scholarly journals Fermi-Pasta-Ulam phenomena and persistent breathers in the harmonic trap

2021 ◽  
Vol 104 (3) ◽  
Author(s):  
Anxo Biasi ◽  
Oleg Evnin ◽  
Boris A. Malomed
Keyword(s):  
Harmonic Trap

scholarly journals Dynamics of the Creation of a Rotating Bose–Einstein Condensation by Two Photon Raman Transition Using a Laguerre–Gaussian Laser Pulse

Atoms ◽  
2021 ◽  
Vol 9 (1) ◽  
pp. 14
Author(s):  
Koushik Mukherjee ◽  
Soumik Bandyopadhyay ◽  
Dilip Angom ◽  
Andrew M. Martin ◽  
Sonjoy Majumder
Keyword(s):  
Interaction Strength ◽  
Transition Process ◽  
Laser Pulses ◽  
Harmonic Trap ◽  
Einstein Condensation ◽  
Raman Transition ◽  
Two Photon ◽  
Final Population ◽  
The Creation ◽  
Bose Einstein

We present numerical simulations to unravel the dynamics associated with the creation of a vortex in a Bose–Einstein condensate (BEC), from another nonrotating BEC using two-photon Raman transition with Gaussian (G) and Laguerre–Gaussian (LG) laser pulses. In particular, we consider BEC of Rb atoms at their hyperfine ground states confined in a quasi two dimensional harmonic trap. Optical dipole potentials created by G and LG laser pulses modify the harmonic trap in such a way that density patterns of the condensates during the Raman transition process depend on the sign of the generated vortex. We investigate the role played by the Raman coupling parameter manifested through dimensionless peak Rabi frequency and intercomponent interaction on the dynamics during the population transfer process and on the final population of the rotating condensate. During the Raman transition process, the two BECs tend to have larger overlap with each other for stronger intercomponent interaction strength.

BOSE–EINSTEIN STATISTICS IN A DISCRETE SPECTRUM TRAP

2004 ◽  
Vol 18 (04n05) ◽  
pp. 555-563 ◽  
Author(s):  
ENRICO CELEGHINI ◽  
MARIO RASETTI
Keyword(s):  
Critical Temperature ◽  
Low Temperature ◽  
Specific Heat ◽  
Discrete Spectrum ◽  
Harmonic Trap ◽  
Statistical Properties ◽  
Bose Einstein ◽  
The Continuum

A detailed description of the statistical properties of a system of bosons in a harmonic trap at low temperature, which is expected to bear on the process of BE condensation, is given resorting only to the basic postulates of Gibbs and Bose, without assuming equipartition nor continuum statistics. Below Tc such discrete spectrum theory predicts for the thermo-dynamical variables a behavior different from the continuum case. In particular a new critical temperature Td emerges where the specific heat exhibits a λ-like spike.

scholarly journals Mesoscopic Fermi gas in a harmonic trap

1998 ◽  
Vol 57 (2) ◽  
pp. 1253-1259 ◽  
Author(s):  
J. Schneider ◽  
H. Wallis
Keyword(s):  
Fermi Gas ◽  
Harmonic Trap

scholarly journals Dynamics and decoherence of two cold bosons in a one-dimensional harmonic trap

2010 ◽  
Vol 82 (5) ◽  
Author(s):  
Tomasz Sowiński ◽  
Mirosław Brewczyk ◽  
Mariusz Gajda ◽  
Kazimierz Rzążewski
Keyword(s):  
Harmonic Trap ◽  
One Dimensional

scholarly journals Four fermions in a one-dimensional harmonic trap: Accuracy of a variational-ansatz approach

2017 ◽  
Vol 95 (5) ◽  
Author(s):  
D. Pęcak ◽  
A. S. Dehkharghani ◽  
N. T. Zinner ◽  
T. Sowiński
Keyword(s):  
Harmonic Trap ◽  
One Dimensional ◽  
Ansatz Approach
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