Sudden death of entanglement in fermionic systems under collective decoherence

We analyze the dynamics of entanglement due to decoherence in a system of two identical fermions with spin 3/2 interacting with a global bosonic environment. We make use of an appropriate measure of the so-called fermionic entanglement to quantify the fermionic correlations, and compare the dynamica...

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Autores principales: Bussandri, Diego, Majtey, Ana P., Valdés Hernández, Andrea
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 2020
Materias:
Física
Quantum entanglement
Physics
Quantum decoherence
Invariant (physics)
Decoherence-free subspaces
Qubit
Sudden death
Identical particles
Quantum mechanics
Coherence (physics)
Coherence (statistics)
Spin-½
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/124540
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-124540
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Quantum entanglement
Physics
Quantum decoherence
Invariant (physics)
Decoherence-free subspaces
Qubit
Sudden death
Identical particles
Quantum mechanics
Coherence (physics)
Coherence (statistics)
Spin-½
spellingShingle Física
Quantum entanglement
Physics
Quantum decoherence
Invariant (physics)
Decoherence-free subspaces
Qubit
Sudden death
Identical particles
Quantum mechanics
Coherence (physics)
Coherence (statistics)
Spin-½
Bussandri, Diego
Majtey, Ana P.
Valdés Hernández, Andrea
Sudden death of entanglement in fermionic systems under collective decoherence
topic_facet Física
Quantum entanglement
Physics
Quantum decoherence
Invariant (physics)
Decoherence-free subspaces
Qubit
Sudden death
Identical particles
Quantum mechanics
Coherence (physics)
Coherence (statistics)
Spin-½
description We analyze the dynamics of entanglement due to decoherence in a system of two identical fermions with spin 3/2 interacting with a global bosonic environment. We make use of an appropriate measure of the so-called fermionic entanglement to quantify the fermionic correlations, and compare the dynamical effects due to decoherence with those that arise in a pair of distinguishable qubits immersed in the same environment. According to the system's initial state, three types of qualitatively different dynamics are identified: i) invariant regime, corresponding to initial states that belong to a decoherence free subspace (DFS), which maintain invariant their entanglement and coherence throughout the evolution; ii) exponential decay, corresponding to initial states orthogonal to the DFS, and evolve towards states whose entanglement and coherence decrease exponentially; iii) entanglement sudden death, corresponding to initial states that have some overlap with the DFS and exhibit a richer dynamics leading, in particular, to the sudden death of the fermionic entanglement, while the coherence decays exponentially. Our analysis offers insights into the dynamics of entanglement in open systems of identical particles and into the existence of decoherence free subspaces and entanglement sudden death in indistinguishable-fermion systems.
format Articulo
Preprint
author Bussandri, Diego
Majtey, Ana P.
Valdés Hernández, Andrea
author_facet Bussandri, Diego
Majtey, Ana P.
Valdés Hernández, Andrea
author_sort Bussandri, Diego
title Sudden death of entanglement in fermionic systems under collective decoherence
title_short Sudden death of entanglement in fermionic systems under collective decoherence
title_full Sudden death of entanglement in fermionic systems under collective decoherence
title_fullStr Sudden death of entanglement in fermionic systems under collective decoherence
title_full_unstemmed Sudden death of entanglement in fermionic systems under collective decoherence
title_sort sudden death of entanglement in fermionic systems under collective decoherence
publishDate 2020
url http://sedici.unlp.edu.ar/handle/10915/124540
work_keys_str_mv AT bussandridiego suddendeathofentanglementinfermionicsystemsundercollectivedecoherence
AT majteyanap suddendeathofentanglementinfermionicsystemsundercollectivedecoherence
AT valdeshernandezandrea suddendeathofentanglementinfermionicsystemsundercollectivedecoherence
bdutipo_str Repositorios
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