Single observable concurrence measurement without simultaneous copies

Abstract

We present a protocol that allows us to obtain the concurrence of any two qubit pure state by performing a minimal and optimal tomography of one of the subsystems through measuring a single observable of an ancillary four dimensional qudit. An implementation for a system of trapped ions is also proposed, which can be achieved with present day experimental techniques.

4 pages, 1 figure

References in corpus (6)

• Entanglement of Formation of an Arbitrary State of Two Qubits
• Distributed Entanglement
• On the Measurement of Qubits
• Measures and dynamics of entangled states
• Minimal qubit tomography
• Experimental Polarization State Tomography using Optimal Polarimeters

Cited by in corpus (5)

• On experimental procedures for entanglement verification
• Proposal for direct measurement of concurrence via visibility in a cavity QED system
• Entanglement dynamics of two-bipartite system under the influence of dissipative environments
• Quantification of Concurrence via Weak Measurement
• Direct measurement of atomic entanglement via cavity photon statistics