Southwest Quantum Information and Technology

Efficient quantum annealing and thermalization

Presenting Author: Nikolai Sinitsyn, Los Alamos National Laboratory
Contributing Author(s): Vladimir Chernyak, and Fuxiang Li

We provide arguments for existence of a completely alternative mechanism of quantum thermalization. We show that integrable quantum systems contain a symmetry that enforces detailed balance constraints on the excitation probabilities during non-adiabatic quantum annealing. Thus, contrary to the common belief, the emergence of a perfect Gibbs distribution from a single eigenstate of a Hamiltonian is natural in closed integrable quantum systems. This mechanism does not require any randomness or parameter uncertainties. The model that we solve for demonstration also shows the possibility of the arbitrarily fast quantum annealing computations at a vanishingly small error rate.

Read this article online: https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.121.190601, https://arxiv.org/pdf/1804.00371.pdf

(Session 5 : Sunday from 5:00pm - 7:00pm)