Quantum metrology: why entanglement?
arXiv:1304.7609 · doi:10.1103/PhysRevA.88.042109
Abstract
We show why and when entanglement is needed for quantum-enhanced precision measurements, and which type of entanglement is useful. We give a simple, intuitive construction that shows how entanglement transforms parallel estimation strategies into sequential ones of same precision. We employ this argument to generalize conventional quantum metrology, to identify a class of noise whose effects can be easily managed, and to treat the case of indistinguishable probes (such as interferometry with light).
5 pages, 3 figures
References in corpus (13)
- General framework for estimating the ultimate precision limit in noisy quantum-enhanced metrology
- Reference frames, superselection rules, and quantum information
- The elusive Heisenberg limit in quantum enhanced metrology
- Entanglement-free Heisenberg-limited phase estimation
- Optimal Quantum Phase Estimation
- Spin squeezing, entanglement and quantum metrology with Bose-Einstein condensates
- Qubit metrology and decoherence
- Quantum-limited metrology with product states
- Sub-Heisenberg estimation strategies are ineffective
- Quantum measurement bounds beyond the uncertainty relations
- Entangled and sequential quantum protocols with dephasing
- Phase estimation with photon number constraint
- Phase variance of squeezed vacuum states
Cited by in corpus (24)
- Using entanglement against noise in quantum metrology
- Entanglement Certification From Theory to Experiment
- Quantum Advantage in Postselected Metrology
- Coherence orders, decoherence and quantum metrology
- Optimal quantum states for frequency estimation
- Achieving Heisenberg scaling with maximally entangled states: an analytic upper bound for the attainable root mean square error
- Practical Quantum Metrology in Noisy Environments
- Surpassing the Thermal Cramer-Rao Bound with Collisional Thermometry
- Entanglement in macroscopic systems
- Robustness of Quantum-Enhanced Adaptive Phase Estimation
- Modified Grover operator for amplitude estimation
- Bounding Quantum Advantages in Postselected Metrology
- Stochastic collisional quantum thermometry
- Energy-efficient quantum frequency estimation
- Usefulness of an enhanced Kitaev phase-estimation algorithm in quantum metrology and computation
- On witnessing arbitrary bipartite entanglement in a measurement device independent way
- Entanglement of particles versus entanglement of fields: independent quantum resources
- Preservation and enhancement of quantum correlations under Stark effect
- Time-adaptive phase estimation
- Contextuality Can be Verified with Noncontextual Experiments
- Information flow-enhanced precision in collisional quantum thermometry
- Coherence in quantum estimation
- Algebraic metrology: Pretty good states and bounds
- Computing partial transposes and related entanglement functions