2012/03/02 by Anatoly Kuklov, Kuklov, Anatoly, Alexei Tsvelik +1 · 1 citation
Physics and Astronomy · #FOS: Physical sciences #Quantum Gases (cond-mat.quant-gas) #cond-mat.quant-gas
paper · pdf · doi:10.48550/arxiv.1203.0351
revised version: typos corrected, detailed explanations and references added
arxiv created 2012/03/27 · arxiv updated 2012/03/28
We analyze the nature of quantum phase transition to a superfluid state of flexible chains in a gas of polar bosonic molecules confined in a stack of N identical 1d ("cigar" type) optical lattice layers and polarized perpendicularly to the layers. Monte Carlo simulations within the J-current model show that, in the absence of the inter-tube tunneling, the transition to the N-layered superfluid is in the Berezinskii-Kosterlitz-Thouless universality class in the one-particle density matrix channel. The inter-layer tunneling changes it to the q=N 2d Potts universality. The low energy field descriptions of the transition are discussed in terms of conformal field theories.