The Experts below are selected from a list of 276 Experts worldwide ranked by ideXlab platform
Jean Dalibard - One of the best experts on this subject based on the ideXlab platform.
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Geometric potentials in quantum optics: A semi-Classical Interpretation
EPL - Europhysics Letters, 2008Co-Authors: Marc Cheneau, Steffen Patrick Rath, Tarik Yefsah, Kenneth John Günter, Gediminas Juzeliunas, Jean DalibardAbstract:We propose a semi-Classical Interpretation of the geometric scalar and vector potentials that arise due to Berry's phase when an atom moves slowly in a light field. Starting from the full quantum Hamiltonian, we turn to a Classical description of the atomic centre-of-mass motion while still treating the internal degrees of freedom as quantum variables. We show that the scalar potential can be identified as the kinetic energy of an atomic micro-motion caused by quantum fluctuations of the radiative force, and that the Lorentz-type force appears as a result of the motion-induced perturbation of the internal atomic state. For a specific configuration involving two counter-propagating Gaussian laser beams, we relate the geometric forces to the radiation pressure and dipole forces known from quantum optics. The simple physical pictures provided by the present analysis may help for the design and the implementation of novel geometric forces.
Marc Cheneau - One of the best experts on this subject based on the ideXlab platform.
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Geometric potentials in quantum optics: A semi-Classical Interpretation
EPL - Europhysics Letters, 2008Co-Authors: Marc Cheneau, Steffen Patrick Rath, Tarik Yefsah, Kenneth John Günter, Gediminas Juzeliunas, Jean DalibardAbstract:We propose a semi-Classical Interpretation of the geometric scalar and vector potentials that arise due to Berry's phase when an atom moves slowly in a light field. Starting from the full quantum Hamiltonian, we turn to a Classical description of the atomic centre-of-mass motion while still treating the internal degrees of freedom as quantum variables. We show that the scalar potential can be identified as the kinetic energy of an atomic micro-motion caused by quantum fluctuations of the radiative force, and that the Lorentz-type force appears as a result of the motion-induced perturbation of the internal atomic state. For a specific configuration involving two counter-propagating Gaussian laser beams, we relate the geometric forces to the radiation pressure and dipole forces known from quantum optics. The simple physical pictures provided by the present analysis may help for the design and the implementation of novel geometric forces.
Xin Zhang - One of the best experts on this subject based on the ideXlab platform.
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Performance Limits for Monopulse Matched Filter
2020Co-Authors: William Dale Blair, Xin ZhangAbstract:Via jointly processing multiple (sum, azimuth- and elevation-difference) monopulse matched filter samples it is possible to extract and localize several (more than two) tar- gets spaced more closely than the Classical Interpretation of radar resolution. This paper derives the Cram´ er-Rao lower bound (CRLB) for sampled monopulse radar data.
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Performance limits for monopulse matched filter samples
2009 IEEE Aerospace conference, 2009Co-Authors: Peter Willett, William Dale Blair, Xin ZhangAbstract:Via jointly processing multiple (sum, azimuth- and elevation-difference) monopulse matched filter samples it is possible to extract and localize several (more than two) targets spaced more closely than the Classical Interpretation of radar resolution. This paper derives the Cramer-Rao lower bound (CRLB) for sampled monopulse radar data.
Anthony F Starace - One of the best experts on this subject based on the ideXlab platform.
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Classical Interpretation of the quantum description of h photodetachment in parallel e and b fields
Physical Review A, 1997Co-Authors: Qiaoling Wang, Anthony F StaraceAbstract:Total quantum mechanical cross sections for photodetachment of H{sup {minus}} in parallel {ital E} and {ital B} fields are examined both analytically and numerically to extract information which has a Classical Interpretation, thereby complementing recent Classical and semiClassical periodic orbit studies. {copyright} {ital 1997} {ital The American Physical Society}
Steffen Patrick Rath - One of the best experts on this subject based on the ideXlab platform.
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Geometric potentials in quantum optics: A semi-Classical Interpretation
EPL - Europhysics Letters, 2008Co-Authors: Marc Cheneau, Steffen Patrick Rath, Tarik Yefsah, Kenneth John Günter, Gediminas Juzeliunas, Jean DalibardAbstract:We propose a semi-Classical Interpretation of the geometric scalar and vector potentials that arise due to Berry's phase when an atom moves slowly in a light field. Starting from the full quantum Hamiltonian, we turn to a Classical description of the atomic centre-of-mass motion while still treating the internal degrees of freedom as quantum variables. We show that the scalar potential can be identified as the kinetic energy of an atomic micro-motion caused by quantum fluctuations of the radiative force, and that the Lorentz-type force appears as a result of the motion-induced perturbation of the internal atomic state. For a specific configuration involving two counter-propagating Gaussian laser beams, we relate the geometric forces to the radiation pressure and dipole forces known from quantum optics. The simple physical pictures provided by the present analysis may help for the design and the implementation of novel geometric forces.