The multi-shot readout error of an NV center qubit scales as Δ/√N, with a fundamental lower bound of sqrt(2/3), and the authors compute Δ for realistic readout conditions.
Modeling Quantum Volume Using Randomized Benchmarking of Room-Temperature NV Center Quantum Registers
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abstract
Accurately estimating the performance of quantum hardware is crucial for comparing different platforms and predicting the performance and feasibility of quantum algorithms and applications. In this paper, we tackle the problem of benchmarking a quantum register based on the NV center in diamond operating at room temperature. We define the connectivity map as well as single qubit performance. Thanks to an all-to-all connectivity the 2 and 3 qubit gates performance is promising and competitive among other platforms. We experimentally calibrate the error model for the register and use it to estimate the quantum volume, a metric used for quantifying the quantum computational capabilities of the register, of 8. Our results pave the way towards the unification of different architectures of quantum hardware and evaluation of the joint metrics.
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Multi-shot readout error benchmark of the nitrogen-vacancy center's electronic qubit
The multi-shot readout error of an NV center qubit scales as Δ/√N, with a fundamental lower bound of sqrt(2/3), and the authors compute Δ for realistic readout conditions.