high-flux and strong non-classical features. This builds on...
Factoring integers with Young's N-slit interferometer (2008)
Clauser, John F., Dowling, Jonathan P.
We show that a Young's N slit interferometer can be used to factor the integer N. The device could factor four- or five-digit numbers in a practical fashion. This work shows how number theory may...
Maximal Success Probabilities of Linear-Optical Quantum Gates (2008)
Uskov, Dmitry B., Kaplan, Lev, Smith, A. Matthew, Huver, Sean D., Dowling, Jonathan P.
Numerical optimization is used to design linear-optical devices that implement a desired quantum gate with perfect fidelity, while maximizing the success rate. For the 2-qubit CS (or CNOT) gate, we...
Entangled Fock states for Robust Quantum Optical Metrology, Imaging, and Sensing (2008)
Huver, Sean D., Wildfeuer, Christoph F., Dowling, Jonathan P.
We propose a class of path-entangled photon Fock states for robust quantum optical metrology, imaging, and sensing in the presence of loss. We model propagation loss with beam-splitters and derive a...
Glasser, Ryan T., Cable, Hugo, Dowling, Jonathan P., De Martini, Francesco, Sciarrino, Fabio, Vitelli, Chiara
The study of optical parametric amplifiers (OPAs) has been successful in describing and creating nonclassical light for use in fields such as quantum metrology and quantum lithography [Agarwal, et...
Linear Optics and Projective Measurements for Fun and Profit (2008)
Pieter Kok, Hwang Lee, Colin P. Williams, Jonathan P. Dowling
The technique of projective measurements in linear optics can provide apparent, efficient nonlinear interaction between photons, which is technically problematic otherwise. We present an application...
Thanvanthri, Sulakshana, Kapale, Kishore T., Dowling, Jonathan P.
We recently proposed a scheme for the creation of coherent superpositions of vortex states in Bose-Einstein condensates (BEC) using orbital angular momentum (OAM) states of light [Phys. Rev. Lett....
Sciarrino, Fabio, Vitelli, Chiara, De Martini, Francesco, Glasser, Ryan, Cable, Hugo, Dowling, Jonathan P.
Quantum lithography proposes to adopt entangled quantum states in order to increase resolution in interferometry. In the present paper we experimentally demonstrate that the output of a high-gain...
Han, Muxin, Olson, S. Jay, Dowling, Jonathan P.
Building on the well-known Unruh-Davies effect, we examine the effects of projective measurements and quantum communications between accelerated and stationary observers. We find that the projective...
The Classical Lamb Shift: Why Jackson is Wrong! 1 (2007)
I provide here a classical calculation of the Lamb shift that is of the same order of magnitude as the quantum Bethe result. This contradicts Jackson’s claim that a classical calculation can not...
Coherent Communication with Linear Optics (2007)
Wilde, Mark M., Brun, Todd A., Dowling, Jonathan P., Lee, Hwang
We show how to implement several continuous-variable coherent protocols with linear optics. Noise can accumulate when implementing each coherent protocol with realistic optical devices. Our analysis...
Dowling, Jonathan P., Klimeck, Gerhard, Werbos, Paul
The National Science Foundation has identified a new thrust area in Quantum, Molecular and High Performance Modeling and Simulation for Devices and Systems (QMHP) in its core program. The main...
Probability, unitarity, and realism in generally covariant quantum information (2007)
Olson, S. Jay, Dowling, Jonathan P.
The formalism of covariant quantum theory, introduced by Reisenberger and Rovelli, casts the description of quantum states and evolution into a framework compatable with the principles of general...
Strong violations of Bell-type inequalities for Werner-like states (2007)
Wildfeuer, Christoph F., Dowling, Jonathan P.
We investigate the violation of Bell-type inequalities for two-qubit Werner-like states parametrized by the positive parameter 0
Optimizing Optical Quantum Logic Gates using Genetic Algorithms (2007)
Wu, Zhanghan, Huver, Sean D., Uskov, Dmitry, Lee, Hwang, Dowling, Jonathan P.
We introduce the method of using an annealing genetic algorithm to the numerically complex problem of looking for quantum logic gates which simultaneously have highest fidelity and highest success...
Han, Muxin, Olson, S. Jay, Dowling, Jonathan P.
Building on the well-known Unruh-Davies effect, we examine the effects of projective measurements and quantum communications between accelerated and stationary observers. We find that the projective...
Generation of Large Number-Path Entanglement Using Linear Optics and Feed-Forward (2007)
Cable, Hugo, Dowling, Jonathan P.
We show how an idealised measurement procedure can condense photons from two modes into one, and how, by feeding forward the results of the measurement, it is possible to generate efficiently...
Information and measurement in generally covariant quantum theory (2007)
Olson, S. Jay, Dowling, Jonathan P.
Due to the absence of an external, classical time variable, the probabilistic predictions of covariant quantum theory are ambiguous when multiple measurements are considered. Here, we introduce an...
A Bootstrapping Approach for Generating Maximally Path-Entangled Photon States (2006)
Kapale, Kishore T, Dowling, Jonathan P
We propose a bootstrapping approach to generation of maximally path-entangled states of photons, so called ``NOON states''. Strong atom-light interaction of cavity QED can be employed to generate...
VanMeter, N. M., Lougovski, P., Uskov, D. B., Kieling, K., Eisert, J., Dowling, Jonathan P.
We introduce schemes for linear-optical quantum state generation. A quantum state generator is a device that prepares a desired quantum state using product inputs from photon sources, linear-optical...
Strong Violations of Bell-type Inequalities for Path-Entangled Number States (2006)
Wildfeuer, Christoph F., Lund, Austin P., Dowling, Jonathan P.
We show that nonlocal correlation experiments on the two spatially separated modes of a maximally path-entangled number state may be performed and lead to a violation of a Clauser-Horne Bell...
Wilde, Mark M., Spedalieri, Federico, Dowling, Jonathan P., Lee, Hwang
We design a controlled-phase gate for linear optical quantum computing by using photodetectors that cannot resolve photon number. An intrinsic error-correction circuit corrects errors introduced by...
Agarwal, Girish S., Chan, Kam Wai, Boyd, Robert W., Cable, Hugo, Dowling, Jonathan P.
We present a theoretical analysis of the properties of an unseeded optical parametic amplifier (OPA) used as the source of entangled photons for applications in quantum lithography. We first study...
Local and Global Distinguishability in Quantum Interferometry (2006)
Durkin, Gabriel A., Dowling, Jonathan P.
A statistical distinguishability based on relative entropy characterises the fitness of quantum states for phase estimation. This criterion is employed in the context of a Mach-Zehnder interferometer...
Concatenated beam splitters, optical feed-forward and the nonlinear sign gate (2006)
Jacobs, Kurt, Dowling, Jonathan P.
We consider a nonlinear sign gate implemented using a sequence of two beam splitters, and consider the use of further sequences of beam splitters to implement feed-forward so as to correct an error...
Heisenberg limited measurements with superconducting circuits (2005)
Guillaume, Alexandre, Dowling, Jonathan P.
We describe an assembly of N superconducting qubits contained in a single-mode cavity. In the dispersive regime, the correlation between the cavity field and each qubit results in an effective...
Review article: Linear optical quantum computing (2005)
Kok, Pieter, Munro, W. J., Nemoto, Kae, Ralph, T. C., Dowling, Jonathan P., Milburn, G. J.
Linear optics with photon counting is a prominent candidate for practical quantum computing. The protocol by Knill, Laflamme, and Milburn [Nature 409, 46 (2001)] explicitly demonstrates that...
High-fidelity linear optical quantum computing with polarization encoding (2005)
Spedalieri, Federico M., Lee, Hwang, Dowling, Jonathan P.
We show that the KLM scheme [Knill, Laflamme and Milburn, Nature {\bf 409}, 46] can be implemented using polarization encoding, thus reducing the number of path modes required by half. One of the...
Generation of maximally entangled charge-qubit arrays via a cavity mode (2005)
Guillaume, Alexandre, Dowling, Jonathan P.
We describe an assembly of N Cooper-pair boxes (CPB) contained in a single mode cavity. In the dispersive regime, the correlation between the cavity field and each Cooper-pair box results in an...
Quantum Interferometric Sensors (2005)
Kapale, Kishore T., Didomenico, Leo D., Lee, Hwang, Kok, Pieter, Dowling, Jonathan P.
Quantum entanglement has the potential to revolutionize the entire field of interferometric sensing by providing many orders of magnitude improvement in interferometer sensitivity. The...
Quantum Computing, Metrology, and Imaging (2005)
Lee, Hwang, Lougovski, Pavel, Dowling, Jonathan P.
Information science is entering into a new era in which certain subtleties of quantum mechanics enables large enhancements in computational efficiency and communication security. Naturally, precise...
Kapale, Kishore T., Dowling, Jonathan P.
We propose a scheme for generation of arbitrary coherent superposition of vortex states in Bose-Einstein condensates (BEC) using the orbital angular momentum (OAM) states of light. We devise a scheme...
Quantum interferometric sensors (2005)
Kishore T. Kapale, Leo D. Didomenico, Hwang Lee, Pieter Kok, Jonathan P. Dowling
Quantum entanglement has the potential to revolutionize the entire field of interferometric sensing by providing many Concepts of Physics, Vol. II (2005) 225 orders of magnitude improvement in...
Spedalieri, Federico M., Lee, Hwang, Florescu, Marian, Kapale, Kishore T., Yurtsever, Ulvi, Dowling, Jonathan P.
We devise a new technique to enhance transmission of quantum information through linear optical quantum information processors. The idea is based on applying the Quantum Zeno effect to the process of...
Towards Linear Optical Quantum Computers (2004)
Dowling, Jonathan P., Franson, James D., Lee, Hwang, Milburn, Gerald J.
Scalable quantum computation with linear optics was considered to be impossible due to the lack of efficient two-qubit logic gates, despite its ease of implementation of one-qubit gates. Two-qubit...
Quantum lithography, entanglement and Heisenberg-limited parameter estimation (2004)
Kok, Pieter, Braunstein, Samuel L., Dowling, Jonathan P.
We explore the intimate relationship between quantum lithography, Heisenberg-limited parameter estimation and the rate of dynamical evolution of quantum states. We show how both the enhanced accuracy...
From Linear Optical Quantum Computing to Heisenberg-Limited Interferometry (2003)
Lee, Hwang, Kok, Pieter, Williams, Colin P., Dowling, Jonathan P.
The working principles of linear optical quantum computing are based on photodetection, namely, projective measurements. The use of photodetection can provide efficient nonlinear interactions between...
Towards photostatistics from photon-number discriminating detectors (2003)
Lee, Hwang, Yurtsever, Ulvi H., Kok, Pieter, Hockney, George M., Adami, Christoph, Braunstein, Samuel L., ...
We study the properties of a photodetector that has a number-resolving capability. In the absence of dark counts, due to its finite quantum efficiency, photodetection with such a detector can only...
Quantum Imaging and Metrology (2003)
Lee, Hwang, Kok, Pieter, Dowling, Jonathan P.
The manipulation of quantum entanglement has found enormous potential for improving performances of devices such as gyroscopes, clocks, and even computers. Similar improvements have been demonstrated...
An All Linear Optical Quantum Memory Based on Quantum Error Correction (2003)
Gingrich, Robert M., Kok, Pieter, Lee, Hwang, Vatan, Farrokh, Dowling, Jonathan P.
When photons are sent through a fiber as part of a quantum communication protocol, the error that is most difficult to correct is photon loss. Here, we propose and analyze a two-to-four qubit...
Conditional linear-optical measurement schemes generate effective photon nonlinearities (2003)
Lapaire, G. G., Kok, Pieter, Dowling, Jonathan P., Sipe, J. E.
We provide a general approach for the analysis of optical state evolution under conditional measurement schemes, and identify the necessary and sufficient conditions for such schemes to simulate...
Optical Communication Noise Rejection Using Correlated Photons (2003)
Jackson, Deborah J., Hockney, George M., Dowling, Jonathan P.
This paper describes a completely new way to perform noise rejection using a two-photon sensitive detector and taking advantage of the properties of correlated photons to improve an optical...
Quantum technology: the second quantum revolution (2003)
Dowling, Jonathan P., Milburn, Gerard J.
We are currently in the midst of a second quantum revolution. The first quantum revolution gave us new rules that govern physical reality. The second quantum revolution will take these rules and use...
Quantum technology: the second quantum revolution (2003)
Dowling, Jonathan P., Milburn, Gerard J.
We are currently in the midst of a second quantum revolution. The first quantum revolution gave us new rules that govern physical reality. The second quantum revolution will take these rules and use...
Thermal emissivity for finite three-dimensional photonic band gap crystals (2002)
Stimpson, Andrew J., Dowling, Jonathan P.
We discuss the results of computer model for the thermal emissivity of a three-dimensional photonic band gap (PBG) crystal, specifically an inverted opal structure. The thermal emittance for a range...
Single photons on demand from 3D photonic band-gap structures (2002)
Florescu, Marian, Scheel, Stefan, Haeffner, Hartmut, Lee, Hwang, Strekalov, Dmitry V., Knight, Peter L., ...
We describe a practical implementation of a (semi-deterministic) photon gun based on stimulated Raman adiabatic passage pumping and the strong enhancement of the photonic density of states in a...
Suitability versus fidelity for rating single-photon guns (2002)
Hockney, George M., Kok, Pieter, Dowling, Jonathan P.
The creation of specified quantum states is important for most, if not all, applications in quantum computation and communication. The quality of the state preparation is therefore an essential...
Quantum Technology: The Second Quantum Revolution (2002)
Dowling, Jonathan P., Milburn, Gerard J.
We are currently in the midst of a second quantum revolution. The first quantum revolution gave us new rules that govern physical reality. The second quantum revolution will take these rules and use...
Distributed entanglement as a probe for the quantum structure of spacetime (2002)
Kok, Pieter, Yurtsever, Ulvi, Braunstein, Samuel L., Dowling, Jonathan P.
Simultaneity is a well-defined notion in special relativity once a Minkowski metric structure is fixed on the spacetime continuum (manifold) of events. In quantum gravity, however, the metric is not...
Practical quantum repeaters with linear optics and double-photon guns (2002)
Kok, Pieter, Williams, Colin P., Dowling, Jonathan P.
We show how to create practical, efficient, quantum repeaters, employing double-photon guns, for long-distance optical quantum communication. The guns create polarization-entangled photon pairs on...
Two-photon processes in faint biphoton fields (2002)
Strekalov, Dmitry V., Stowe, Matt, Chekhova, Maria V., Dowling, Jonathan P.
The goal of this research is to determine and study a physical system that will enable a fast and intrinsically two-photon detector, which would be of interest for quantum information and metrology...
A Quantum Rosetta Stone for Interferometry (2002)
Lee, Hwang, Kok, Pieter, Dowling, Jonathan P.
Heisenberg-limited measurement protocols can be used to gain an increase in measurement precision over classical protocols. Such measurements can be implemented using, e.g., optical Mach-Zehnder...
Kok, Pieter, Lee, Hwang, Dowling, Jonathan P.
Optical quantum nondemolition devices can provide essential tools for quantum information processing. Here, we describe several optical interferometers that signal the presence of a single photon in...
Quantum Computation--The Ultimate Frontier (2002)
Adami, Chris, Dowling, Jonathan P.
The discovery of an algorithm for factoring which runs in polynomial time on a quantum computer has given rise to a concerted effort to understand the principles, advantages, and limitations of...
The creation of large photon-number path entanglement conditioned on photodetection (2001)
Kok, Pieter, Lee, Hwang, Dowling, Jonathan P.
Large photon-number path entanglement is an important resource for enhanced precision measurements and quantum imaging. We present a general constructive protocol to create any large photon number...
Lee, Hwang, Kok, Pieter, Cerf, Nicolas J., Dowling, Jonathan P.
We propose a method for preparing maximal path entanglement with a definite photon number N, larger than two, using projective measurements. In contrast with the previously known schemes, our method...
Quantum interferometric optical lithography:towards arbitrary two-dimensional patterns (2000)
Kok, Pieter, Boto, Agedi N., Abrams, Daniel S., Williams, Colin P., Braunstein, Samuel L., Dowling, Jonathan P.
As demonstrated by Boto et al. [Phys. Rev. Lett. 85, 2733 (2000)], quantum lithography offers an increase in resolution below the diffraction limit. Here, we generalize this procedure in order to...
Yurtsever, Ulvi, Dowling, Jonathan P.
Recent work has raised the possibility that quantum information theory techniques can be used to synchronize atomic clocks nonlocally. One of the proposed algorithms for quantum clock synchronization...
Quantum Clock Synchronization Based on Shared Prior Entanglement (2000)
Jozsa, Richard, Abrams, Daniel S., Dowling, Jonathan P., Williams, Colin P.
We demonstrate that two spatially separated parties (Alice and Bob) can utilize shared prior quantum entanglement, and classical communications, to establish a synchronized pair of atomic clocks. In...
Boto, Agedi N., Kok, Pieter, Abrams, Daniel S., Braunstein, Samuel L., Williams, Colin P., Dowling, Jonathan P.
Classical, interferometric, optical lithography is diffraction limited to writing features of a size lambda/2 or greater, where lambda is the optical wavelength. Using nonclassical photon number...
Maxwell Duality, Lorentz Invariance, and Topological Phase (1999)
Dowling, Jonathan P., Williams, Colin P., Franson, J. D.
We discuss the Maxwell electromagnetic duality relations between the Aharonov-Bohm, Aharonov-Casher, and He-McKellar-Wilkens topological phases, which allows a unified description of all three...
I consider an exact model of atomic spontaneous dipole emission and classical dipole radiation in a finite photonic band-gap structure. The full 3D or 2D problem is reduced to a finite 1D model, and...
Spontaneous Emission and Nonlinear Effects in Photonic Bandgap Materials (1998)
Ishella S Fogel, Jon M Bendickson, Michael D Tocci, Mark J Bloemer, Michael Scalora, Charles M Bowden, ...
. We summarize and review our theoretical and experimental work on spontaneous emission and nonlinear effects in one-dimensional, photonic bandgap (PBG) structures. We present a new result: a method...
Quantum electrodynamics based on self-fields : cavity effects / (1988)
Thesis (Ph. D.)--University of Colorado, 1988.