Postselection-induced entanglement swapping from a vacuum-excitation entangled state to separate quantum systems

2014/06/04 by Antonio Di Lorenzo · 4 citations
Computer Science · Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Physics #Postselection #Quantum #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum entanglement #Quantum mechanics #Quantum network #Quantum sensor #Superposition principle #W state #cond-mat.mes-hall #physics.optics #quant-ph

paper · pdf · doi:10.1103/physreva.90.022121

published in Physical Review A 90(2) (American Physical Society)

arxiv created 2014/06/04 · openalex publication_date 2014/08/26 · arxiv updated 2014/09/05 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We show that a single particle in a superposition of different paths can entangle two objects located on each path. The entanglement has its maximum visibility for intermediate coupling strengths. In particular, when the two quantum systems with which the particle interacts are detectors that measure its presence and its polarization, a peculiar situation of entanglement in two separated systems that have never mutually interacted is realized.

Citations

• Complex weak values in quantum measurement
• Quantum Cheshire Cats
• Complete characterization of post-selected quantum statistics using weak measurement tomography
• State tomography via weak measurements
• Separability Criterion for Density Matrices
• Weak measurement: Effect of the detector dynamics
• Measuring Ultrasmall Time Delays of Light by Joint Weak Measurements
• Separability of mixed states: necessary and sufficient conditions