SUPR
Quantum simulation of spin glasses with Josephson Junction arrays
Dnr:

NAISS 2024/22-335

Type:

NAISS Small Compute

Principal Investigator:

Andrea Maiani

Affiliation:

NORDITA

Start Date:

2024-03-20

End Date:

2025-04-01

Primary Classification:

10304: Condensed Matter Physics

Webpage:

Allocation

Abstract

Quantum Spin Glasses are pivotal in quantum computing applications, notably through their connection to optimization and combinatorial problems. However, many theoretical results still lack experimental verification. In this project, we aim to create quantum simulators for spin glass systems through carefully engineered Josephson Junction Array (JJA) bilayers where the two layers have significantly different capacitances. In collaboration with experimental partners, I drafted the device design, and our initial characterization identified parameters crucial for inducing a glass phase in a JJA bilayer. An extensive Monte Carlo study is essential to understand the equilibration dynamics to ensure the stability of the glassy phase for longer equilibration timescales. Simulations of rotor models demand substantial processing power and memory due to long autocorrelation times. Access to advanced computational facilities would enable the completion of the characterization of the device design. Initially, I will use a program that I already coded working on CPUs, eventually, I will consider GPU acceleration at a later stage in case of need. I estimate the projected will last one year for the first milestones. The project may be extended depending on the results and possible additional questions.