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Thermal state preparation of the SYK model using a variational quantum algorithm

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arxiv 2406.15545 v2 pith:5OJV6Q2X submitted 2024-06-21 quant-ph hep-lathep-th

classification quant-phhep-lathep-th
keywords quantumthermalmodelpreparationalgorithmcomputationsdensestates
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abstract

We study the preparation of thermal states of the dense and sparse Sachdev-Ye-Kitaev (SYK) model using a variational quantum algorithm for $6 \le N \le 12$ Majorana fermions over a wide range of temperatures. Utilizing IBM's 127-qubit quantum processor, we perform benchmark computations for the dense SYK model with $N = 6$, showing good agreement with exact results. The preparation of thermal states of a non-local random Hamiltonian with all-to-all coupling using the simulator and quantum hardware represents a significant step toward future computations of thermal out-of-time order correlators in quantum many-body systems.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Improving thermal state preparation of Sachdev-Ye-Kitaev model with reinforcement learning on quantum hardware

    quant-ph 2025-01 reject novelty 5.0 of 10

    Reinforcement learning with a 3D convolutional network designs low-CNOT circuits for variational thermal state preparation of the SYK model up to 14 Majorana fermions, but training uses the exact free energy and fidel...

  2. Quantum computing of chirality imbalance in SU(2) gauge theory

    hep-ph 2024-11 conditional novelty 5.0 of 10

    A variational quantum algorithm with Monte Carlo sampling reproduces the exact thermal chiral condensate in 1+1D SU(2) gauge theory on 8 to 12 qubits and on IBM hardware.

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