Proposal for detection of a single electron spin in a microwave resonator

Abstract

We propose a method for detecting the presence of a single spin in a crystal by coupling it to a high-quality factor superconducting planar resonator. By confining the microwave field in a constriction of nanometric dimensions, the coupling constant can be as high as $5-10$\,kHz. This coupling affects the amplitude of the field emitted by the resonator, and the integrated homodyne signal allows detection of a single spin with unit signal-to-noise ratio within few milliseconds. We further show that a stochastic master equation approach and a Bayesian analysis of the full time dependent homodyne signal improves this figure by $\sim 30\%$ for typical parameters.

11 pages, 7 figures

References in corpus (12)

• Single-shot read-out of an individual electron spin in a quantum dot
• An addressable quantum dot qubit with fault-tolerant control fidelity
• Coherent control of single spins in silicon carbide at room temperature
• Circuit Quantum Electrodynamics with a Spin Qubit
• Nanoscale magnetic imaging of a single electron spin under ambient conditions
• Room temperature quantum bit storage exceeding 39 minutes using ionized donors in 28-silicon
• A widely tunable parametric amplifier based on a SQUID array resonator
• Coherence of single spins coupled to a nuclear spin bath of varying density
• Electron Spin Resonance at the Level of 10000 Spins Using Low Impedance Superconducting Resonators
• High-gain weakly nonlinear flux-modulated Josephson parametric amplifier using a SQUID-array
• Fast, low-power manipulation of spin ensembles in superconducting microresonators
• Energy gap measurement of nanostructured thin aluminium films for use in single Cooper-pair devices

Cited by in corpus (7)

• Inductive-detection electron-spin resonance spectroscopy with $65$spins$/\sqrt{\text{Hz}}$ sensitivity
• Enhanced molecular spin-photon coupling at superconducting nanoconstrictions
• Storing quantum information in spins and high-sensitivity ESR
• Low-impedance superconducting microwave resonators for strong coupling to small magnetic mode volumes
• Simulating the Lipkin-Meshkov-Glick model in a hybrid quantum system
• Binary Discrimination in Quantum Systems via Hypothesis Testing
• Determining the position of a single spin relative to a metallic nanowire