Quantum kinetic theory. IV. Intensity and amplitude fluctuations of a Bose-Einstein condensate at finite temperature including trap loss
نویسندگان
چکیده
منابع مشابه
Fluctuations of Bose-Einstein Condensate
The recent achievement of Bose-Einstein condensation (BEC) in trapped atoms of dilute gases [1–3] has been quickly followed by the quantitative measurements of the condensate’s properties. In particular the dependence of the fraction of atoms in the condensate on the temperature has been found to be in agreement with the theory of the noninteracting Bose gas in a harmonic trap [4]. From the poi...
متن کاملDipolar Bose-Einstein condensates at finite temperature
We study a Bose-Einstein condensate of a dilute gas with dipolar interactions, at finite temperature, using the Hartree-Fock-Bogoliubov theory within the Popov approximation. An additional approximation involving the dipolar exchange interaction is made to facilitate the computation. We calculate the temperature dependence of the condensate fraction of a condensate confined in a cylindrically s...
متن کاملDynamics of a Bose-einstein Condensate in an Anharmonic Trap
We present a theoretical model to describe the dynamics of a Bose-Einstein condensates in an-harmonic trapping potentials. The center of mass motion is separated from the internal condensate dynamics and the problem is reduced to the well known scaling solutions for the Thomas-Fermi radii. We discuss the validity of this approach and analyze the model for an anharmonic waveguide geometry which ...
متن کاملAmplification of fluctuations in a spinor Bose-Einstein condensate
Dynamical instabilities in a Rb F=1 spinor Bose-Einstein condensate are used as a parametric amplifier of quantum spin fluctuations. We demonstrate the spectrum of this amplifier to be tunable, in quantitative agreement with theory. We quantify the microscopic spin fluctuations of the initially paramagnetic condensate by applying this amplifier and measuring the resulting macroscopic magnetizat...
متن کاملQuantum Corrections to a Static Bose-Einstein Condensate at Zero Temperature
A previous calculation of the leading corrections from quantum field fluctuations to the ground state of a trapped Bose-Einstein condensate at zero temperature is extended to general time-independent states, including vortex states. The calculation is streamlined by using dimensional regularization to regularize both ultraviolet and infrared divergences. We calculate the leading quantum correct...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review A
سال: 1998
ISSN: 1050-2947,1094-1622
DOI: 10.1103/physreva.58.1450