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Title: Controlling spin relaxation with a cavity

Journal Article · · Nature (London)
DOI:https://doi.org/10.1038/nature16944· OSTI ID:1379133
 [1];  [2];  [1];  [3];  [4];  [2];  [5];  [5];  [1];  [1];  [2];  [1]
  1. Alternative Energies and Atomic Energy Commission (CEA-Saclay), Gif-sur-Yvette (France)
  2. Univ. College London (United Kingdom)
  3. Alternative Energies and Atomic Energy Commission (CEA-Saclay), Gif-sur-Yvette (France); Inst. of Electronics, Microelectronics and Nanotechnology (IEMN), Villeneuve d'Ascq (France)
  4. Alternative Energies and Atomic Energy Commission (CEA-Saclay), Gif-sur-Yvette (France); Bar-Ilan Univ., Ramat Gan (Israel)
  5. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Spontaneous emission of radiation is one of the fundamental mechanisms by which an excited quantum system returns to equilibrium. For spins, however, spontaneous emission is generally negligible compared to other non-radiative relaxation processes because of the weak coupling between the magnetic dipole and the electromagnetic field. In 1946, Purcell realized that the rate of spontaneous emission can be greatly enhanced by placing the quantum system in a resonant cavity. This effect has since been used extensively to control the lifetime of atoms and semiconducting heterostructures coupled to microwave or optical cavities, and is essential for the realization of high-efficiency single-photon sources. In this paper, we report the application of this idea to spins in solids. By coupling donor spins in silicon to a superconducting microwave cavity with a high quality factor and a small mode volume, we reach the regime in which spontaneous emission constitutes the dominant mechanism of spin relaxation. The relaxation rate is increased by three orders of magnitude as the spins are tuned to the cavity resonance, demonstrating that energy relaxation can be controlled on demand. Our results provide a general way to initialize spin systems into their ground state and therefore have applications in magnetic resonance and quantum information processing. Finally, they also demonstrate that the coupling between the magnetic dipole of a spin and the electromagnetic field can be enhanced up to the point at which quantum fluctuations have a marked effect on the spin dynamics; as such, they represent an important step towards the coherent magnetic coupling of individual spins to microwave photons.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE; European Research Council (ERC)
Grant/Contract Number:
AC02-05CH11231; 615767; 279781; 630070
OSTI ID:
1379133
Journal Information:
Nature (London), Vol. 531, Issue 7592; ISSN 0028-0836
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 113 works
Citation information provided by
Web of Science

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Cited By (34)

Quantum Interface between a Superconducting Qubit and Spin Ensembles journal May 2019
Coherent Conversion Between Microwave and Optical Photons—An Overview of Physical Implementations journal January 2020
Spontaneous Radiation of a Two-Level System Confined in a Reflective Spherical Shell Quantum Dot: Spontaneous Radiation of a Two-Level System in a Spherical Shell journal April 2019
A coherent spin–photon interface in silicon journal February 2018
Solid-state electron spin lifetime limited by phononic vacuum modes journal February 2018
Rapid gate-based spin read-out in silicon using an on-chip resonator journal July 2019
Superradiant emission from colour centres in diamond journal September 2018
Electron paramagnetic resonance spectroscopy using a single artificial atom journal March 2019
Coherent control of magnon radiative damping with local photon states journal December 2019
Superconductor–semiconductor hybrid-circuit quantum electrodynamics journal January 2020
Inductive-detection electron-spin resonance spectroscopy with 65 spins/ Hz sensitivity journal November 2017
Magnetic field dependent microwave losses in superconducting niobium microstrip resonators journal July 2018
Atoms and molecules in cavities, from weak to strong coupling in quantum-electrodynamics (QED) chemistry journal March 2017
Quantum information processing with superconducting circuits: a review journal September 2017
Localization to delocalization crossover in a driven nonlinear cavity array journal May 2018
Spin detection with a micromechanical trampoline: towards magnetic resonance microscopy harnessing cavity optomechanics journal April 2019
Aging of a quantum battery journal October 2019
Strong Purcell Effect on a Neutral Atom Trapped in an Open Fiber Cavity journal October 2018
Electro-mechano-optical detection of nuclear magnetic resonance journal January 2018
Quantum Interface between a Superconducting Qubit and Spin Ensembles journal September 2020
Strain-induced spin resonance shifts in silicon devices text January 2016
Quantum information processing with superconducting circuits: a review text January 2016
Electro-mechano-optical detection of nuclear magnetic resonance text January 2017
Spin detection with a micromechanical trampoline: Towards magnetic resonance microscopy harnessing cavity optomechanics text January 2018
Strong Coupling between Microwave Photons and Nanomagnet Magnons text January 2019
Superconductor-semiconductor hybrid cavity quantum electrodynamics text January 2019
Strong coupling between two spin ensembles via a large Josephson junction preprint January 2016
Tunable Nb superconducting resonators based upon a Ne-FIB-fabricated constriction nanoSQUID text January 2018
Tunable superconducting two-chip lumped element resonator text January 2018
Storing quantum information in spins and high-sensitivity ESR text January 2019
Incorporation of erbium ions into thin-film lithium niobate integrated photonics text January 2019
Experimental protection of quantum coherence by using a phase-tunable image drive text January 2020
Driven-state relaxation of a coupled qubit-defect system in spin-locking measurements text January 2020
Qubit guidelines for solid-state spin defects preprint January 2020

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