Tagged Questions
5
votes
1answer
74 views
Why is the BCS trial function valid across the BEC-BCS crossover?
In one of the two main theoretical approaches used in describing ultracold Fermi gases and the BEC-BCS crossover, the so-called BCS-Leggett approach, the starting point is the BCS trial wavefunction:
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2
votes
3answers
141 views
Bose-Einstein condensation in systems with a degenerate ground state
I understand that when a system enters the BEC phase a sizable fraction of the total number of particles enters the ground state, until at some point almost all of your particles are in the ground ...
2
votes
3answers
246 views
Looking for a complete review of the BEC-BCS crossover
I'm looking for comprehensive review of the BEC-BCS crossover, both from a theoretical point of view, and from a experimental one. Even something at textbook level, but exhaustive, would be OK, but I ...
2
votes
2answers
286 views
Has Bose-Einstein theory been considered for dark matter?
Has Bose-Einstein theory been considered for dark matter?
The theory would explain why no measurable radiation is emitted due to zero temperature--its lack of interaction with other matter and its ...
2
votes
1answer
163 views
True Ground State Population of Ideal Bose-Einstein Condensate at Critical Temperature
I'm supposed to demonstrate that although we make the assumption in an ideal BEC that the ground state population follows
$N_0 = N\left[1-\left(\frac{T}{T_c}\right)^{3/2}\right]$
in reality the true ...
5
votes
1answer
323 views
Expansion of multi-particle state vector as a sum of n-entangled states
Physically, quantum entanglement is ranged from full long-range entanglement (Bose-Einstein condensate), described by a basis of states that look like this:
$$ |\Psi\rangle = |\phi_{i_{0} i_{1} ... ...
9
votes
2answers
924 views
trying to understand Bose-Einstein Condensate (BEC)
I am a computer scientist interested in network theory. I have come across the Bose-Einstein Condensate (BEC) because of its connections to complex networks. What I know about condensation is the ...
7
votes
4answers
727 views
Bose-Einstein condensate in 1D
I've read that for a Bose-Einstein gas in 1D there's no condensation. Why this happenes? How can I prove that?
2
votes
2answers
170 views
existing bounds on maximum density achieved by a Bose condensate
As we know, fermions are subject to exchange interactions that limit the densities they can achieve. However bosons (simple or composite) are not constrained by this, which implies physical phenomena ...
6
votes
4answers
5k views
Practical applications for a Bose-Einstein condensate
What are the main practical applications that a Bose-Einstein condensate can have?
