Quasi-energy of single quantum particles and a Bose-Einstein condensate in a dynamical trap

2014 ◽  
Vol 118 (1) ◽  
pp. 124-132 ◽  
Author(s):  
N. N. Rozanov ◽  
G. B. Sochilin
Keyword(s):  
Einstein Condensate ◽  
Single Quantum ◽  
Bose Einstein Condensate ◽  
Quantum Particles ◽  
Bose Einstein

Polariton Bose–Einstein condensate with spatially periodic interaction

2019 ◽  
Vol 33 (31) ◽  
pp. 1950382
Author(s):  
Lei Chen ◽  
Xingran Xu ◽  
Shuai Kang ◽  
Zhaoxin Liang
Keyword(s):  
Rate Equation ◽  
Feshbach Resonance ◽  
Scattering Length ◽  
Einstein Condensate ◽  
Single Quantum ◽  
Single Quantum Well ◽  
Spin Degree ◽  
Bose Einstein Condensate ◽  
Spatially Periodic ◽  
Bose Einstein

Recently, there are several experiments demonstrating the possibility to tune the interaction constants using biexcitonic Feshbach resonance in resonantly created polariton condensate and single quantum well. Motivated by these experiments, we theoretically study the stationary state of a polariton condensate whose interatomic scattering length is periodically modulated with optical Feshbach resonance, which represents a novel kind of non-equilibrium superfluidity. In more detail, the spontaneous symmetry breaking of the spin degree of freedom induced by different loss rates of the linear polarizations are investigated based on driven-dissipative Gross–Pitaevskii equations coupled to the rate equation of a reservoir.

scholarly journals Transport of a Single Cold Ion Immersed in a Bose-Einstein Condensate

2021 ◽  
Vol 126 (3) ◽  
Author(s):  
T. Dieterle ◽  
M. Berngruber ◽  
C. Hölzl ◽  
R. Löw ◽  
K. Jachymski ◽  
...  
Keyword(s):  
Einstein Condensate ◽  
Bose Einstein Condensate ◽  
Bose Einstein

scholarly journals Ultrafast electron cooling in an expanding ultracold plasma

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Tobias Kroker ◽  
Mario Großmann ◽  
Klaus Sengstock ◽  
Markus Drescher ◽  
Philipp Wessels-Staarmann ◽  
...  
Keyword(s):  
Theoretical Models ◽  
Einstein Condensate ◽  
Direct Access ◽  
Electron Cooling ◽  
Plasma Dynamics ◽  
Strongly Coupled ◽  
Bose Einstein Condensate ◽  
Ultracold Plasma ◽  
Strongly Coupled Plasma ◽  
Bose Einstein

AbstractPlasma dynamics critically depends on density and temperature, thus well-controlled experimental realizations are essential benchmarks for theoretical models. The formation of an ultracold plasma can be triggered by ionizing a tunable number of atoms in a micrometer-sized volume of a 87Rb Bose-Einstein condensate (BEC) by a single femtosecond laser pulse. The large density combined with the low temperature of the BEC give rise to an initially strongly coupled plasma in a so far unexplored regime bridging ultracold neutral plasma and ionized nanoclusters. Here, we report on ultrafast cooling of electrons, trapped on orbital trajectories in the long-range Coulomb potential of the dense ionic core, with a cooling rate of 400 K ps−1. Furthermore, our experimental setup grants direct access to the electron temperature that relaxes from 5250 K to below 10 K in less than 500 ns.

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