Storing quantum information in spins and high-sensitivity ESR

Abstract

Quantum information, encoded within the states of quantum systems, represents a novel and rich form of information which has inspired new types of computers and communications systems. Many diverse electron spin systems have been studied with a view to storing quantum information, including molecular radicals, point defects and impurities in inorganic systems, and quantum dots in semiconductor devices. In these systems, spin coherence times can exceed seconds, single spins can be addressed through electrical and optical methods, and new spin systems with advantageous properties continue to be identified. Spin ensembles strongly coupled to microwave resonators can, in principle, be used to store the coherent states of single microwave photons, enabling so-called microwave quantum memories. We discuss key requirements in realising such memories, including considerations for superconducting resonators whose frequency can be tuned onto resonance with the spins. Finally, progress towards microwave quantum memories and other developments in the field of superconducting quantum devices are being used to push the limits of sensitivity of inductively-detected electron spin resonance. The state-of-the-art currently stands at around 65 spins per root-Hz, with prospects to scale down to even fewer spins.

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Cited by in corpus (20)

• Hybrid quantum systems based on magnonics
• Materials challenges for quantum technologies based on color centers in diamond
• Elimination of Noise in Optically Rephased Photon Echoes
• Tuning high-Q superconducting resonators by magnetic field reorientation
• Multimode storage of quantum microwave fields in electron spins over 100 ms
• In-situ amplification of spin echoes within a kinetic inductance parametric amplifier
• Nonlinear Effects in Superconducting Thin Film Microwave Resonators
• Coherent optical-microwave interface for manipulation of low-field electronic clock transitions in ${}^{171}$Yb${}^{3+}$:Y${}_2$SiO${}_5$
• Measurements of a quantum bulk acoustic resonator using a superconducting qubit
• Machine Learning-Assisted Manipulation and Readout of Molecular Spin Qubits
• Spin echo silencing using a current-biased frequency-tunable resonator
• Spatially-resolved decoherence of donor spins in silicon strained by a metallic electrode
• Millikelvin Nb nanoSQUID-embedded tuneable resonator fabricated with a neon focused-ion-beam
• Piezoelectric microresonators for sensitive spin detection
• Pulsed Electron Spin Resonance of an Organic Microcrystal by Dispersive Readout
• Development of planar microstrip resonators for electron spin resonance spectroscopy
• Exploring the limits of the generation of non-classical states of spins coupled to a cavity by optimal control
• Superconducting microwave oscillators as detectors for ESR spectroscopy
• Triggering spin reversal in nanomolecules and nanoclusters on demand
• Clock Transitions Generated by Defects in Silica Glass