2011/01/31 by Adrian Del Maestro, Massimo Boninsegni, Ian Affleck
Physics and Astronomy · #cond-mat.stat-mech #cond-mat.other
paper · pdf · doi:10.1103/physrevlett.106.105303
published as Phys. Rev. Lett. 106, 105303 (2011) · 4 pages, 3 figures; revised version fixes a typo in the sign of the chemical potential on page 2 and a mislabeling of the values of K assigned to relevant disorder and periodic potentials on page 4
arxiv created 2011/06/19 · arxiv updated 2011/06/21
We study the low temperature properties of a helium-4 fluid confined in nanopores, using large-scale Quantum Monte Carlo simulations with realistic He-He and He-pore interactions. In the narrow-pore limit, the system can be described by the quantum hydrodynamic theory known as Luttinger liquid theory with a large Luttinger parameter, corresponding to the dominance of solid tendencies and strong susceptibility to pinning by a periodic or random potential from the pore walls. On the other hand, for wider pores, the central region appears to behave like a Luttinger liquid with a smaller Luttinger parameter, and may be protected from pinning by the wall potential, offering the possibility of experimental detection of a Luttinger liquid.