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63
Laser cooling and trapping of neutral atoms
 Prog. Quantum Electron
, 1997
"... Abstract: The ability to cool, manipulate, and trap atoms using laser light has allowed a new, rapidly expanding field to emerge. Current research focuses on improving existing cooling techniques, and the development of cold atoms as a source for applications ranging from atomic clocks to studies of ..."
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Abstract: The ability to cool, manipulate, and trap atoms using laser light has allowed a new, rapidly expanding field to emerge. Current research focuses on improving existing cooling techniques, and the development of cold atoms as a source for applications ranging from atomic clocks to studies of quantum degeneracy. This review explains the basic mechanisms used in laser cooling and
Standards of time and frequency at the outset of the 21st century,” Science 306
, 1318
"... After 50 years of development, microwave atomic clocks based on cesium have achieved fractional uncertainties below 1 part in 1015, a level unequaled in all of metrology. The past 5 years have seen the accelerated development of optical atomic clocks, which may enable even greater improvements in ti ..."
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After 50 years of development, microwave atomic clocks based on cesium have achieved fractional uncertainties below 1 part in 1015, a level unequaled in all of metrology. The past 5 years have seen the accelerated development of optical atomic clocks, which may enable even greater improvements in timekeeping. Time and frequency standards with various levels of performance are ubiquitous in our society, with applications in many technological fields as well as in the continued exploration of the frontiers of basic science. We review stateoftheart atomic time and frequency standards and discuss some of their uses in science and technology. As important as Btime [ might be to those who are navigators, scientists, or even musicians, it is no more than an arbitrary parameter that is used to describe dynamics, or the mechanics of motion. David Mermin was struck by this as he wondered about the role that time and space would play in
Geometric quantum computation
 J. Mod. Opt
"... Abstract. We describe in detail a general strategy for implementing a conditional geometric phase between two spins. Combined with singlespin operations, this simple operation is a universal gate for quantum computation, in that any unitary transformation can be implemented with arbitrary precision ..."
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Abstract. We describe in detail a general strategy for implementing a conditional geometric phase between two spins. Combined with singlespin operations, this simple operation is a universal gate for quantum computation, in that any unitary transformation can be implemented with arbitrary precision using only singlespin operations and conditional phase shifts. Thus quantum geometrical phases can form the basis of any quantum computation. Moreover, as the induced conditional phase depends only on the geometry of the paths executed by the spins it is resilient to certain types of errors and oå ers the potential of a naturally faulttolerant way of performing quantum computation. 1.
Dynamics of BoseEinstein condensates near a Feshbach resonance
 University of Colorado
, 2003
"... The final copy of this thesis has been examined by the signatories, and we find that both the content and the form meet acceptable presentation standards of scholarly work in the above mentioned discipline. iii ..."
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The final copy of this thesis has been examined by the signatories, and we find that both the content and the form meet acceptable presentation standards of scholarly work in the above mentioned discipline. iii
Ultrahigh sensitivity accelerometers and gyroscopes using neutral atom matter–wave interferometry
 Physica B
, 1988
"... This paper shows that matterwave interferometers employing lowvelocity neutral atoms can be used as inertial sensors with sensitivities that exceed those of conventional mechanical sensors and multiple circuit optical interferometers by many powers of ten. The energy and mass dependence of the pha ..."
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This paper shows that matterwave interferometers employing lowvelocity neutral atoms can be used as inertial sensors with sensitivities that exceed those of conventional mechanical sensors and multiple circuit optical interferometers by many powers of ten. The energy and mass dependence of the phase shifts that are due to rotation and acceleration are different. Thus a pair of interferometers with different energies and/or masses can perform simultaneous independent measurements of rotation and acceleration. A proposed configuration is one formed by a sequence of planar diffraction gratings operating in high order. Gratings consist of nearresonant standingwave laser beams. Laser decelerated and cooled atomic beams provide a suitable source. Path curvature due to acceleration and rotation is canceled by magnetic field gradients that produce an effective magnetic levitation of the atoms in a feedback arrangement that maintains null phase shift. I.
Quantum State Manipulation Of Trapped Atomic Ions
, 1996
"... : A single lasercooled and trapped Be ion is used to investigate methods of coherent 9 + quantumstate synthesis and quantum logic. We create and characterize nonclassical states of motion including "Schrödingercat" states. A fundamental quantum logic gate is realized which uses two st ..."
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Cited by 6 (0 self)
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: A single lasercooled and trapped Be ion is used to investigate methods of coherent 9 + quantumstate synthesis and quantum logic. We create and characterize nonclassical states of motion including "Schrödingercat" states. A fundamental quantum logic gate is realized which uses two states of the quantized ion motion and two ion internal states as qubits. We explore some of the applications for, and problems in realizing, quantum computation based on multiple trapped ions. V w V o 2 cos(6 T t) 1 # x 2 # y 2 R 2 , 2 (1) 1. INTRODUCTION Currently, a major theme in atomic, molecular, and optical physics is coherent control of quantum states. This theme is manifested in a number of topics such as atom interferometry, BoseEinstein condensation and the atom laser, cavity QED, quantum computation, quantumstate engineering, wavepacket dynamics, and coherent control of chemical reactions. Here, we report related trappedion research at NIST which is devoted primarily to a...
Prospects for atom interferometry
 Contemporary Physics
"... Atom interferometers were ® rst realized ten years ago, and since then have evolved from beautiful demonstrations of quantum physics into instruments at the leading edge of precision measurement. In this article we trace the development of atom interferometry, looking at how the physical principles ..."
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Atom interferometers were ® rst realized ten years ago, and since then have evolved from beautiful demonstrations of quantum physics into instruments at the leading edge of precision measurement. In this article we trace the development of atom interferometry, looking at how the physical principles have been put into practice to achieve groundbreaking experiments. We also discuss new atom optical techniques that are becoming available and anticipate the ways in which the consequent improvements will provide new opportunitie s in metrology and the study of fundamental physics. 1.
Accuracy evaluation of the primary frequency standard NIST7
 Metrologia
, 2001
"... Abstract. We develop a comprehensive approach to the evaluation of the uncertainty of a primary frequency standard. Indirect, modeldependent means are employed for the evaluation of all known biases. This approach leads to a lower combined standard uncertainty (CSU) and leaves frequency measurement ..."
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Abstract. We develop a comprehensive approach to the evaluation of the uncertainty of a primary frequency standard. Indirect, modeldependent means are employed for the evaluation of all known biases. This approach leads to a lower combined standard uncertainty (CSU) and leaves frequency measurements under altered conditions as a powerful search technique for unknown biases. We report the results of this evaluation technique applied to NIST7, one of the United States ’ primary frequency standards. The best CSU value we have reported to the Bureau International des Poids et Mesures (BIPM) is, while a rigorous application of this evaluation process would suggest that a limiting Type B uncertainty of is possible. We discuss this difference and the implications of reporting optimistic values. We also discuss the history of reported evaluations of NIST7 including those made before the full implementation of the techniques presented here. 1.
High Fidelity Quantum Information Processing with Trapped Ions
, 2006
"... The final copy of this thesis has been examined by the signatories, and we find that both the content and the form meet acceptable presentation standards of scholarly work in the above mentioned discipline. ..."
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Cited by 5 (0 self)
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The final copy of this thesis has been examined by the signatories, and we find that both the content and the form meet acceptable presentation standards of scholarly work in the above mentioned discipline.
On deflection fields, weakfocusing and strongfocusing storage rings for polar molecules
 Physical Chemistry Chemical Physics
, 1905
"... In this paper, we analyze electric deflection fields for polar molecules in terms of a multipole expansion and derive a simple but rather insightful expression for the force on the molecules. Ideally, a deflection field exerts a strong, constant force in one direction, while the force in the other d ..."
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In this paper, we analyze electric deflection fields for polar molecules in terms of a multipole expansion and derive a simple but rather insightful expression for the force on the molecules. Ideally, a deflection field exerts a strong, constant force in one direction, while the force in the other directions is zero. We show how, by a proper choice of the expansion coefficients, this ideal can be best approximated. We present a design for a practical electrode geometry based on this analysis. By bending such a deflection field into a circle, a simple storage ring can be created; the direct analog of a weakfocusing cyclotron for charged particles. We show that for realistic parameters a weakfocusing ring is only stable for molecules with a very low velocity. A strongfocusing (alternatinggradient) storage ring can be created by arranging many straight deflection fields in a circle and by alternating the sign of the hexapole term between adjacent deflection fields. The acceptance of this ring is numerically calculated for realistic parameters. Such a storage ring might prove useful in experiments looking for an EDM of elementary particles. 1