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arXiv · 2306.03564

Theory of the Simultaneous Transient Dispersive Readout of Multiple Spin Qubits

Florian Ginzel·Guido Burkard
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Abstract

We propose a paradigm of multiplexed dispersive qubit measurement performed while the qubits dephase. A Laplace transformation of the time-dependent cavity response allows to separate contributions from multiple qubits coupled to the same resonator mode, thus allowing for simultaneous single-shot read out. With realistic parameters for silicon spin qubits we find a competitive readout fidelity, while the measurement time compares favourably to conventional dispersive readout. We extend the multiplexed readout method to quantum non-demolition measurements using auxiliary qubits.

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Florian Ginzel, Guido Burkard. 2023-06-06. Theory of the Simultaneous Transient Dispersive Readout of Multiple Spin Qubits. https://doi.org/10.1103/physrevb.108.125437

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