Local observables for entanglement witnesses
arXiv:quant-ph/0211146 · doi:10.1103/PhysRevA.67.042310
Abstract
We present an explicit construction of entanglement witnesses for depolarized states in arbitrary finite dimension. For infinite dimension we generalize the construction to twin-beams perturbed by Gaussian noises in the phase and in the amplitude of the field. We show that entanglement detection for all these families of states requires only three local measurements. The explicit form of the corresponding set of local observables (quorom) needed for entanglement witness is derived.
minor corrections, title changed
References in corpus (17)
- Peres-Horodecki separability criterion for continuous variable systems
- Optimization of entanglement witnesses
- Robustness of entanglement
- Distinguishing separable and entangled states
- Non-adiabatic conditional geometric phase shift with NMR
- Using entanglement improves precision of quantum measurements
- Detection of entanglement with few local measurements
- Direct detection of quantum entanglement
- Reflections upon separability and distillability
- Characterization of separable states and entanglement witnesses
- A theorem for the beam splitter entangler
- Bell Measurements and Observables
- Entanglement and visibility at the output of a Mach-Zehnder interferometer
- Decoherence and Entanglement in Two-mode Squeezed Vacuum States
- Continuous-variable Werner state: separability, nonlocality, squeezing and teleportation
- Measuring the entanglement of bipartite pure states
- Adaptive Quantum Homodyne Tomography
Cited by in corpus (8)
- Experimental Detection of Entanglement with Polarized Photons
- A study of LOCC-detection of a maximally entangled state using hypothesis testing
- Optimal estimation of entanglement
- The role of initial entanglement and nonGaussianity in the decoherence of photon number entangled states evolving in a noisy channel
- Group theoretical study of LOCC-detection of maximally entangled state using hypothesis testing
- Non separable Werner states in spontaneous parametric down-conversion
- Quantum entanglement of decohered two-mode squeezed states in absorbing and amplifying environment
- Discrete realization of group symmetric LOCC-detection of maximally entangled state