Geometric spin echo under zero field

Abstract

Spin echo is a fundamental tool for quantum registers and biomedical imaging. It is believed that a strong magnetic field is needed for the spin echo to provide long memory and high resolution since a degenerate spin cannot be controlled or addressed under a zero magnetic field. While a degenerate spin is never subject to dynamic control, it is still subject to geometric control. Here we show the spin echo of a degenerate spin subsystem, which is geometrically controlled via a mediating state split by the crystal field, in a nitrogen vacancy center in diamond. The demonstration reveals that the degenerate spin is protected by inherent symmetry breaking called zero-field splitting. The geometric spin echo under zero field provides an ideal way to maintain the coherence without any dynamics, thus opening the way to pseudo-static quantum random access memory and non-invasive biosensors.

References in corpus (25)

• Sensing electric fields using single diamond spins
• Heralded entanglement between solid-state qubits separated by 3 meters
• Holonomic Quantum Computation
• Universal dynamical decoupling of a single solid-state spin from a spin bath
• Geometric quantum computation with NMR
• Solid-state electronic spin coherence time approaching one second
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• Extending Quantum Coherence in Diamond
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• Quantum many-body theory of qubit decoherence in a finite-size spin bath
• Bang-bang control of fullerene qubits using ultra-fast phase gates
• Electron spin decoherence of single Nitrogen-Vacancy defects in diamond
• Demonstration of entanglement-by-measurement of solid state qubits
• Robustness of non-adiabatic holonomic gates
• Coherent transfer of light polarization to electron spins in a semiconductor
• Observation of anomalous decoherence effect in a quantum bath at room temperature
• Strong driving of a single spin using arbitrarily polarized fields
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Cited by in corpus (11)

• Optical holonomic single quantum gates with a geometric spin under a zero field
• Polarization- and frequency-tunable microwave circuit for selective excitation of nitrogen-vacancy spins in diamond
• Zero- and Low-Field Sensing with Nitrogen Vacancy Centers
• Optimization of the coherence properties of diamond samples with an intermediate concentration of NV centers
• Dynamical decoupling of a geometric qubit
• Magnetic field noise analyses generated by the interactions between a nitrogen vacancy center diamond and surface and bulk impurities
• Two-step frequency conversion for connecting distant quantum memories by transmission through an optical fiber
• Phased Geometric Controls of V-Shaped Three-Level System for Zero-field Quantum Sensing
• High-resolution spectroscopy of a single nitrogen-vacancy defect at zero magnetic field
• Controlling discrete time crystals via single-site operations in zero-field diamond quantum simulators
• Fast Phase-manipulation of the Single Nuclear Spin in Solids by Rotating Fields