Vortex Excitation in Superfluid <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow></mrow><mrow><mn>4</mn></mrow></msup></mrow><mi>He</mi></math></span>: A Diffusion Monte Carlo Study

S. Giorgini; J. Boronat; J. Casulleras

doi:10.1103/PhysRevLett.77.2754

Vortex Excitation in Superfluid $^{4} He$ : A Diffusion Monte Carlo Study

S. Giorgini, J. Boronat, and J. Casulleras

Phys. Rev. Lett. 77, 2754 – Published 23 September 1996

Abstract

We present a diffusion Monte Carlo study of a single vortex in two-dimensional superfluid liquid $^{4} He$ within the fixed-node approximation. We use both the Feynman phase and an improved phase which includes backflow correlations to model the nodal surface of the vortex wave function. Results for the particle density, core radius, and excitation energies are presented.

Received 14 June 1996

DOI:https://doi.org/10.1103/PhysRevLett.77.2754

Authors & Affiliations

S. Giorgini^1,2,3, J. Boronat³, and J. Casulleras³

¹Dipartimento di Fisica, Università di Trento, I-38050 Povo, Italy
²and Istituto Nazionale di Fisica della Materia, I-38050 Povo, Italy
³Departament de Física i Enginyeria Nuclear, Campus Nord B4-B5, Universitat Politècnica de Catalunya, E-08028 Barcelona, Spain