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Jul
2
awarded  Inquisitive
Jul
2
awarded  Curious
Jun
27
asked How to distinguish Bose glass and superfluid phases in a harmonic trap?
Jun
24
awarded  Popular Question
Jun
13
asked Condensate fraction and momentum distribution in cold atom experiments
May
13
accepted Sign of the hopping integral in tight binding model
Apr
28
asked Condensate fraction and single-particle density matrix
Feb
27
revised Experimental Measurement of Quantum phase transition in an optical lattice
added 81 characters in body; edited title
Feb
19
comment Griffiths phase
Why is Bose glass a Griffiths phase?
Feb
18
revised Theorem of inclusion in the disordered Bose-Hubbard model
edited tags
Feb
17
asked Theorem of inclusion in the disordered Bose-Hubbard model
Feb
7
comment Why Landau Level quantization is observed only in low temperature and strong magnetic field in real experiment?
@EverettYou can composite fermion understood by the charge attaching magnetic flux filled in the lowest Landau level?
Feb
7
asked Experimental Measurement of Quantum phase transition in an optical lattice
Feb
7
comment What is the difference between atomic limit and hard core boson limit?
In hard-core limit Hamiltonian, the interaction term can vanish, but one has to use the constraint n=0 or 1, and the Hilbert space will be truncated.
Feb
6
comment What is the difference between atomic limit and hard core boson limit?
Why is the chemical potential fixed to $U/2$ in hard core bosons?
Feb
5
revised What is the difference between atomic limit and hard core boson limit?
added 9 characters in body; edited title
Feb
5
asked What is the difference between atomic limit and hard core boson limit?
Dec
7
awarded  Popular Question
Nov
22
asked How to realize long-range interaction of colds atom in an optical lattice?
Nov
21
comment Some conceptual questions in BEC
:You are right. I am talking the BEC in context of cold atoms in an optical lattice. Each boson condenses to the zero momentum state, so the ground state can be described by $(b_{k=0}^{\dagger})^{N}|0\rangle$. In each lattice site, the many-body wave function is a coherent state, so the ground state can be described by a product of single-site states over the entire lattice $\prod_{i}|\Phi\rangle_{i}$