Correlated dephasing of two spin qubits near materials isolates rotational symmetry in nonlocal noise correlations, enabling discrimination of s-, d-, and g-wave superconducting gaps and altermagnet types at nanoscale and low frequencies.
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Reinforcement learning stabilizes more than 4 dB of fixed-axis spin squeezing under continuous nonlinear Zeeman evolution in the f=21/2 manifold of 161Dy, yielding a single-atom sensitivity of 13.9 pT/sqrt(Hz) that is 3 dB beyond the standard quantum limit.
Generalization of the one-tangle metric to higher-spin nuclei enables quantification of maximal electron-nuclear entanglement and direct computation of dephasing times in central-spin systems such as (In)GaAs quantum dots.
Experimental demonstration of quantum sensing with a central spin ensemble in hBN, mapping hyperfine interactions, achieving 80 μs coherence under dynamical decoupling and sub-microtesla AC magnetic sensitivity at 10 nm distance.
Robust optimal control algorithm using adaptive linearization of the evolution operator, sequential quadratic programming, and Legendre polynomials designs high-fidelity Bragg pulses achieving |±40 ħk⟩ transfers under 10-40% parameter variations.
Indirect measurements in quantum reservoir computing improve execution time scaling, overall performance, and memory capacity over projective measurements and classical feedback methods.
Photoelectric readout of NV centers can achieve an order of magnitude better magnetic field sensitivity than optical readout when limited by Johnson-Nyquist noise.
citing papers explorer
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Correlated Quantum Dephasometry: Symmetry-Resolved Noise Spectroscopy of Two-Dimensional Superconductors and Altermagnets
Correlated dephasing of two spin qubits near materials isolates rotational symmetry in nonlocal noise correlations, enabling discrimination of s-, d-, and g-wave superconducting gaps and altermagnet types at nanoscale and low frequencies.
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Learning Unified Control of Intrinsic Nonlinear Spin Dynamics in Atomic Qudits for Magnetometry
Reinforcement learning stabilizes more than 4 dB of fixed-axis spin squeezing under continuous nonlinear Zeeman evolution in the f=21/2 manifold of 161Dy, yielding a single-atom sensitivity of 13.9 pT/sqrt(Hz) that is 3 dB beyond the standard quantum limit.
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Quantifying electron-nuclear spin entanglement dynamics in central-spin systems using one-tangles
Generalization of the one-tangle metric to higher-spin nuclei enables quantification of maximal electron-nuclear entanglement and direct computation of dephasing times in central-spin systems such as (In)GaAs quantum dots.
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Quantum sensing with a spin ensemble in a two-dimensional material
Experimental demonstration of quantum sensing with a central spin ensemble in hBN, mapping hyperfine interactions, achieving 80 μs coherence under dynamical decoupling and sub-microtesla AC magnetic sensitivity at 10 nm distance.
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Robust Quantum Control for Bragg Pulse Design in Atom Interferometry
Robust optimal control algorithm using adaptive linearization of the evolution operator, sequential quadratic programming, and Legendre polynomials designs high-fidelity Bragg pulses achieving |±40 ħk⟩ transfers under 10-40% parameter variations.
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Harnessing quantum back-action for time-series processing
Indirect measurements in quantum reservoir computing improve execution time scaling, overall performance, and memory capacity over projective measurements and classical feedback methods.
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Impact of Photoelectric Readout Noise on Magnetic Field Sensitivity of NV Centers in Diamond
Photoelectric readout of NV centers can achieve an order of magnitude better magnetic field sensitivity than optical readout when limited by Johnson-Nyquist noise.