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Controlling the coherence of a diamond spin qubit through its strain environment

Journal Article · · Nature Communications
 [1];  [1];  [2];  [1];  [3];  [2];  [2];  [2];  [1];  [1];  [1];  [4];  [4];  [4];  [1];  [2];  [1]
  1. Harvard Univ., Cambridge, MA (United States)
  2. Univ. of Cambridge (United Kingdom). Cavendish Lab.
  3. Harvard Univ., Cambridge, MA (United States); Univ. of Cambridge (United Kingdom). Cavendish Lab.
  4. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
The uncontrolled interaction of a quantum system with its environment is detrimental for quantum coherence. For quantum bits in the solid state, decoherence from thermal vibrations of the surrounding lattice can typically only be suppressed by lowering the temperature of operation. Here, we use a nano-electro-mechanical system to mitigate the effect of thermal phonons on a spin qubit – the silicon-vacancy colour centre in diamond – without changing the system temperature. By controlling the strain environment of the colour centre, we tune its electronic levels to probe, control, and eventually suppress the interaction of its spin with the thermal bath. Strain control provides both large tunability of the optical transitions and significantly improved spin coherence. Finally, our findings indicate the possibility to achieve strong coupling between the silicon-vacancy spin and single phonons, which can lead to the realisation of phonon-mediated quantum gates and nonlinear quantum phononics.
Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1469655
Report Number(s):
SAND2017--5085J; PII: 4340
Journal Information:
Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 9; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (27)

Quantum nanophotonics with group IV defects in diamond journal December 2019
Quantum state transfer via acoustic edge states in a 2D optomechanical array text January 2019
Quantum Micro–Nano Devices Fabricated in Diamond by Femtosecond Laser and Ion Irradiation journal April 2019
Building Blocks for Quantum Network Based on Group‐IV Split‐Vacancy Centers in Diamond journal October 2019
Inverse-designed diamond photonics journal July 2019
Scalable in operando strain tuning in nanophotonic waveguides enabling three-quantum-dot superradiance journal July 2019
Quantum state transfer via acoustic edge states in a 2D optomechanical array journal November 2019
Spectral Alignment of Single-Photon Emitters in Diamond using Strain Gradient journal August 2018
An integrated nanophotonic quantum register based on silicon-vacancy spins in diamond journal October 2019
Strain engineering of the silicon-vacancy center in diamond journal May 2018
Ground-state cooling enabled by critical coupling and dark entangled states journal January 2019
Initialization and Readout of Nuclear Spins via a Negatively Charged Silicon-Vacancy Center in Diamond journal May 2019
Optical Gating of Resonance Fluorescence from a Single Germanium Vacancy Color Center in Diamond journal July 2019
Simulation of topological phases with color center arrays in phononic crystals journal February 2020
Scaling Phononic Quantum Networks of Solid-State Spins with Closed Mechanical Subsystems journal November 2018
Quantum Interference of Electromechanically Stabilized Emitters in Nanophotonic Devices journal August 2019
Optical coherence of implanted silicon vacancy centers in thin diamond membranes journal January 2019
Supercontinuum generation in angle-etched diamond waveguides journal January 2019
Controlling phonons and photons at the wavelength scale: integrated photonics meets integrated phononics journal January 2019
Strain engineering of the silicon-vacancy center in diamond text January 2018
Scaling Phononic Quantum Networks of Solid-State Spins with Closed Mechanical Subsystems text January 2018
Spectral alignment of single-photon emitters in diamond using strain gradient text January 2018
Scalable in operando strain tuning in nanophotonic waveguides enabling three-quantum dot superradiance text January 2018
Inverse-Designed Diamond Photonics text January 2018
Quantum interference of electromechanically stabilized emitters in nanophotonic devices text January 2019
An integrated nanophotonic quantum register based on silicon-vacancy spins in diamond text January 2019
Simulation of topological phases with color center arrays in phononic crystals text January 2020

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