Entangled quantum probes for dynamical environmental noise
arXiv:1503.03402 · doi:10.1103/PhysRevA.92.010302
Abstract
We address the use of entangled qubits as quantum probes to characterize the noise induced by complex environments. In particular, we show that a joint measurement on entangled probes can improve estimation of the correlation time for a broad class of environmental noises compared to any sequential strategy involving single qubit preparation. The enhancement appears when the noise is faster than a threshold value, a regime which may always be achieved by tuning the coupling between the quantum probe and the environment inducing the noise. Our scheme exploits time-dependent sensitivity of quantum systems to decoherence and does not require dynamical control on the probes. We derive the optimal interaction time and the optimal probe preparation, showing that it corresponds to multiqubit GHZ states when entanglement is useful. We also show robustness of the scheme against depolarization or dephasing of the probe, and discuss simple measurements approaching optimal precision.
4 pages + appendix, accepted version
References in corpus (4)
- High-sensitivity diamond magnetometer with nanoscale resolution
- Dynamical decoupling and noise spectroscopy with a superconducting flux qubit
- Direct Measurement of the System-Environment Coupling as a Tool For Understanding Decoherence and Dynamical Decoupling
- Effect of system level structure and spectral distribution of the environment on the decoherence rate
Cited by in corpus (35)
- Multiqubit Spectroscopy of Gaussian Quantum Noise
- Environmental noise spectroscopy with qubits subjected to dynamical decoupling
- Quantum thermometry by single-qubit dephasing
- Maximizing information on the environment by dynamically controlled qubit probes
- Spectroscopy of cross-correlations of environmental noises with two qubits
- Quantum probes for the characterization of nonlinear media
- Global and local thermometry schemes in coupled quantum systems
- Quantum metrology beyond the Quantum Cramér-Rao theorem
- Non-Markovian continuous-time quantum walks on lattices with dynamical noise
- Non-Markovian dynamics of single- and two-qubit systems interacting with Gaussian and non-Gaussian fluctuating transverse environments
- Momentum-Resolved and Correlations Spectroscopy Using Quantum Probes
- Lattice quantum magnetometry
- Estimating phase parameters of a three-level system interacting with two classical monochromatic fields in simultaneous and individual metrological strategies
- Critical metrology of minimally accessible anisotropic spin chains
- Stochastic quantum Zeno-based detection of noise correlations
- Criticality-enhanced quantum sensor at finite temperature
- Quantum routing of information using chiral quantum walks
- Quantum metrology at level anti-crossing
- Invasiveness of non-equilibrium quantum thermometry
- Criticality of environmental information obtainable by dynamically controlled quantum probes
- Continuous-variable quantum sensing of a dissipative reservoir
- Effective description of the short-time dynamics in open quantum systems
- Quantum thermometry in a squeezed thermal bath
- Quantum walker as a probe for its coin parameter
- Quantum frequency estimation with conditional states of continuously monitored independent dephasing channels
- Effects of counter-rotating-wave terms on the noisy frequency estimation
- Quantum sensing of curvature
- Noise as a resource
- The local detection method: Dynamical detection of quantum discord with local operations
- Generalized phase estimation in noisy quantum gates
- Configuration-dependent precision in magnetometry and thermometry using multi-qubit quantum sensors
- Probing multipartite entanglement, coherence and quantum information preservation under classical Ornstein-Uhlenbeck noise
- Optimizing topology for quantum probing with discrete-time quantum walks
- Metrology of weak quantum perturbations
- Quantum probes for quantum wells