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Article: Indefinite causal order enables perfect quantum communication with zero capacity channels
Title | Indefinite causal order enables perfect quantum communication with zero capacity channels |
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Authors | |
Issue Date | 2021 |
Publisher | IOP Publishing: Open Access Journals. The Journal's web site is located at http://iopscience.iop.org/1367-2630/ |
Citation | New Journal of Physics, 2021, v. 23, p. article no. 033039 How to Cite? |
Abstract | Quantum mechanics is compatible with scenarios where the relative order between two events can be indefinite. Here we show that two independent instances of a noisy process can behave as a perfect quantum communication channel when used in a coherent superposition of two alternative orders. This phenomenon occurs even if the original process has zero capacity to transmit quantum information. In contrast, perfect quantum communication does not occur when the message is sent directly from the sender to the receiver through a superposition of alternative paths, with an independent noise process acting on each path. The possibility of perfect quantum communication through independent noisy channels highlights a fundamental difference between the superposition of orders in time and the superposition of paths in space. |
Persistent Identifier | http://hdl.handle.net/10722/308989 |
ISSN | 2023 Impact Factor: 2.8 2023 SCImago Journal Rankings: 1.090 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Chiribella, G | - |
dc.contributor.author | Banik, M | - |
dc.contributor.author | Bhattacharya, SS | - |
dc.contributor.author | Guha, T | - |
dc.contributor.author | Alimuddin, M | - |
dc.contributor.author | Roy, A | - |
dc.contributor.author | Saha, S | - |
dc.contributor.author | Agrawal, S | - |
dc.contributor.author | Kar, G | - |
dc.date.accessioned | 2021-12-14T01:39:07Z | - |
dc.date.available | 2021-12-14T01:39:07Z | - |
dc.date.issued | 2021 | - |
dc.identifier.citation | New Journal of Physics, 2021, v. 23, p. article no. 033039 | - |
dc.identifier.issn | 1367-2630 | - |
dc.identifier.uri | http://hdl.handle.net/10722/308989 | - |
dc.description.abstract | Quantum mechanics is compatible with scenarios where the relative order between two events can be indefinite. Here we show that two independent instances of a noisy process can behave as a perfect quantum communication channel when used in a coherent superposition of two alternative orders. This phenomenon occurs even if the original process has zero capacity to transmit quantum information. In contrast, perfect quantum communication does not occur when the message is sent directly from the sender to the receiver through a superposition of alternative paths, with an independent noise process acting on each path. The possibility of perfect quantum communication through independent noisy channels highlights a fundamental difference between the superposition of orders in time and the superposition of paths in space. | - |
dc.language | eng | - |
dc.publisher | IOP Publishing: Open Access Journals. The Journal's web site is located at http://iopscience.iop.org/1367-2630/ | - |
dc.relation.ispartof | New Journal of Physics | - |
dc.rights | This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. | - |
dc.title | Indefinite causal order enables perfect quantum communication with zero capacity channels | - |
dc.type | Article | - |
dc.identifier.email | Chiribella, G: giulio@cs.hku.hk | - |
dc.identifier.authority | Chiribella, G=rp02035 | - |
dc.description.nature | published_or_final_version | - |
dc.identifier.doi | 10.1088/1367-2630/abe7a0 | - |
dc.identifier.scopus | eid_2-s2.0-85104172072 | - |
dc.identifier.hkuros | 330858 | - |
dc.identifier.volume | 23 | - |
dc.identifier.spage | article no. 033039 | - |
dc.identifier.epage | article no. 033039 | - |
dc.identifier.isi | WOS:000631364900001 | - |
dc.publisher.place | United Kingdom | - |