Entanglement and Non-Locality in Quantum Protocols With Identical Particles
We study the role of entanglement and non-locality in quantum protocols that make use of systems of identical particles. Unlike in the case of distinguishable particles, the notions of entanglement and non-locality for systems whose constituents cannot be distinguished and singly addressed are still...
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Online Access: | https://www.mdpi.com/1099-4300/23/4/479 |
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doaj-2451601ea64d45ac971e727fb52311de2021-04-18T23:00:11ZengMDPI AGEntropy1099-43002021-04-012347947910.3390/e23040479Entanglement and Non-Locality in Quantum Protocols With Identical ParticlesFabio Benatti0Roberto Floreanini1Ugo Marzolino2Department of Physics, University of Trieste, 34151 Trieste, ItalyIstituto Nazionale di Fisica Nucleare (INFN), Sezione di Trieste, 34151 Trieste, ItalyIstituto Nazionale di Fisica Nucleare (INFN), Sezione di Trieste, 34151 Trieste, ItalyWe study the role of entanglement and non-locality in quantum protocols that make use of systems of identical particles. Unlike in the case of distinguishable particles, the notions of entanglement and non-locality for systems whose constituents cannot be distinguished and singly addressed are still debated. We clarify why the only approach that avoids incongruities and paradoxes is the one based on the second quantization formalism, whereby it is the entanglement of the modes that can be populated by the particles that really matters and not the particles themselves. Indeed, by means of a metrological and of a teleportation protocol, we show that inconsistencies arise in formulations that force entanglement and non-locality to be properties of the identical particles rather than of the modes they can occupy. The reason resides in the fact that orthogonal modes can always be addressed while identical particles cannot.https://www.mdpi.com/1099-4300/23/4/479entanglement theoryidentical particlesquantum metrologyinterferometryquantum teleportation |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Fabio Benatti Roberto Floreanini Ugo Marzolino |
spellingShingle |
Fabio Benatti Roberto Floreanini Ugo Marzolino Entanglement and Non-Locality in Quantum Protocols With Identical Particles Entropy entanglement theory identical particles quantum metrology interferometry quantum teleportation |
author_facet |
Fabio Benatti Roberto Floreanini Ugo Marzolino |
author_sort |
Fabio Benatti |
title |
Entanglement and Non-Locality in Quantum Protocols With Identical Particles |
title_short |
Entanglement and Non-Locality in Quantum Protocols With Identical Particles |
title_full |
Entanglement and Non-Locality in Quantum Protocols With Identical Particles |
title_fullStr |
Entanglement and Non-Locality in Quantum Protocols With Identical Particles |
title_full_unstemmed |
Entanglement and Non-Locality in Quantum Protocols With Identical Particles |
title_sort |
entanglement and non-locality in quantum protocols with identical particles |
publisher |
MDPI AG |
series |
Entropy |
issn |
1099-4300 |
publishDate |
2021-04-01 |
description |
We study the role of entanglement and non-locality in quantum protocols that make use of systems of identical particles. Unlike in the case of distinguishable particles, the notions of entanglement and non-locality for systems whose constituents cannot be distinguished and singly addressed are still debated. We clarify why the only approach that avoids incongruities and paradoxes is the one based on the second quantization formalism, whereby it is the entanglement of the modes that can be populated by the particles that really matters and not the particles themselves. Indeed, by means of a metrological and of a teleportation protocol, we show that inconsistencies arise in formulations that force entanglement and non-locality to be properties of the identical particles rather than of the modes they can occupy. The reason resides in the fact that orthogonal modes can always be addressed while identical particles cannot. |
topic |
entanglement theory identical particles quantum metrology interferometry quantum teleportation |
url |
https://www.mdpi.com/1099-4300/23/4/479 |
work_keys_str_mv |
AT fabiobenatti entanglementandnonlocalityinquantumprotocolswithidenticalparticles AT robertofloreanini entanglementandnonlocalityinquantumprotocolswithidenticalparticles AT ugomarzolino entanglementandnonlocalityinquantumprotocolswithidenticalparticles |
_version_ |
1721521649741725696 |