2009/10/29 by Vladan Panković, Pankovic, Vladan
Computer Science · Physics and Astronomy · #FOS: Physical sciences #General Physics (physics.gen-ph) #Laser-Matter Interactions and Applications #Medical Physics (physics.med-ph) #Quantum Information and Cryptography #Quantum Mechanics and Applications
paper · pdf · doi:10.48550/arxiv.0910.5606
openalex publication_date 2009/10/29 · openalex created_date 2022/10/01 · openalex updated_date 2026/07/28
In this work we consider quantum dynamical interaction of single photon with\nbeam splitter after which well-known superposition between reflected and\ntransmitted photon appears. Later reflected photon is absorbed by one and\ntransmitted photon is absorbed by other, distant of two two-level systems of\nthe same type (prepared initially in ground states). It implies entanglement\nbetween mentioned two two-level systems. Any two-level system in excited state\nrepresents an unstable system that quantum dynamically evolves in a\nsuperposition of the initial excited (non-decayed) and ground (decayed) state.\nWe consider frequent detection at only one of two two-level systems and we\nprove that here a modification of the usual quantum Zeno effect called\nsub-systemic quantum Zeno effect appears. Namely after mentioned frequent\ndetection two two-level systems are in a specific entangled state with two\nterms. First term (term of the "frozen" evolution) includes detected two-level\nsystem in initial excited state and non-detected two-level system in the ground\nstate. Second term (term of free evolution) includes detected system in ground\nstate and non-detected system in free evolved excited state.\n