An analytical error model for quantum computer simulation

Details An analytical error model for quantum computer simulation An analytical error model for quantum computer simulation

2007-12-29

arxiv.org/abs/0801.0094v2

Physics

Quantum Physics

Scientific paper

10.1103/PhysRevA.77.052315

Quantum computers (QCs) must implement quantum error correcting codes (QECCs) to protect their logical qubits from errors, and modeling the effectiveness of QECCs on QCs is an important problem for evaluating the QC architecture. The previously developed Monte Carlo (MC) error models may take days or weeks of execution to produce an accurate result due to their random sampling approach. We present an alternative analytical error model that generates, over the course of executing the quantum program, a probability tree of the QC's error states. By calculating the fidelity of the quantum program directly, this error model has the potential for enormous speedups over the MC model when applied to small yet useful problem sizes. We observe a speedup on the order of 1,000X when accuracy is required, and we evaluate the scaling properties of this new analytical error model.

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