Absence of a Direct Superfluid to Mott Insulator Transition in Disordered Bose Systems

Details Absence of a Direct Superfluid to Mott Insulator Transition in Disordered Bose Systems Absence of a Direct Superfluid to Mott Insulator Transition in Disordered Bose Systems

2009-03-23

arxiv.org/abs/0903.3867v2

Phys. Rev. Lett. 103, 140402 (2009)

Physics

Condensed Matter

Statistical Mechanics

4 pages, 3 figures; replaced with resubmitted version

Scientific paper

We prove the absence of a direct quantum phase transition between a superfluid and a Mott insulator in a bosonic system with generic, bounded disorder. We also prove compressibility of the system on the superfluid--insulator critical line and in its neighborhood. These conclusions follow from a general {\it theorem of inclusions} which states that for any transition in a disordered system one can always find rare regions of the competing phase on either side of the transition line. Quantum Monte Carlo simulations for the disordered Bose-Hubbard model show an even stronger result, important for the nature of the Mott insulator to Bose glass phase transition: The critical disorder bound, $\Delta_c$, corresponding to the onset of disorder-induced superfluidity, satisfies the relation $\Delta_c > E_{\rm g/2}$, with $E_{\rm g/2}$ the half-width of the Mott gap in the pure system.

Affiliated with

Also associated with

No associations

Rating

Absence of a Direct Superfluid to Mott Insulator Transition in Disordered Bose 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 Absence of a Direct Superfluid to Mott Insulator Transition in Disordered Bose Systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Absence of a Direct Superfluid to Mott Insulator Transition in Disordered Bose Systems will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-346878