The Experts below are selected from a list of 243 Experts worldwide ranked by ideXlab platform
Christopher Jarzynski - One of the best experts on this subject based on the ideXlab platform.
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work distribution for the adiabatic compression of a dilute and interacting Classical Gas
Physical Review E, 2007Co-Authors: Gavin E Crooks, Christopher JarzynskiAbstract:We consider a simple, physically motivated model of a dilute Classical Gas of interacting particles, initially equilibrated with a heat bath, undergoing adiabatic and quasistatic compression or expansion. This provides an example of a thermodynamic process for which non-Gaussian work fluctuations can be computed exactly from microscopic principles. We find that the work performed during this process is described statistically by a gamma distribution, and we use this result to show that the model satisfies the nonequilibrium work and fluctuation theorems, but not a prediction based on linear response theory.
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On the work distribution for the adiabatic compression of a dilute Classical Gas
Lawrence Berkeley National Laboratory, 2006Co-Authors: Gavin E Crooks, Christopher JarzynskiAbstract:Author(s): Crooks, Gavin E.; Jarzynski, Christopher | Abstract: We consider the adiabatic and quasi-static compression of a dilute Classical Gas, confined in a piston and initially equilibrated with a heat bath. We find that the work performed during this process is described statistically by a gamma distribution. We use this result to show that the model satisfies the non-equilibrium work and fluctuation theorems, but not the fluctation-dissipation relation. We discuss the rare but dominant realizations that contribute most to the exponential average of the work, and relate our results to potentially universal work distributions.
D L Smith - One of the best experts on this subject based on the ideXlab platform.
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Quantitative study of spin noise spectroscopy in a Classical Gas of {sup 41}K atoms
Physical Review A, 2006Co-Authors: Bogdan Mihaila, S A Crooker, D G Rickel, Krastan B Blagoev, P B Littlewood, D L SmithAbstract:We present a general derivation of the electron spin noise power spectrum in alkali Gases as measured by optical Faraday rotation, which applies to both Classical Gases at high temperatures as well as ultracold quantum Gases. We show that the spin-noise power spectrum is determined by an electron spin-spin correlation function, and we find that measurements of the spin-noise power spectra for a Classical Gas of {sup 41}K atoms are in good agreement with the predicted values. Experimental and theoretical spin noise spectra are directly and quantitatively compared in both longitudinal and transverse magnetic fields up to the high magnetic-field regime (where Zeeman energies exceed the intrinsic hyperfine energy splitting of the {sup 41}K ground state)
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quantitative study of spin noise spectroscopy in a Classical Gas of sup 41 k atoms
Physical Review A, 2006Co-Authors: Bogdan Mihaila, S A Crooker, D G Rickel, Krastan B Blagoev, P B Littlewood, D L SmithAbstract:We present a general derivation of the electron spin noise power spectrum in alkali Gases as measured by optical Faraday rotation, which applies to both Classical Gases at high temperatures as well as ultracold quantum Gases. We show that the spin-noise power spectrum is determined by an electron spin-spin correlation function, and we find that measurements of the spin-noise power spectra for a Classical Gas of {sup 41}K atoms are in good agreement with the predicted values. Experimental and theoretical spin noise spectra are directly and quantitatively compared in both longitudinal and transverse magnetic fields up to the high magnetic-field regime (where Zeeman energies exceed the intrinsic hyperfine energy splitting of the {sup 41}K ground state)
S Stringari - One of the best experts on this subject based on the ideXlab platform.
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dynamics of a Classical Gas including dissipative and mean field effects
Physical Review A, 2003Co-Authors: P Pedri, David Gueryodelin, S StringariAbstract:By means of a scaling ansatz, we investigate an approximated solution of the Boltzmann-Vlasov equation for a Classical Gas. Within this framework, we derive the frequencies and the damping of the collective oscillations of a harmonically trapped Gas and we investigate its expansion after releasing of the trap. The method is well suited to study the collisional effects taking place in the system and in particular to discuss the crossover between the hydrodynamic and the collisionless regimes. An explicit link between the relaxation times relevant for the damping of the collective oscillations and for the expansion is established.
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collective oscillations of a Classical Gas confined in harmonic traps
Physical Review A, 1999Co-Authors: David Gueryodelin, F Zambelli, Jean Dalibard, S StringariAbstract:Starting from the Boltzmann equation, we calculate the frequency and the damping of the collective oscillations of a Classical Gas confined by a harmonic potential. Both the monopole and quadrupole modes are considered in the presence of spherical as well as axially deformed traps. The relaxation time is calculated using a Gaussian ansatz which explicitly accounts for the occurence of quadrupole deformations in velocity space. Our approach provides an explicit description of the transition between the hydrodynamic and collisionless regimes. The predictions are in very good agreement with the results of a molecular-dynamics simulation carried out in a Gas of hard spheres. @S1050-2947~99!02312-4#
Gavin E Crooks - One of the best experts on this subject based on the ideXlab platform.
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work distribution for the adiabatic compression of a dilute and interacting Classical Gas
Physical Review E, 2007Co-Authors: Gavin E Crooks, Christopher JarzynskiAbstract:We consider a simple, physically motivated model of a dilute Classical Gas of interacting particles, initially equilibrated with a heat bath, undergoing adiabatic and quasistatic compression or expansion. This provides an example of a thermodynamic process for which non-Gaussian work fluctuations can be computed exactly from microscopic principles. We find that the work performed during this process is described statistically by a gamma distribution, and we use this result to show that the model satisfies the nonequilibrium work and fluctuation theorems, but not a prediction based on linear response theory.
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On the work distribution for the adiabatic compression of a dilute Classical Gas
Lawrence Berkeley National Laboratory, 2006Co-Authors: Gavin E Crooks, Christopher JarzynskiAbstract:Author(s): Crooks, Gavin E.; Jarzynski, Christopher | Abstract: We consider the adiabatic and quasi-static compression of a dilute Classical Gas, confined in a piston and initially equilibrated with a heat bath. We find that the work performed during this process is described statistically by a gamma distribution. We use this result to show that the model satisfies the non-equilibrium work and fluctuation theorems, but not the fluctation-dissipation relation. We discuss the rare but dominant realizations that contribute most to the exponential average of the work, and relate our results to potentially universal work distributions.
Bogdan Mihaila - One of the best experts on this subject based on the ideXlab platform.
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Quantitative study of spin noise spectroscopy in a Classical Gas of {sup 41}K atoms
Physical Review A, 2006Co-Authors: Bogdan Mihaila, S A Crooker, D G Rickel, Krastan B Blagoev, P B Littlewood, D L SmithAbstract:We present a general derivation of the electron spin noise power spectrum in alkali Gases as measured by optical Faraday rotation, which applies to both Classical Gases at high temperatures as well as ultracold quantum Gases. We show that the spin-noise power spectrum is determined by an electron spin-spin correlation function, and we find that measurements of the spin-noise power spectra for a Classical Gas of {sup 41}K atoms are in good agreement with the predicted values. Experimental and theoretical spin noise spectra are directly and quantitatively compared in both longitudinal and transverse magnetic fields up to the high magnetic-field regime (where Zeeman energies exceed the intrinsic hyperfine energy splitting of the {sup 41}K ground state)
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quantitative study of spin noise spectroscopy in a Classical Gas of sup 41 k atoms
Physical Review A, 2006Co-Authors: Bogdan Mihaila, S A Crooker, D G Rickel, Krastan B Blagoev, P B Littlewood, D L SmithAbstract:We present a general derivation of the electron spin noise power spectrum in alkali Gases as measured by optical Faraday rotation, which applies to both Classical Gases at high temperatures as well as ultracold quantum Gases. We show that the spin-noise power spectrum is determined by an electron spin-spin correlation function, and we find that measurements of the spin-noise power spectra for a Classical Gas of {sup 41}K atoms are in good agreement with the predicted values. Experimental and theoretical spin noise spectra are directly and quantitatively compared in both longitudinal and transverse magnetic fields up to the high magnetic-field regime (where Zeeman energies exceed the intrinsic hyperfine energy splitting of the {sup 41}K ground state)