Experimental entanglement verification and quantification via uncertainty relations
arXiv:quant-ph/0611196 · doi:10.1209/0295-5075/78/40002
Abstract
We report on experimental studies on entanglement quantification and verification based on uncertainty relations for systems consisting of two qubits. The new proposed measure is shown to be invariant under local unitary transformations, by which entanglement quantification is implemented for two-qubit pure states. The nonlocal uncertainty relations for two-qubit pure states are also used for entanglement verification which serves as a basic proposition and promise to be a good choice for verification of multipartite entanglement.
5 pages, 3 figures and 2 tables
References in corpus (18)
- Entanglement of Formation of an Arbitrary State of Two Qubits
- Separability of Mixed States: Necessary and Sufficient Conditions
- Entanglement of Orbital Angular Momentum States of Photons
- Entanglement of a Pair of Quantum Bits
- Optimization of entanglement witnesses
- Non-maximally entangled states: production, characterization and utilization
- Violation of local uncertainty relations as a signature of entanglement
- Detection of entanglement with few local measurements
- Direct detection of quantum entanglement
- Quantifying Entanglement with Witness Operators
- Concurrence of mixed multi-partite quantum states
- Stimulated emission of polarization-entangled photons
- Experimental violation of a spin-1 Bell inequality using maximally-entangled four-photon states
- When are correlations quantum? -- Verification and quantification of entanglement by simple measurements
- A device for feasible fidelity, purity, Hilbert-Schmidt distance and entanglement witness measurements
- Experimental Entanglement Distillation of Two-qubit Mixed States Under Local filtering Operations
- Estimating entanglement of unknown states
- Local uncertainty relations serving as measures of entanglement in a bipartite two-level system