Dispersive Readout of Room Temperature Spin Qubits

Abstract

We demonstrate dispersive readout of the spin of an ensemble of Nitrogen-Vacancy centers in a high-quality dielectric microwave resonator at room temperature. The spin state is inferred from the reflection phase of a microwave signal probing the resonator. Time-dependent tracking of the spin state is demonstrated, and is employed to measure the T1 relaxation time of the spin ensemble. Dispersive readout provides a microwave interface to solid state spins, translating a spin signal into a microwave phase shift. We estimate that its sensitivity can outperform optical readout schemes, owing to the high accuracy achievable in a measurement of phase. The scheme is moreover applicable to optically inactive spin defects and it is non-destructive, which renders it insensitive to several systematic errors of optical readout and enables the use of quantum feedback.

References in corpus (8)

• High-sensitivity diamond magnetometer with nanoscale resolution
• Approaching Unit Visibility for Control of a Superconducting Qubit with Dispersive Readout
• Quantum feedback control of a superconducting qubit: Persistent Rabi oscillations
• Observation of quantum jumps in a superconducting artificial atom
• Broadband Magnetometry and Temperature Sensing with a Light Trapping Diamond Waveguide
• Ultrahigh finesse Fabry-Perot superconducting resonator
• Efficient electrical spin readout of NV- centers in diamond
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Cited by in corpus (9)

• The Variational Quantum Eigensolver: a review of methods and best practices
• Dissipative superradiant spin amplifier for enhanced quantum sensing
• Cavity Quantum Electrodynamics Effects with Nitrogen Vacancy Center Spins in Diamond and Microwave Resonators at Room Temperature
• Fast coherent control of an NV- spin ensemble using a KTaO3 dielectric resonator at cryogenic temperatures
• Generalized figure of merit for qubit readout
• Bichromatic microwave manipulation of the NV center nuclear spin using transition not detectable via optically detected magnetic resonance
• Magnetometry with Broadband Microwave Fields in Nitrogen-Vacancy Centers in Diamond
• A three-dimensional multimode lumped-element resonator for collective spin manipulation and dispersive readout
• Dispersive readout with two orthogonal modes of a dielectric cavity