scholarly journals Josephson junction formed in the wormhole space-time from the analysis of the critical temperature of BEC

2021 ◽  
Vol 81 (12) ◽  
Author(s):  
Shingo Takeuchi
Keyword(s):  
Critical Temperature ◽  
Josephson Junction ◽  
Space Time ◽  
Einstein Condensate ◽  
Exotic Matter ◽  
Traversable Wormhole ◽  
Bose Einstein Condensate ◽  
Bose Einstein

AbstractIn this study, we consider a gas in the Morris–Thorne traversable wormhole space-time, and analyze the critical temperature of the Bose-Einstein condensate in the vicinity of its throat. Our results show that it is equal to zero. Then, from this result, we point out that a state analogous to the Josephson junction is always formed at any temperature in the vicinity of its throat. This is of interest as a gravitational phenomenology. Of course, there is the problem of the exotic matter, but we perform this work without treating it.

Critical temperature of a Bose–Einstein condensate in a 3D non-cubic optical lattice

2010 ◽  
Vol 405 (23) ◽  
pp. 4768-4771 ◽  
Author(s):  
Ahmed S. Hassan ◽  
Azza M. El-Badry ◽  
Shemi S.M. Soliman
Keyword(s):  
Critical Temperature ◽  
Optical Lattice ◽  
Einstein Condensate ◽  
Bose Einstein Condensate ◽  
Bose Einstein

scholarly journals Bose polarons near quantum criticality

Science ◽  
2020 ◽  
Vol 368 (6487) ◽  
pp. 190-194 ◽  
Author(s):  
Zoe Z. Yan ◽  
Yiqi Ni ◽  
Carsten Robens ◽  
Martin W. Zwierlein
Keyword(s):  
Critical Temperature ◽  
Quantum Critical Point ◽  
Spectral Width ◽  
Quantum Criticality ◽  
Einstein Condensate ◽  
Resonant Interactions ◽  
Bose Einstein Condensate ◽  
Modern Physics ◽  
Quantum Critical ◽  
Bose Einstein

The emergence of quasiparticles in interacting matter represents one of the cornerstones of modern physics. However, in the vicinity of a quantum critical point, the existence of quasiparticles comes under question. Here, we created Bose polarons near quantum criticality by immersing atomic impurities in a Bose-Einstein condensate (BEC) with near-resonant interactions. Using radiofrequency spectroscopy, we probed the energy, spectral width, and short-range correlations of the impurities as a function of temperature. Far below the superfluid critical temperature, the impurities formed well-defined quasiparticles. Their inverse lifetime, given by their spectral width, increased linearly with temperature at the so-called Planckian scale, consistent with quantum critical behavior. Close to the BEC critical temperature, the spectral width exceeded the impurity’s binding energy, signaling a breakdown of the quasiparticle picture.

scholarly journals Five-Loop Critical Temperature Shift in Weakly Interacting Homogeneous Bose–Einstein Condensate

2003 ◽  
Vol 17 (19) ◽  
pp. 1011-1020 ◽  
Author(s):  
H. Kleinert
Keyword(s):  
Critical Temperature ◽  
Particle Density ◽  
Scattering Length ◽  
Temperature Shift ◽  
Einstein Condensate ◽  
Monte Carlo Result ◽  
Bose Einstein Condensate ◽  
Variational Perturbation Theory ◽  
Variational Perturbation ◽  
Bose Einstein

Using variational perturbation theory, we calculate the shift in the critical temperature Tcup to five loops to lowest order in the scattering length a and find [Formula: see text], where n is the particle density. Our result is slightly lower than the latest Monte Carlo result (1.32±0.02) an1/3.

scholarly journals Quantum top inside a Bose-Einstein-condensate Josephson junction

2007 ◽  
Vol 75 (5) ◽  
Author(s):  
Ingrid Bausmerth ◽  
Uwe R. Fischer ◽  
Anna Posazhennikova
Keyword(s):  
Josephson Junction ◽  
Einstein Condensate ◽  
Bose Einstein Condensate ◽  
Bose Einstein

scholarly journals Dynamics of a space-time crystal in an atomic Bose-Einstein condensate

2019 ◽  
Vol 99 (1) ◽  
Author(s):  
L. Liao ◽  
J. Smits ◽  
P. van der Straten ◽  
H. T. C. Stoof
Keyword(s):  
Space Time ◽  
Einstein Condensate ◽  
Bose Einstein Condensate ◽  
Bose Einstein

PROBABILITY DISTRIBUTION OF THE PHASE OF A BOSE–EINSTEIN CONDENSATE

2004 ◽  
Vol 18 (04) ◽  
pp. 129-136
Author(s):  
SHUJUAN LIU ◽  
HONGWEI XIONG ◽  
LEI WANG
Keyword(s):  
Critical Temperature ◽  
Probability Distribution ◽  
Diffusion Process ◽  
Particle Number ◽  
Einstein Condensate ◽  
Collective Excitations ◽  
Phase Diffusion ◽  
Bose Einstein Condensate ◽  
Bose Einstein

For temperatures far below the critical temperature, the probability distribution of the phase of a Bose–Einstein condensate is investigated for the phase diffusion process due to collective excitations spontaneously created from the condensate. Our results show that the phase diffusion decreases with the increasing of the particle number in the condensate.

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