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Quantum Physics

Title: Quantum Benchmarking via Random Dynamical Quantum Maps

Abstract: We present a benchmarking protocol for universal quantum computers, achieved through the simulation of random dynamical quantum maps. This protocol provides a holistic assessment of system-wide error rates, encapsulating both gate inaccuracies and the errors associated with mid-circuit qubit measurements and resets. By employing random quantum circuits and segmenting mid-circuit qubit measurement and reset in a repeated fashion, we steer the system of qubits to an ensemble of steady-states. These steady-states are described by random Wishart matrices, and align with the steady-state characteristics previously identified in random Lindbladian dynamics, including the universality property. The protocol assesses the resulting ensemble probability distribution measured in the computational basis, effectively avoiding a tomographic reconstruction. Our various numerical simulations demonstrate the relationship between the final distribution and different error sources. Additionally, we implement the protocol on state-of-the-art transmon qubits provided by IBM Quantum, drawing comparisons between empirical results, theoretical expectations, and simulations derived from a fitted noise model of the device.
Subjects: Quantum Physics (quant-ph)
Cite as: arXiv:2404.18846 [quant-ph]
  (or arXiv:2404.18846v1 [quant-ph] for this version)

Submission history

From: Daniel Volya [view email]
[v1] Mon, 29 Apr 2024 16:37:11 GMT (7676kb,D)

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