Comment on "Rovibrational quantum interferometers and gravitational waves" (2009)
Khriplovich, I. B., Lamoreaux, S. K., Sushkov, A. O., Sushkov, O. P.
In a recent paper, Wicht, L\"ammerzahl, Lorek, and Dittus [Phys. Rev. {\bf A 78}, 013610 (2008)] come to the conclusion that a molecular rotational-vibrational quantum interferometer may possess the...
Sushkov, A. O., Eckel, S., Lamoreaux, S. K.
We propose to use ferroelectric (Eu,Ba)TiO$_3$ ceramics just above their magnetic ordering temperature for a sensitive electron electric dipole moment search. We have synthesized a number of such...
Surface Contact Potential Patches and Casimir Force Measurements (2009)
Kim, Woo-Joong, Sushkov, A. O., Dalvit, Diego A. R., Lamoreaux, S. K.
We present calculations of contact potential surface patch effects that simplify previous treatments. It is shown that, because of the linearity of Laplace's equation, the presence of patch...
Measuring the Neutron Lifetime Using Magnetically Trapped Neutrons (2009)
O'Shaughnessy, C. M., Golub, R., Schelhammer, K. W., Swank, C. M., Huffman, P. R., ...
The neutron beta-decay lifetime plays an important role both in understanding weak interactions within the framework of the Standard Model and in theoretical predictions of the primordial abundance...
First measurement of the neutron β asymmetry with ultracold neutrons (2009)
Anaya, J., Back, H. O., Boissevain, J. G., Bowles, T. J., Broussard, L. J., ...
We report the first measurement of an angular correlation parameter in neutron β decay using polarized ultracold neutrons (UCN). We utilize UCN with energies below about 200 neV, which we guide and...
Measurement of the Casimir force between Germanium plates using a torsion balance (2008)
Kim, W. J., Sushkov, A. O., Dalvit, D. A. R., Lamoreaux, S. K.
We report the measurement of the Casimir force between Ge plates in a sphere-plane configuration using a torsion balance. We observe that the effective contact potential between the plates varies...
Variation of the Fine-Structure Constant and Laser Cooling of Atomic Dysprosium (2008)
Leefer, N. A., Cingöz, A., Budker, D., Ferrell, S. J., Yashchuk, V. V., Lapierre, A., ...
Radio-frequency electric-dipole transitions between nearly degenerate, opposite parity levels of atomic dysprosium (Dy) were monitored over an eight-month period to search for a variation in the...
Sushkov, A. O., Eckel, S., Lamoreaux, S. K.
We address a number of issues regarding solid state electron electric dipole moment (EDM) experiments, focusing on gadolinium iron garnet (abbreviated GdIG, chemical formula Gd$_3$Fe$_5$O$_{12}$) as...
Eckel, S., Sushkov, A. O., Lamoreaux, S. K.
We study the magnetic properties of Gadolinium-Yttrium Iron Garnet ($\text{Gd}_{x}\text{Y}_{3-x}\text{Fe}_5\text{0}_{12}$, $x=3,1.8$) ferrite ceramics. The complex initial permeability is measured in...
Quantum cryptography with polarization, phase and time encoding (2008)
Buttler, W. T., Lamoreaux, S. K.
We develop and present a quantum cryptography concept in which phase determinations are made from the time that a photon is detected, as opposed to where the photon is detected, and hence is a...
The role of 3He-3He collisions in our diffusion experiment is addressed and shown to not be relevant to the measurement of 3He diffusion against phonons in superfluid helium.
LA-UR-97-3301 Title: The Los Alamos Trapped Ion Quantum Computer Experiment (2007)
J. J. Gomez, M. S. Gulley, M. M. Schauer, C. M. Simmons, ...
Energy under contract W-7405-ENG-36. By acceptance of this article, the publisher recognizes that the U.S. Government retains a nonexclusive, royalty-free license to publish or reproduce the...
Ferrell, S. J., Cingöz, A., Lapierre, A., Leefer, N., Budker, D., ...
Radio-frequency E1 transitions between nearly degenerate, opposite parity levels of atomic dysprosium were monitored over an eight month period to search for a variation in the fine-structure...
Dressed Spin of Helium-3 (2007)
Esler, A., Peng, J. C., Lamoreaux, S. K., Chandler, D., Howell, D., ...
We report a measurement of dressed-spin effects of polarized 3He atoms from a cold atomic source traversing a region of constant magnetic field B0 and a transverse oscillatory dressing field Bd...
Time-variability of alpha from realistic models of Oklo reactors (2007)
Gould, C. R., Sharapov, E. I., Lamoreaux, S. K.
We reanalyze Oklo $^{149}$Sm data using realistic models of the natural nuclear reactors. Disagreements among recent Oklo determinations of the time evolution of $\alpha$, the electromagnetic fine...
We point out that the rotation of the Earth leads to a non-negligible apparent electric-dipole moment effect for this experiment.
Limit on the Temporal Variation of the Fine-Structure Constant Using Atomic Dysprosium (2006)
Cingoz, A., Lapierre, A., Leefer, N., Budker, D., Lamoreaux, S. K., ...
Over a period of eight months, we have monitored transition frequencies between nearly degenerate, opposite-parity levels in two isotopes of atomic dysprosium (Dy). These transition frequencies are...
Barabanov, Authors A. L., Golub, R., Lamoreaux, S. K.
The search for particle electric dipole moments (edm) represents a most promising way to search for physics beyond the standard model. A number of groups are planning a new generation of experiments...
Long, J. C., Barnes, P. D., Boissevain, J. G., Clark, D. J., Cooper, M. D., Gomez, J. J., ...
A new search for a permanent electric dipole moment (EDM) of the neutron is underway using ultracold neutrons produced and held in a bath of superfluid helium. Attaining the target sensitivity...
Barabanov, A. L., Golub, R., Lamoreaux, S. K.
The search for particle electric dipole moments represents a most promising way to search for physics beyond the standard model. A number of groups are planning a new generation of experiments using...
On the sensitivity of condensed-matter P- and T-violation experiments (2005)
Budker, D., Lamoreaux, S. K., Sushkov, A. O., Sushkov, O. P.
Experiments searching for parity- and time-reversal-invariance-violating effects that rely on measuring magnetization of a condensed-matter sample induced by application of an electric field are...
Measurement of the electron electric dipole moment using GdIG (2005)
Heidenreich, B. J., Elliott, O. T., Charney, N. D., Virgien, K. A., Bridges, A. W., McKeon, M. A., ...
A new method for the detection of the electron edm using a solid is described. The method involves the measurement of a voltage induced across the solid by the alignment of the samples magnetic...
Collisional perturbation of radio-frequency E1 transitions in an atomic beam of dysprosium (2005)
Cingoz, A., Budker, D., Lamoreaux, S. K., Torgerson, J. R.
We have studied collisional perturbations of radio-frequency (rf) electric-dipole (E1) transitions between the nearly degenerate opposite-parity levels in atomic dysprosium (Dy) in the presence of 10...
Buttler, W. T., Lamoreaux, S. K., Omenetto, F. G., Torgerson, J. R.
This work considers current potential uses of laser Doppler velocimetry. A discussion of other optical velocimetry techniques is presented and compared with their practical application to modern...
Lamoreaux, S. K., Buttler, W. T.
A general analysis of thermal noise in torsion pendulums is presented. The specific case where the torsion angle is kept fixed by electronic feedback is analyzed. This analysis is applied to a recent...
The search for particle electric dipole moments (edm) is one of the best places to look for physics beyond the standard model because the size of time reversal violation predicted by the standard...
Kerr effect in liquid helium at temperatures below the superfluid transition (2004)
Sushkov, A. O., Williams, E., Yashchuk, V. V., Budker, D., Lamoreaux, S. K.
The electro-optical Kerr effect induced by a slowly-varying applied electric field in liquid helium at temperatures below the $\lambda$-point is investigated. The Kerr constant of liquid helium is...
Demonstration of a solid deuterium source of ultra-cold neutrons (2003)
Saunders, A., Anaya, J. M., Bowles, T. J., Filippone, B. W., Geltenbort, P., Hill, R. E., ...
Ultra-cold neutrons (UCN), neutrons with energies low enough to be confined by the Fermi potential in material bottles, are playing an increasing role in measurements of fundamental properties of the...
Torgerson, J. R., Lamoreaux, S. K.
The frequency spectrum of the finite temperature correction to the Casimir force can be determined by use of the Lifshitz formalism for metallic plates of finite conductivity. We show that the...
Neutron Moderation in the Oklo Natural Reactor and the Time Variation of alpha (2003)
In the analysis of the Oklo (gabon) natural reactor to test for a possible time variation of the fine structure constant alpha, a Maxwell-Boltzmann low energy neutron spectrum was assumed. We present...
Nguyen, A. T., Budker, D., Lamoreaux, S. K., Torgerson, J. R.
It has been proposed that the radio-frequency electric-dipole (E1) transition between two nearly degenerate opposite-parity states in atomic dysprosium should be highly sensitive to possible temporal...
Lamoreaux, S. K., Saunders, A., Smith, D., Young, A. R.
Controlling and measuring the concentration of para-D2 is an essential step toward realizing solid deuterium as an intense ultra-cold neutron (UCN) source. To this end, we implemented an experimental...
Schoen, K., Jacobson, D. L., Arif, M., Huffman, P. R., Black, T. C., Snow, W. M., ...
We have performed high-precision measurements of the coherent neutron scattering lengths of gas phase molecular hydrogen and deuterium using neutron interferometry. After correcting for molecular...
Black, T. C., Huffman, P. R., Jacobson, D. L., Snow, W. M., Schoen, K., Arif, M., ...
We have performed the first high precision measurement of the coherent neutron scattering length of deuterium in a pure sample using neutron interferometry. We find b_nd = (6.665 +/- 0.004) fm in...
Measurements of Ultracold-Neutron Lifetimes in Solid Deuterium (2002)
Morris, C. L., Anaya, J.M., Bowles, T. J., Filippone, B.W., Geltenbort, P., Hill, R. E., ...
We present the first measurements of the survival time of ultracold neutrons (UCNs) in solid deuterium (SD2). This critical parameter provides a fundamental limitation to the effectiveness of...
Torgerson, J. R., Lamoreaux, S. K.
The frequency spectrum of the finite temperature correction to the Casimir force can be determined by the use of the Lifshitz formalism for metallic plates of finite conductivity. We show that the...
We present experimental measurements of the properties of a liquid "Fomblin" surface obtained by the quasielastic scattering of laser light. The properties include the surface tension and viscosity...
Fast, efficient error reconciliation for quantum cryptography (2002)
Buttler, W. T., Lamoreaux, S. K., Torgerson, J. R., Nickel, G. H., Donahue, C. H., Peterson, C. G.
We describe a new error reconciliation protocol {\it Winnow} based on the exchange of parity and Hamming's ``syndrome'' for $N-$bit subunits of a large data set. {\it Winnow} was developed in the...
Lamoreaux, S. K., Archibald, G., Barnes, P. D., Buttler, W. T., Clark, D. J., Cooper, M. D., ...
We have measured the mass diffusion coefficient D of 3He in superfluid 4He at temperatures lower than were previously possible. The experimental technique utilizes scintillation light produced when...
Measurements of ultracold neutron lifetimes in solid deuterium (2001)
Morris, C. L., Anaya, J. M., Bowles, T. J., Filippone, B. W., Geltenbort, P., Hill, R. E., ...
We present the first measurements of the survival time of ultracold neutrons (UCNs) in solid deuterium SD2. This critical parameter provides a fundamental limitation to the effectiveness of...
Solid State Systems for Electron Electric Dipole Moment and other Fundamental Measurements (2001)
In 1968, F.L. Shapiro published the suggestion that one could search for an electron EDM by applying a strong electric field to a substance that has an unpaired electron spin; at low temperature, the...
Magnetically Stabilized Luminescent Excitations in Hexagonal Boron Nitride (2001)
Huffman, P. R., Brome, C. R., Butterworth, J. S., Dzhosyuk, S. N., Golub, R., Lamoreaux, S. K., ...
Magnetically stabilized luminescence is observed in hexagonal boron nitride. The luminescence is induced by absorption of cold neutrons and is in the visible region. In the absence of a magnetic...
Magnetic trapping of ultracold neutrons (2001)
Brome, C. R., Butterworth, J. S., Dzhosyuk, S. N., Mattoni, C. E. H., McKinsey, D. N., Doyle, J. M., ...
Three-dimensional magnetic confinement of neutrons is reported. Neutrons are loaded into an Ioffe-type superconducting magnetic trap through inelastic scattering of cold neutrons with 4He. Scattered...
Observation of power-law scaling for phase transitions in linear trapped ion crystals (2000)
Enzer, D. G., Schauer, M. M., Gomez, J. J., Gulley, M. S., Holzscheiter, M. H., Kwiat, P. G., ...
We report an experimental confirmation of the power-law relationship between the critical anisotropy parameter and ion number for the linear-to-zigzag phase transition in an ionic crystal. Our...
Observation of Power-Law Scaling for Phase Transitions in Linear Trapped Ion Crystals (2000)
Enzer, D. G., Schauer, M. M., Gomez, J. J., Gulley, M. S., Holzscheiter, M. H., Kwiat, P. G., ...
We report an experimental confirmation of the power-law relationship between the critical anisotropy parameter and ion number for the linear-to-zigzag phase transition in an ionic crystal. Our...
UCN Upscattering rates in a molecular deuterium crystal (2000)
Young, A. R., Lamoreaux, S. K.
A calculation of ultra-cold neutron (UCN) upscattering rates in molecular deuterium solids has been carried out, taking into account intra-molecular exictations and phonons. The different moelcular...
Daylight quantum key distribution over 1.6 km (2000)
Buttler, W. T., Hughes, R. J., Lamoreaux, S. K., Morgan, G. L., Nordholt, J. E., Peterson, C. G.
Quantum key distribution (QKD) has been demonstrated over a point-to-point $\sim1.6$-km atmospheric optical path in full daylight. This record transmission distance brings QKD a step closer to...
Magnetic Trapping of Neutrons (2000)
Huffman, P. R., Brome, C. R., Butterworth, J. S., Coakley, K. J., Dewey, M. S., Dzhosyuk, S. N., ...
Accurate measurement of the lifetime of the neutron (which is unstable to beta decay) is important for understanding the weak nuclear force and the creation of matter during the Big Bang. Previous...
Observation of Power-Law Scaling for Phase Transitions in Linear Trapped Ion Crystals (2000)
Enzer, D. G., Schauer, M. M., Gomez, J. J., Gulley, M. S., Holzscheiter, M. H., Kwiat, P. G., ...
We report an experimental confirmation of the power-law relationship between the critical anisotropy parameter and ion number for the linear-to-zigzag phase transition in an ionic crystal. Our...
Observation of power-law scaling for phase transitions in linear trapped ion crystals (2000)
Enzer, D. G., Schauer, M. M., Gomez, J. J., Gulley, M. S., Holzscheiter, M. H., Kwiat, P. G., ...
Observation of Power-Law Scaling for Phase Transitions in Linear Trapped Ion Crystals (2000)
Enzer, D. G., Schauer, M. M., Gomez, J. J., Gulley, M. S., Holzscheiter, M. H., Kwiat, P. G., ...
We report an experimental confirmation of the power-law relationship between the critical anisotropy parameter and ion number for the linear-to-zigzag phase transition in an ionic crystal. Our...
Calculation of the ultracold neutron upscattering rate from para-deuterium bound in a lattice (1999)
Young, A. R., Lamoreaux, S. K.
The ultracold neutron (UCN) upscattering rate from para-deuterium contaminated solid deuterium near T=0K is calculated and found to be 4 msec for a room-temperature-equilibrium concentration. The...
Calculation of the interaction of a neutron spin with an atomic electric field (1999)
The Thomas-Fermi approximation for an atomic wavefunction is used to calculate the interaction of a neutron spin with the atomic electric field, either through motional magnetic (v x E) or possibly...
Experimental Verifications of the Casimir Attractive Force between Solid Bodies (1999)
A brief review of the recent experimental verifications of the Casimir force between extended bodies is presented. With modern techniques, it now appears feasible to test the force law with 1%...
Comment on "New Experimental Limit for the Electric Dipole Moment of the Neutron" (1999)
A new limit for the neutron electric dipole moment has been recently reported. This new limit is obtained by combining the result from a previous experiment with the result from a more recent...
We discuss the proposal of Freedman, Ringo, and Dombeck to search for the neutron electric dipole moment use of the acceleration of neutrons in an inhomogeneous electric field followed by...
Trapped Ion Quantum Computer Research at Los Alamos (1999)
James, D. F. V., Gulley, M. S., Holzscheiter, M. H., Hughes, R. J., Kwiat, P. G., Lamoreaux, S. K., ...
Trapped Ion Quantum Computer Research at Los Alamos (1998)
James, D. F. V., Gulley, M. S., Holzscheiter, M. H., Hughes, R. J., Kwiat, P. G., Lamoreaux, S. K., ...
We briefly review the development and theory of an experiment to investigate quantum computation with trapped calcium ions. The ion trap, laser and ion requirements are determined, and the parameters...
Trapped Ion Quantum Computer Research at Los Alamos (1998)
James, D. F. V., Gulley, M. S., Holzscheiter, M. H., Hughes, R. J., Kwiat, P. G., Lamoreaux, S. K., ...
We briefly review the development and theory of an experiment to investigate quantum computation with trapped calcium ions. The ion trap, laser and ion requirements are determined, and the parameters...
Practical free-space quantum key distribution over 1 km (1998)
Buttler, W. T., Hughes, R. J., Kwiat, P. G., Lamoreaux, S. K., Luther, G. G., Morgan, G. L., ...
A working free-space quantum key distribution (QKD) system has been developed and tested over an outdoor optical path of ~1 km at Los Alamos National Laboratory under nighttime conditions. Results...
Trapped Ion Quantum Computer Research at Los Alamos (1998)
James, D. F. V., Gulley, M. S., Holzscheiter, M. H., Hughes, R. J., Kwiat, P. G., Lamoreaux, S. K., ...
We briefly review the development and theory of an experiment to investigate quantum computation with trapped calcium ions. The ion trap, laser and ion requirements are determined, and the parameters...
Trapped Ion Quantum Computer Research at Los Alamos (1998)
James, D. F. V., Gulley, M. S., Holzscheiter, M. H., Hughes, R. J., Kwiat, P. G., Lamoreaux, S. K., ...
We briefly review the development and theory of an experiment to investigate quantum computation with trapped calcium ions. The ion trap, laser and ion requirements are determined, and the parameters...
R. J. Hughes, J. J. Gomez, M. S. Gulley, M. H. Holzscheiter, P. G. Kwiat, ...
The development and theory of an experiment to investigate quantum computation with trapped calcium ions is described. The ion trap, laser and ion requirements are determined, and the parameters...
R. J. Hughes, J. J. Gomez, M. S. Gulley, M. H. Holzscheiter, P. G. Kwiat, ...
The development and theory of an experiment to investigate quantum computation with trapped calcium ions is described. The ion trap, laser and ion requirements are determined, and the parameters...
The Los Alamos Trapped Ion Quantum Computer Experiment (1997)
Hughes, R. J., James, D. F. V., Gomez, J. J., Gulley, M. S., Holzscheiter, M. H., Kwiat, P. G., ...
The development and theory of an experiment to investigate quantum computation with trapped calcium ions is described. The ion trap, laser and ion requirements are determined, and the parameters...
The Los Alamos Trapped Ion Quantum Computer Experiment (1997)
Hughes, R. J., James, D. F. V., Gomez, J. J., Gulley, M. S., Holzscheiter, M. H., Kwiat, P. G., ...
The development and theory of an experiment to investigate quantum computation with trapped calcium ions is described. The ion trap, laser and ion requirements are determined, and the parameters...
The Los Alamos Trapped Ion Quantum Computer Experiment (1997)
Hughes, R. J., James, D. F. V., Gomez, J. J., Gulley, M. S., Holzscheiter, M. H., Kwiat, P. G., ...
The development and theory of an experiment to investigate quantum computation with trapped calcium ions is described. The ion trap, laser and ion requirements are determined, and the parameters...
The Los Alamos Trapped Ion Quantum Computer Experiment (1997)
Hughes, R. J., James, D. F. V., Gomez, J. J., Gulley, M. S., Holzscheiter, M. H., Kwiat, P. G., ...
The development and theory of an experiment to investigate quantum computation with trapped calcium ions is described. The ion trap, laser and ion requirements are determined, and the parameters...
The neutron electric dipole moment experiment in preparation at the ILL (1995)
Alterev, I S, Borisov, Yu V, Chibane, Y, Drexel, W, Heckel, B R, Green, K, ...
A SEARCH FOR THE ELECTRIC DIPOLE MOMENT OF THE NEUTRON (1990)
Smith, K F, Crampin, N, Pendlebury, J M, Richardson, D J, Shiers, D, Green, K, ...
Trapped Ion Quantum Computer Research at Los Alamos
James, D. F. V., Gulley, M. S., Holzscheiter, M. H., Hughes, R. J., Kwiat, P. G., Lamoreaux, S. K., ...
We briefly review the development and theory of an experiment to investigate quantum computation with trapped calcium ions. The ion trap, laser and ion requirements are determined, and the parameters...
The Los Alamos Trapped Ion Quantum Computer Experiment
Hughes, R. J., James, D. F. V., Gomez, J. J., Gulley, M. S., Holzscheiter, M. H., Kwiat, P. G., ...
The development and theory of an experiment to investigate quantum computation with trapped calcium ions is described. The ion trap, laser and ion requirements are determined, and the parameters...
Observation of Power-Law Scaling for Phase Transitions in Linear Trapped Ion Crystals
Enzer, D. G., Schauer, M. M., Gomez, J. J., Gulley, M. S., Holzscheiter, M. H., Kwiat, P. G., ...
We report an experimental confirmation of the power-law relationship between the critical anisotropy parameter and ion number for the linear-to-zigzag phase transition in an ionic crystal. Our...
The Los Alamos Trapped Ion Quantum Computer Experiment
Hughes, R. J., James, D. F. V., Gomez, J. J., Gulley, M. S., Holzscheiter, M. H., Kwiat, P. G., ...
The development and theory of an experiment to investigate quantum computation with trapped calcium ions is described. The ion trap, laser and ion requirements are determined, and the parameters...