Characterizing spin-bath parameters using conventional and time-asymmetric Hahn-echo sequences

Abstract

Spin-bath noise characterization, which is typically performed by multi-pulse control sequences, is essential for understanding most spin dynamics in the solid-state. Here, we theoretically propose a method for extracting the characteristic parameters of a noise source with a known spectrum, using a single modified Hahn-echo sequence. By varying the application time of the pulse, measuring the coherence curves of an addressable spin, and fitting the decay coefficients to a theoretical function derived by us, we extract parameters characterizing the physical nature of the noise. Assuming a Lorentzian noise spectrum, we illustrate this method for extracting the correlation time of a bath of nitrogen paramagnetic impurities in diamond, and its coupling strength to the addressable spin of a nitrogen-vacancy center. Considering a realistic experimental scenario with $5\%$ measurement error, the parameters can be extracted with an accuracy of $\sim 10\%$. The scheme is effective for samples having a natural homogeneous coherence time ($T_2$) up to two orders of magnitude greater than the inhomogeneous coherence time ($T_2^{\ast }$), and mitigates technical noise when further averaging is irrelevant. Beyond its potential for reducing experiment times by an order-of-magnitude, such single-pulse noise characterization could minimize the effects of long time-scale drifts and accumulating pulse imperfections and numerical errors.

References in corpus (25)

• Experimental loophole-free violation of a Bell inequality using entangled electron spins separated by 1.3 km
• High-sensitivity diamond magnetometer with nanoscale resolution
• Sensing electric fields using single diamond spins
• Heralded entanglement between solid-state qubits separated by 3 meters
• Universal dynamical decoupling of a single solid-state spin from a spin bath
• Solid-state electronic spin coherence time approaching one second
• Ultrasensitive Beam Deflection Measurement via Interferometric Weak Value Amplification
• Electron spin coherence exceeding seconds in high purity silicon
• Optical magnetic detection of single-neuron action potentials using quantum defects in diamond
• Fault-Tolerant Quantum Dynamical Decoupling
• How to Enhance Dephasing Time in Superconducting Qubits
• Temperature and magnetic field dependent longitudinal spin relaxation in nitrogen-vacancy ensembles in diamond
• Extending Quantum Coherence in Diamond
• Robust dynamical decoupling for quantum computing and quantum memory
• Demonstration of fidelity improvement using dynamical decoupling with superconducting qubits
• Enhanced solid-state multi-spin metrology using dynamical decoupling
• Optimizing a Dynamical Decoupling Protocol for Solid-State Electronic Spin Ensembles in Diamond
• Miniature cavity-enhanced diamond magnetometer
• Concatenated dynamical decoupling in a solid-state spin bath
• Maximizing information on the environment by dynamically controlled qubit probes
• Effect of pulse error accumulation on dynamical decoupling of the electron spins of phosphorus donors in silicon
• Free induction decay of single spins in diamond
• Noise spectroscopy of a quantum-classical environment with a diamond qubit
• Measuring environmental quantum noise exhibiting a non-monotonous spectral shape
• Spin ensemble-based AC magnetometry using concatenated dynamical decoupling at low temperatures

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