Chiral basis for qubits and decay of spin helix states

Date

Wednesday, February 7, 2024
11:00 - 13:00

Abstract

We propose a qubit basis composed of transverse spin helices with kinks. This chiral basis, in contrast to the usual computational basis, is particularly suited for describing quantum states with nontrivial topology. For an appropriate choice of parameters, operators containing transverse spin components, such as σxn or σyn, become diagonal in the chiral basis. This is facilitating the study of problems focusing on transverse spin components. As an application we study the decay of the transverse polarization of a spin helix in the XX model which has been measured in recent cold atom experiments and obtain an explicit universal function describing the relaxation of the amplitude of helices of arbitrary wavelength.

Organiser

Condensed Matter Theory group

Venue

UvA - Faculty of Science

Room number

L1.14

Category

Group Seminar

Topics

condensed matter theory

Speakers

Frank Göhmann (Bergische Universität Wuppertal)