Trotterless Simulation of Open Quantum Systems for NISQ Quantum Devices

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Abstract

The simulation of quantum systems is one of the flagship applications of near-term NISQ (noisy intermediate-scale quantum) computing devices. Efficiently simulating the rich, non-unitary dynamics of open quantum systems remains challenging on NISQ hardware. Current simulation methods for open quantum systems employ time-stepped Trotter product formulas (“Trotterization”) which can scale poorly with respect to the simulation time and system dimension. Here, a new simulation method is proposed based on the derivation of a time-perturbative Kraus operator series representation of the system. A class of open quantum systems is identified for which this method produces circuits of time-independent depth, which may serve as a desirable alternative to Trotterization, especially on NISQ devices.

Recommended citation:

C. Burdine, E. P. Blair, Trotterless Simulation of Open Quantum Systems for NISQ Quantum Devices. Adv Quantum Technol. 2025, 8, 2400240. https://doi.org/10.1002/qute.202400240

BibTeX:

@article{https://doi.org/10.1002/qute.202400240,
    author = {Burdine, Colin and Blair, Enrique P.},
    title = {Trotterless Simulation of Open Quantum Systems for NISQ Quantum Devices},
    journal = {Advanced Quantum Technologies},
    volume = {8},
    number = {1},
    pages = {2400240},
    doi = {https://doi.org/10.1002/qute.202400240},
    year = {2025}
}