The Experts below are selected from a list of 273 Experts worldwide ranked by ideXlab platform
Luming Duan - One of the best experts on this subject based on the ideXlab platform.
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Phase-Sensitive Detection for unconventional Bose-Einstein condensation
Physical Review A, 2012Co-Authors: Zi Cai, Luming DuanAbstract:We propose a Phase-Sensitive Detection scheme to identify the unconventional ${p}_{x}\ifmmode\pm\else\textpm\fi{}i{p}_{y}$ symmetry of the condensate wave functions of bosons, which have already been proposed and realized in high bands in optical lattices. Using the impulsive Raman operation combined with time-of-flight imaging, the off-diagonal correlation functions in momentum space give rise to the relative phase information between different components of condensate wave functions. This scheme is robust against the interaction and interband effects, and provides evidence of unconventional Bose-Einstein condensations with nontrivial condensation symmetries.
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Phase-Sensitive Detection for Unconventional Bose-Einstein Condensations
Bulletin of the American Physical Society, 2012Co-Authors: Zi Cai, Luming DuanAbstract:We propose a Phase-Sensitive Detection scheme to identify the unconventional px ± ipy symmetry of the condensate wavefunctions of bosons, which have already been proposed and realized in high bands in optical lattices. Using the impulsive Raman operation combining with time-of-flight imaging, the off-diagonal correlation functions in momentum space give rise to the relative phase information between different components of condensate wavefunctions. This scheme is robust against the interaction and interband effects, and provides smoking gun evidence for unconventional Bose-Einstein condensations with nontrivial condensation symmetries.
Zi Cai - One of the best experts on this subject based on the ideXlab platform.
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Phase-Sensitive Detection for unconventional Bose-Einstein condensation
Physical Review A, 2012Co-Authors: Zi Cai, Luming DuanAbstract:We propose a Phase-Sensitive Detection scheme to identify the unconventional ${p}_{x}\ifmmode\pm\else\textpm\fi{}i{p}_{y}$ symmetry of the condensate wave functions of bosons, which have already been proposed and realized in high bands in optical lattices. Using the impulsive Raman operation combined with time-of-flight imaging, the off-diagonal correlation functions in momentum space give rise to the relative phase information between different components of condensate wave functions. This scheme is robust against the interaction and interband effects, and provides evidence of unconventional Bose-Einstein condensations with nontrivial condensation symmetries.
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Phase-Sensitive Detection for Unconventional Bose-Einstein Condensations
Bulletin of the American Physical Society, 2012Co-Authors: Zi Cai, Luming DuanAbstract:We propose a Phase-Sensitive Detection scheme to identify the unconventional px ± ipy symmetry of the condensate wavefunctions of bosons, which have already been proposed and realized in high bands in optical lattices. Using the impulsive Raman operation combining with time-of-flight imaging, the off-diagonal correlation functions in momentum space give rise to the relative phase information between different components of condensate wavefunctions. This scheme is robust against the interaction and interband effects, and provides smoking gun evidence for unconventional Bose-Einstein condensations with nontrivial condensation symmetries.
K. T. Nihei - One of the best experts on this subject based on the ideXlab platform.
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frequency response modelling of seismic waves using finite difference time domain with phase sensitive Detection td psd
Geophysical Journal International, 2007Co-Authors: K. T. NiheiAbstract:SUMMARY This paper describes an efficient approach for computing the frequency response of seismic waves propagating in 2- and 3-D earth models within which the magnitude and phase are required at many locations. The approach consists of running an explicit finite difference time domain (TD) code with a time harmonic source out to steady-state. The magnitudes and phases at locations in the model are computed using phase sensitive Detection (PSD). PSD does not require storage of time-series (unlike a fast Fourier transform), reducing its memory requirements. Additionally, the response from multiple sources can be obtained from a single finite difference run by encoding each source with a different frequency. For 2-D models with many sources, this time domain phase sensitive Detection (TD–PSD) approach has a higher arithmetic complexity than direct solution of the finite difference frequency domain (FD) equations using nested dissection re-ordering (FD–ND). The storage requirements for 2-D finite difference TD–PSD are lower than FD–ND. For 3-D finite difference models, TD–PSD has significantly lower arithmetic complexity and storage requirements than FD–ND, and therefore, may prove useful for computing the frequency response of large 3-D earth models.
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Frequency Response Modeling of Seismic Waves Using Finite Difference Time Domain with Phase Sensitive Detection (TD-PSD)
69th EAGE Conference and Exhibition incorporating SPE EUROPEC 2007, 2007Co-Authors: K. T. NiheiAbstract:P322 Frequency Response Modeling of Seismic Waves Using Finite Difference Time Domain with Phase Sensitive Detection (TD-PSD) K.T. Nihei* (Chevron Energy Technology Co.) & X. Li (Lawrence Berkeley National Laborator) SUMMARY We examine an alternative approach for computing the frequency response of a heterogeneous anisotropic viscoelastic medium. The approach consists of running an explicit finite difference time domain (TD) code with a harmonic wave source out to steady-state and then extracting the magnitude and phase from the transient data via phase sensitive Detection (PSD). The PSD algorithm requires integration over a single cycle of the waveform to obtain accurate phase
Akira Furusawa - One of the best experts on this subject based on the ideXlab platform.
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All-optical Phase-Sensitive Detection for ultra-fast quantum computation
Optics express, 2020Co-Authors: Naoto Takanashi, Asuka Inoue, Takahiro Kashiwazaki, Takushi Kazama, Koji Enbutsu, Ryoichi Kasahara, Takeshi Umeki, Akira FurusawaAbstract:Phase-Sensitive Detection is the essential projective measurement for measurement-based continuous-variable quantum information processing. The bandwidth of conventional electrical Phase-Sensitive detectors is up to several gigahertz, which would limit the speed of quantum computation. It is theoretically proposed to realize terahertz-order Detection bandwidth by using all-optical Phase-Sensitive Detection with an optical parametric amplifier (OPA). However, there have been experimental obstacles to achieve large parametric gain for continuous waves, which is required for use in quantum computation. Here, we adopt a fiber-coupled $\chi^{(2)}$ OPA made of a periodically poled LiNbO${}_{3}$ waveguide with high durability for intense continuous-wave pump light. Thanks to that, we manage to detect quadrature amplitudes of broadband continuous-wave squeezed light. 3 dB of squeezing is measured up to 3 THz of sideband frequency with an optical spectrum analyzer. Furthermore, we demonstrate the phase-locking and dispersion compensation of the broadband continuous-wave squeezed light, so that the phase of the squeezed light is maintained over 1 THz. The ultra-broadband continuous-wave Detection method and dispersion compensation would help to realize all-optical quantum computation with over-THz clock frequency.
Theo Rasing - One of the best experts on this subject based on the ideXlab platform.
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Phase-Sensitive Detection TECHNIQUE FOR SURFACE NONLINEAR OPTICS
Physical Review B, 1998Co-Authors: K.j. Veenstra, Andrei V. Petukhov, A.p. De Boer, Theo RasingAbstract:We have developed a simple technique to measure the phase of the weak surface optical second-harmonic response to excitation with femtosecond laser pulses that uses the principle of spectral interference. This approach is necessary for the study of surfaces under (ultrahigh) vacuum conditions, where the conventional method fails due to the dispersion in optical windows. As a demonstration, we have applied the technique to clean Ni(110) in UHV and to a Rh/Co/Cu multilayer in air. We have determined the phase with an accuracy of 5$\ifmmode^\circ\else\textdegree\fi{}$ which is comparable to the conventional method.
