Distillation of Entanglement between Distant Systems by Repeated Measurements on Entanglement Mediator

Abstract

A recently proposed purification method, in which the Zeno-like measurements of a subsystem can bring about a distillation of another subsystem in interaction with the former, is utilized to yield entangled states between distant systems. It is shown that the measurements of a two-level system locally interacting with other two spatially separated not coupled subsystems, can distill entangled states from the latter irrespectively of the initial states of the two subsystems.

11 pages, 2 figures; the version accepted for publication in Phys. Rev. A

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• Efficient Generation of a Maximally Entangled State by Repeated On- and Off-Resonant Scattering of Ancilla Qubits
• Entanglement Generation by Qubit Scattering in Three Dimensions
• Robust transmission of non-Gaussian entanglement over optical fibers
• Quantum Quasi-Zeno Dynamics: Transitions mediated by frequent projective measurements near the Zeno regime
• On demand entanglement in double quantum dots via coherent carrier scattering
• Influence of dissipation on the extraction of quantum states via repeated measurements
• Estimation of the Repeatedly-Projected Reduced Density Matrix under Decoherence
• Extraction of an Entanglement by Repetition of the Resonant Transmission of an Ancilla Qubit
• Generation and stabilization of Bell states via repeated projective measurements on a driven ancilla qubit
• Distillation by repeated measurements: continuous spectrum case
• Oscillations of the purity in the repeated-measurement-based generation of quantum states
• Extraction of a squeezed state in a field mode via repeated measurements on an auxiliary quantum particle
• Entanglement Generation by a Three-Dimensional Qubit Scattering: Concurrence vs. Path (In)Distinguishability
• Sensitivity of Measurement-Based Purification Processes to Inner Interactions