Wednesday, February 7, 2024
11:00 - 13:00
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.
Condensed Matter Theory group
UvA - Faculty of Science
L1.14
Group Seminar
condensed matter theory
Frank Göhmann (Bergische Universität Wuppertal)