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Simulating Open Quantum Systems Using Hamiltonian Simulations

Journal Article · · PRX Quantum

We present a novel method to simulate the Lindblad equation, drawing on the relationship between Lindblad dynamics, stochastic differential equations, and Hamiltonian simulations. We derive a sequence of unitary dynamics in an enlarged Hilbert space that can approximate the Lindblad dynamics up to an arbitrarily high order. This unitary representation can then be simulated using a quantum circuit that involves only Hamiltonian simulation and tracing out the ancilla qubits. There is no need for additional postselection in measurement outcomes, ensuring a success probability of one at each stage. Our method can be directly generalized to the time-dependent setting. We provide numerical examples that simulate both time-independent and time-dependent Lindbladian dynamics with accuracy up to the third order.

Published by the American Physical Society 2024
Sponsoring Organization:
USDOE
OSTI ID:
2349188
Journal Information:
PRX Quantum, Journal Name: PRX Quantum Journal Issue: 2 Vol. 5; ISSN 2691-3399; ISSN PQRUAG
Publisher:
American Physical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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