Continuous unitary transformations in two-level boson systems

Details Continuous unitary transformations in two-level boson systems Continuous unitary transformations in two-level boson systems

2005-09-28

arxiv.org/abs/cond-mat/0509721v3

Phys. Rev. C 72, 064332 (2005)

Physics

Condensed Matter

Statistical Mechanics

27 pages, 16 figures, published version

Scientific paper

10.1103/PhysRevC.72.064332

Two-level boson systems displaying a quantum phase transition from a spherical (symmetric) to a deformed (broken) phase are studied. A formalism to diagonalize Hamiltonians with $O(2L+1)$ symmetry for large number of bosons is worked out. Analytical results beyond the simple mean-field treatment are deduced by using the continuous unitary transformations technique. In this scheme, a 1/N expansion for different observables is proposed and allows one to compute the finite-size scaling exponents at the critical point. Analytical and numerical results are compared and reveal the power of the present approach to compute the finite-size corrections in such a context.

Affiliated with

Also associated with

No associations

Rating

Continuous unitary transformations in two-level boson systems does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Continuous unitary transformations in two-level boson systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Continuous unitary transformations in two-level boson systems will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-239636