Quantum Digital Simulation of Cavity Quantum Electrodynamics: Insights from Superconducting and Trapped Ion Quantum Testbeds
arxiv(2024)
摘要
A leading application of quantum computers is the efficient simulation of
large unitary quantum systems. Extending this advantage to the study of open
Cavity Quantum Electrodynamics (CQED) systems could enable the use of quantum
computers in the exploration and design of many-body quantum optical devices.
Such devices have promising applications in optical quantum communication,
simulation, and computing. In this work, we present an early exploration of the
potential for quantum computers to efficiently investigate open CQED physics.
Our simulations make use of a recent quantum algorithm that maps the dynamics
of a singly excited open Tavis-Cummings model containing N atoms coupled to a
lossy cavity. We report the results of executing this algorithm on two noisy
intermediate-scale quantum computers, a superconducting processor and a trapped
ion processor, to simulate the population dynamics of an open CQED system
featuring N = 3 atoms. By applying technology-specific transpilation and
error mitigation techniques, we minimize the impact of gate errors, noise, and
decoherence in each hardware platform, obtaining results which agree closely
with the exact solution of the system. These results provide confidence that
future simulation algorithms, combined with emerging large-scale quantum
processors, can be a powerful tool for studying cavity quantum electrodynamics.
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