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- Publisher Website: 10.1103/PhysRevA.88.022318
- Scopus: eid_2-s2.0-84884850664
- WOS: WOS:000323152700004
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Article: Quantum computations without definite causal structure
Title | Quantum computations without definite causal structure |
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Authors | |
Issue Date | 2013 |
Publisher | American Physical Society. The Journal's web site is located at http://journals.aps.org/pra/ |
Citation | Physical Review A (Atomic, Molecular and Optical Physics), 2013, v. 88 n. 2, article no. 022318 How to Cite? |
Abstract | We show that quantum theory allows for transformations of black boxes that cannot be realized by inserting the input black boxes within a circuit in a predefined causal order. The simplest example of such a transformation is the classical switch of black boxes, where two input black boxes are arranged in two different orders conditionally on the value of a classical bit. The quantum version of this transformation - the quantum switch - produces an output circuit where the order of the connections is controlled by a quantum bit, which becomes entangled with the circuit structure. Simulating these transformations in a circuit with fixed causal structure requires either postselection or an extra query to the input black boxes. ©2013 American Physical Society. |
Persistent Identifier | http://hdl.handle.net/10722/213359 |
ISSN | 2014 Impact Factor: 2.808 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Chiribella, Giulio | - |
dc.contributor.author | D'Ariano, Giacomo Mauro | - |
dc.contributor.author | Perinotti, Paolo | - |
dc.contributor.author | Valiron, Benoit | - |
dc.date.accessioned | 2015-07-28T04:07:01Z | - |
dc.date.available | 2015-07-28T04:07:01Z | - |
dc.date.issued | 2013 | - |
dc.identifier.citation | Physical Review A (Atomic, Molecular and Optical Physics), 2013, v. 88 n. 2, article no. 022318 | - |
dc.identifier.issn | 1050-2947 | - |
dc.identifier.uri | http://hdl.handle.net/10722/213359 | - |
dc.description.abstract | We show that quantum theory allows for transformations of black boxes that cannot be realized by inserting the input black boxes within a circuit in a predefined causal order. The simplest example of such a transformation is the classical switch of black boxes, where two input black boxes are arranged in two different orders conditionally on the value of a classical bit. The quantum version of this transformation - the quantum switch - produces an output circuit where the order of the connections is controlled by a quantum bit, which becomes entangled with the circuit structure. Simulating these transformations in a circuit with fixed causal structure requires either postselection or an extra query to the input black boxes. ©2013 American Physical Society. | - |
dc.language | eng | - |
dc.publisher | American Physical Society. The Journal's web site is located at http://journals.aps.org/pra/ | - |
dc.relation.ispartof | Physical Review A (Atomic, Molecular and Optical Physics) | - |
dc.title | Quantum computations without definite causal structure | - |
dc.type | Article | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1103/PhysRevA.88.022318 | - |
dc.identifier.scopus | eid_2-s2.0-84884850664 | - |
dc.identifier.volume | 88 | - |
dc.identifier.issue | 2 | - |
dc.identifier.spage | article no. 022318 | - |
dc.identifier.epage | article no. 022318 | - |
dc.identifier.eissn | 1094-1622 | - |
dc.identifier.isi | WOS:000323152700004 | - |
dc.identifier.issnl | 1050-2947 | - |