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Paper 1

Architecting a reliable quantum operating system: microkernel, message passing and supercomputing

Alexandru Paler

Year

2024

Journal

arXiv preprint

DOI

arXiv:2410.13482

arXiv

2410.13482

A quantum operating system (QCOS) is a classic software running on classic hardware. The QCOS is preparing, starting, controlling and managing quantum computations. The reliable execution of fault-tolerant quantum computations will require the QCOS to be as reliable and fault-tolerant as the computation itself. In the following, we discuss why a QCOS should be architected according to the following principles: 1) using a microkernel; 2) the components are working in an aggregated, non-stacked manner and communicate by message passing; 3) the components are executed by default on supercomputers, unless there are very good reasons not to. These principles can guarantee that the execution of error-corrected, fault-tolerant quantum computation is not vulnerable to the failures of the QCOS.

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Paper 2

Trotterless Simulation of Open Quantum Systems for NISQ Quantum Devices

Colin Burdine, Enrique P. Blair

Year

2024

Journal

arXiv preprint

DOI

arXiv:2410.03854

arXiv

2410.03854

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, we propose a new simulation method based on the derivation of a Kraus operator series representation of the system. We identify a class of open quantum systems for which this method produces circuits of time-independent depth, which may serve as a desirable alternative to Trotterization, especially on NISQ devices.

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