Many-body Hierarchy of Dissipative Timescales in a Quantum Computer

TL;DR

This paper demonstrates that current noisy quantum computers can simulate many-body open quantum system dynamics, revealing an emergent hierarchy of relaxation timescales through experimental validation on IBM Quantum hardware.

Contribution

It experimentally confirms the theoretical hierarchy of dissipative timescales in many-body systems using real quantum hardware, leveraging intrinsic device dissipation.

Findings

Validation of the hierarchy of relaxation timescales in many-body observables.

Implementation of local dissipative interactions using intrinsic device dissipation.

Experimental confirmation of theoretical predictions from prior work.

Abstract

We show that current noisy quantum computers are ideal platforms for the simulation of quantum many-body dynamics in generic open systems. We demonstrate this using the IBM Quantum Computer as an experimental platform for confirming the theoretical prediction from [Phys. Rev. Lett.124, 100604 (2020)] of an emergent hierarchy of relaxation timescales of many-body observables involving different numbers of qubits. Using different protocols, we leverage the intrinsic dissipation of the machine responsible for gate errors, to implement a quantum simulation of generic (i.e. structureless) local dissipative interactions.