Demonstration of system-bath physics on gate-based quantum computer

• URL: http://arxiv.org/abs/2404.18828v2
• Date: Tue, 30 Apr 2024 10:02:49 GMT
• Title: Demonstration of system-bath physics on gate-based quantum computer
• Authors: Pascal Stadler, Matteo Lodi, Andisheh Khedri, Rolando Reiner, Kirsten Bark, Nicolas Vogt, Michael Marthaler, Juha Leppäkangas,
• Abstract summary: We demonstrate algorithmic cooling on IBM-Q devices. We are able to perform simulated cooling for global systems of up to three system spins and four auxiliary spins.
• Score: 0.5224038339798621
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We demonstrate algorithmic cooling on IBM-Q devices. We utilize inherent qubit noise to simulate the equilibration of an interacting spin system towards its ground state, when coupled to a dissipative auxiliary-spin bath. The steady-state correlations in the system are defined by the system Hamiltonian and are stable as long as the algorithm can be executed. In particular, we demonstrate the relaxation of system spins to ferromagnetic and antiferromagnetic ordering, controlled by the definition of the Hamiltonian. We are able to perform simulated cooling for global systems of up to three system spins and four auxiliary spins.

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