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QI: Fachverband Quanteninformation
QI 22: Quantum Simulation I
QI 22.5: Vortrag
Donnerstag, 21. März 2024, 10:45–11:00, HFT-FT 101
Noise-assisted digital quantum simulation of open systems — •José Guimarães1,2,3, Jaemin Lim1, Mikhail Vasilevskiy2,3, Susana Huelga1, and Martin Plenio1 — 1Institute of Theoretical Physics at Ulm University, Ulm, Germany — 2Center of Physics of University of Minho and Porto, Braga, Portugal — 3International Iberian Nanotechnology Laboratory, Braga, Portugal
In the current developmental phase of quantum computing, noise is generally considered a limiting factor. However, our recent research demonstrates that the intrinsic noise can be strategically utilized to efficiently simulate open quantum systems within the framework of Markovian approximations. This approach distinguishes itself from earlier methodologies by requiring solely the characterisation of device-specific noise and the implementation of partial quantum error mitigation techniques. As a result, it opens the door for a potential exponential speedup in the simulation of open quantum systems when compared to traditional closed-system quantum simulations that require full error mitigation in current noisy quantum devices. Moreover, we present a new methodology for simulating (generalised) amplitude damping in near-term quantum computers. This later approach eliminates the dependence on resource-intensive ancillary qubits or mid-circuit measurements. Our approach holds the potential to unlock new simulation techniques in Noisy Intermediate-Scale Quantum (NISQ) devices, harnessing their intrinsic noise to enhance quantum computations.
Keywords: Quantum computing; Quantum simulation; Open quantum systems