Quantum measurement of a mesoscopic spin ensemble

Abstract

We describe a method for precise estimation of the polarization of a mesoscopic spin ensemble by using its coupling to a single two-level system. Our approach requires a minimal number of measurements on the two-level system for a given measurement precision. We consider the application of this method to the case of nuclear spin ensemble defined by a single electron-charged quantum dot: we show that decreasing the electron spin dephasing due to nuclei and increasing the fidelity of nuclear-spin-based quantum memory could be within the reach of present day experiments.

8 pages, 2 figures; minor changes, published version

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Cited by in corpus (62)

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• Prospects for Spin-Based Quantum Computing
• Spin decoherence of a heavy hole coupled to nuclear spins in a quantum dot
• Suppressing Spin Qubit Dephasing by Nuclear State Preparation
• Electrical control of spin relaxation in a quantum dot
• Decoherence in Solid State Qubits
• Efficient Bayesian Phase Estimation
• Pure quantum dephasing of a solid state electron spin qubit in a large nuclear spin bath coupled by long-range hyperfine-mediated interactions
• Restoring Coherence Lost to a Slow Interacting Mesoscopic Bath
• Locking electron spins into magnetic resonance by electron-nuclear feedback
• Quantum many-body theory for electron spin decoherence in nanoscale nuclear spin baths
• Nuclear Spins in Nanostructures
• Quantum computing by optical control of electron spins
• Measurement of Temporal Correlations of the Overhauser Field in a Double Quantum Dot
• Exponential decay in a spin bath
• Characterization of a qubit Hamiltonian using adaptive measurements in a fixed basis
• Free-induction decay and envelope modulations in a narrowed nuclear spin bath
• Spin interactions, relaxation and decoherence in quantum dots
• Quantum Description of Nuclear Spin Cooling in a Quantum Dot
• Quantum metrology with a transmon qutrit
• Generating Entanglement and Squeezed States of Nuclear Spins in Quantum Dots
• Nuclear spin cooling using Overhauser field selective coherent population trapping
• Qubit protection in nuclear-spin quantum dot memories
• Nuclear spin dynamics and Zeno effect in quantum dots and defect centers
• Monitoring Quantum Simulators via Quantum Non-Demolition Couplings to Atomic Clock Qubits
• Coherence of a driven electron spin qubit actively decoupled from quasi-static noise
• Measurement, control, and decay of quantum-dot spins
• Large nuclear spin polarization in gate-defined quantum dots using a single-domain nanomagnet
• Semiconductor quantum ring as a solid-state spin qubit
• Witnessing quantum correlations in a nuclear ensemble via an electron spin qubit
• Single-bit Feedback and Quantum Dynamical Decoupling
• Persistent narrowing of nuclear-spin fluctuations in InAs quantum dots using laser excitation
• Quantum Control of Spin Qubits Using Nanomagnets
• Dynamics of entanglement of two electron spins interacting with nuclear spin baths in quantum dots
• Spin decoherence in graphene quantum dots due to hyperfine interaction
• Entanglement generation via a completely mixed nuclear spin bath
• Approaching a fully-polarized state of nuclear spins in a semiconductor quantum dot
• Optimizing phase estimation algorithms for diamond spin magnetometry
• Enhanced hyperfine-induced spin dephasing in a magnetic-field gradient
• Theory of box-model hyperfine couplings and transport signatures of long-range nuclear-spin coherence in a quantum-dot spin valve
• Relationship between subjecting the qubit to dynamical decoupling and to a sequence of projective measurements
• Linear Ascending Metrological Algorithm
• Suppression of electron spin decoherence in a quantum dot
• Electrical control of spin relaxation time in complex quantum nanostructures
• Characterization of a quasi-static environment with a qubit
• Maximizing the purity of a qubit evolving in an anisotropic environment
• Stabilizing nuclear spins around semiconductor electrons via the interplay of optical coherent population trapping and dynamic nuclear polarization
• Sequential quantum-enhanced measurement with an atomic ensemble
• Quantum dynamics in electron-nuclei coupled spin system in quantum dots: Bunching, revival, and quantum correlation in electron-spin measurements
• Wavelet-resolved coherence beats in the Overhauser field of a thermal nuclear spin ensemble
• Loschmidt echo driven by hyperfine and electric-quadrupole interactions in nanoscale nuclear spin baths
• How coherence measurements of a qubit steer its quantum environment
• Mesoscopic Spin Systems as Quantum Entanglers
• Proximal quantum control of spin and spin ensemble with highly localized control field from skyrmions
• Channel-based framework for phase esimation of multiple eigenvalues
• Time-adaptive phase estimation
• Theoretical aspects of quantum state transfer, correlation measurement and electron-nuclei coupled dynamics in quantum dots
• Spin bath narrowing with adaptive parameter estimation
• Quantum Dynamics of Electron-Nuclei Coupled System in Quantum Dots
• General Approach to Error Detection of Bosonic Codes via Phase Estimation