Practical schemes for the measurement of angular-momentum covariance matrices in quantum optics
arXiv:0806.4756 · doi:10.1103/PhysRevA.78.043814
Abstract
We develop practical schemes for the measurement of the covariance matrix for intrinsic angular-momentum variables in quantum optics. We particularize this approach to two-beam polarimetry and interferometry, as well as to ensembles of two-level atoms interacting with classical fields. We show the practical advantages of noisy simultaneous measurements.
8 pages, 5 figures. References added and minor changes. Final version
References in corpus (17)
- On the Improvement of Frequency Stardards with Quantum Entanglement
- Many-particle entanglement with Bose--Einstein condensates
- Beating the Standard Quantum Limit with Four Entangled Photons
- Polarization squeezing and continuous-variable polarization entanglement
- Polarimetric characterization of light and media
- Optimal spin squeezing inequalities detect bound entanglement in spin models
- Quantum Non-Demolition Detection of Strongly Correlated Systems
- Covariance matrices and the separability problem
- Quantitative wave-particle duality and non-erasing quantum erasure
- Nonclassical interferometry with intelligent light
- Entanglement Detection in Optical Lattices of Bosonic Atoms with Collective Measurements
- Characterizing multiparticle entanglement in symmetric N-qubit states via negativity of covariance matrices
- Characterization of quantum angular-momentum fluctuations via principal components
- Constraints on the uncertainties of entangled symmetric qubits
- Detection of Spin Correlations in Optical Lattices by Light Scattering
- Local Invariants and Pairwise Entanglement in Symmetric Multi-qubit System
- The Haroche-Ramsey experiment as a generalized measurement
Cited by in corpus (8)
- Quantum spin squeezing
- Spin squeezing and entanglement for arbitrary spin
- Measuring arbitrary-order coherences: Tomography of single-mode multiphoton polarization-entangled states
- SU(2)-invariant depolarization of quantum states of light
- Quantum Polarimetry
- Angular-momentum nonclassicality by breaking classical bounds on statistics
- Estimation of covariance matrix of macroscopic quantum states
- Exact Quantum Correlations of Conjugate Variables From Joint Quadrature Measurements