Path Integral Ground State study of 2D solid 4He

Details Path Integral Ground State study of 2D solid 4He Path Integral Ground State study of 2D solid 4He

2008-01-11

arxiv.org/abs/0801.1753v3

Physics

Condensed Matter

Other Condensed Matter

4 pages, 4 figures

Scientific paper

We have studied a two-dimensional triangular commensurate crystal of 4He with the exact T=0 K Path Integral Ground State (PIGS) Monte Carlo method. We have projected onto the true ground state both a Jastrow-Nosanow wave function, in which equilibrium positions are explicitly given and no Bose-Einstein (BEC) is present, and a translationally invariant shadow wave function, in which the solid phase emerges through a spontaneously broken symmetry process and it has BEC. We find a remarkable convergence to the same properties, both the diagonal ones as well as the off-diagonal one-body density matrix rho_1. This supplies a strong evidence that no variational bias are present in the PIGS method. We find no BEC in the commensurate 2D 4He crystal at T=0 K, rho_1 shows an exponential decay in the large distance range. The structure found in rho_1 is due to virtual vacancy--interstitial pairs and this shows up in the momentum distribution.

Affiliated with

Also associated with

No associations

Rating

Path Integral Ground State study of 2D solid 4He 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 Path Integral Ground State study of 2D solid 4He, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Path Integral Ground State study of 2D solid 4He will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-547727