搜索结果: 31-45 共查到“知识库 低温物理学”相关记录60条 . 查询时间(2.383 秒)
Growth dynamics of a Bose-Einstein condensate in a dimple trap without cooling
Growth dynamics dimple trap without cooling
2010/11/17
We study the formation of a Bose-Einstein condensate in a cigar-shaped three-dimensional harmonic trap,induced by the controlled addition of an attractive “dimple” potential along the weak axis. In th...
Finite temperature QCD at fixed Q with overlap fermions
Finite temperature QCD fixed Q overlap fermions
2011/1/13
We present some preliminary results of the project on finite temperature QCD with overlap fermions at KEK.We performed a series of simulations to assess the effects of fixing the topological sector at...
Spin-Wave Spectrum in `Single-Domain' Magnetic Ground State of Triangular Lattice Antiferromagnet CuFeO2
CuFeO2 spin wave spin frustration inelastic neutron scattering
2010/11/22
By means of neutron scattering measurements, we have investigated spin-wave excitation in
a collinear four-sublattice (4SL) magnetic ground state of a triangular lattice antiferromagnet
CuFeO2, whic...
The full evolution during the late periods of the condensation process is described in the analytical form. The process is split into several periods and for every period the simple approximate soluti...
30 kV coaxial vacuum-tight feedthrough for operation at cryogenic temperatures
HV feedthrough Cryogenic detectors Liquid Argon TPC
2011/1/5
In this paper we describe the technology of building a vacuum-tight high voltage feedthrough which is able to operate at voltages up to 30 kV. The feedthrough has a coaxial structure
with a grounded ...
QCD transition temperature: full staggered result
QCD transition temperature full staggered result
2011/1/14
We conclude our investigations on the QCD cross-over transition temperatureswith 2+1 staggered
flavours and one-link stout improvement. We extend our previous two studies [Phys. Lett. B643
(2006) 46...
Low-temperature thermodynamics of the unitary Fermi gas: superfluid fraction, first sound and second sound
Low-temperature thermodynamics of the unitary Fermi gas superfluid fraction first sound second sound
2011/1/10
We investigate the low-temperature thermodynamics of the unitary Fermi gas by introducing a
model based on the zero-temperature spectra of both bosonic collective modes and fermonic singleparticle ex...
Ab initio modeling of Bose-Einstein condensation in Pb2V3O9
initio modeling Bose-Einstein condensation in Pb2V3O9
2010/11/24
We apply density functional theory band structure calculations and quantum Monte Carlo sim-
ulations to investigate the Bose-Einstein condensation in the spin- 12 quantum magnet Pb2V3O9.
In contrast...
Phase diffusion of a two-component Bose-Einstein condensates: exact and short-time solutions for arbitrary coherent spin state
two-component Bose-Einstein condensates arbitrary coherent spin state
2010/11/23
We investigate phase diffusion of a two-component Bose-Einstein condensates prepared initially in arbitrary coherent spin state |θ0, φ0i. Analytical expression of the phase-diffusion time is presented...
Crystalline phase for one-dimensional ultra-cold atomic bosons
Crystalline phase one-dimensional ultra-cold atomic bosons
2010/10/27
We study cold atomic gases with a contact interaction and confined into one-dimension. Crossing
the confinement induced resonance the correlation between the bosons increases, and introduces an effec...
本文将定域规范不变的平均场方法由分立的阿贝尔群情况推广至非阿贝尔连续群情况, 计算了SU(2)Yang-Mills场和Higgs场耦合系统的相图.
对称裂变的变形过程和输运过程统一描述
输运过程 变形过程 对称裂变
2009/8/13
基于对称裂变变形过程的描述, 本文讨论了双心壳层模型平均场的演化问题, 并提出了对称裂变变形过程和输运过程的统一描述方法.
格点规范理论的平均场研究与普适性讨论
普适性 平均场 格点规范理论
2009/8/12
我们利用朴素的平均场近似方法与Shahbazyan提出的方法研究了格点规范理论的Manton作用量和其他几种作用量. 用平均场方法计算了几种SU(2)格点规范作用量的过渡点的β值, 用Shahbazyan提出的方法, 假设普适性存在, 直接由SU(2) Wilson作用量的Monte确良Carlo结果和几种作用量与Wilson作用量的关系, 得到这几种作用量过渡点的β值. 最后, 我们对用两种方法...