Engineered Reservoirs for Thermalization of Many-Body Quantum Systems
ORAL
Abstract
Engineering genuine thermal states in quantum analog simulation platforms are addressed by a technique based on a many-body spin Hamiltonians coupled to driven, dissipative ancilla spins. A Born-Markov master equation describing the dynamics of a many-body system coupled to fast-relaxing, driven ancilla qubits is developed, and if the ancilla energies are periodically modulated and swept across the system energy spectrum, with a carefully chosen hierarchy of timescales, one can effectively thermalize a many-body system. Analytical proofs and numerical investigations are used to validate the requirements of thermalization and demonstrate the true thermal state is an approximate dynamical fixed point.
*Sandia National Laboratories is a multimission laboratory managed and operated by National Technology and Engineering Solutions of Sandia, LLC., a wholly owned subsidiary of Honeywell International, Inc., for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-NA-0003525. This paper describes objective technical results and analysis. Any subjective views or opinions that might be expressed in the abstract do not necessarily represent the views of the U.S. Department of Energy or the United States Government.
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Presenters
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Mekena Metcalf
- Sandia National Laboratories California