Digital simulation of zero-temperature spontaneous symmetry breaking in a superconducting lattice processor
arXiv:2409.17620 · doi:10.1038/s41467-025-57812-8
Abstract
Quantum simulators are ideal platforms to investigate quantum phenomena that are inaccessible through conventional means, such as the limited resources of classical computers to address large quantum systems or due to constraints imposed by fundamental laws of nature. Here, through a digitized adiabatic evolution, we report an experimental simulation of antiferromagnetic (AFM) and ferromagnetic (FM) phase formation induced by spontaneous symmetry breaking (SSB) in a three-generation Cayley tree-like superconducting lattice. We develop a digital quantum annealing algorithm to mimic the system dynamics, and observe the emergence of signatures of SSB-induced phase transition through a connected correlation function. We demonstrate that the signature of phase transition from classical AFM to quantum FM happens in systems undergoing zero-temperature adiabatic evolution with only nearest-neighbor interacting systems, the shortest range of interaction possible. By harnessing properties of the bipartite Renyi entropy as an entanglement witness, we observe the formation of entangled quantum FM and AFM phases. Our results open perspectives for new advances in condensed matter physics and digitized quantum annealing.
References in corpus (14)
- Spontaneous symmetry breaking in a quenched ferromagnetic spinor Bose condensate
- Bounds for the adiabatic approximation with applications to quantum computation
- Quantum critical dynamics in a 5000-qubit programmable spin glass
- Scalable error mitigation for noisy quantum circuits produces competitive expectation values
- Adiabatic approximation in open quantum systems
- Continuous Symmetry Breaking in a Two-dimensional Rydberg Array
- Quantum Adiabatic Brachistochrone
- On-Demand Directional Microwave Photon Emission Using Waveguide Quantum Electrodynamics
- Anomalous Behavior of Spin Systems with Dipolar Interactions
- Simple Mitigation of Global Depolarizing Errors in Quantum Simulations
- Novel Magnetism and Local Symmetry Breaking in a Mott Insulator with Strong Spin Orbit Interactions
- Continuous Symmetry Breaking in a Trapped-Ion Spin Chain
- Quantum annealing simulation of out-of-equilibrium magnetization in a spin-chain compound
- Quantum Wheatstone Bridge