Event operators and quantum gates

Pienaar, Jacques and Ralph, Timothy C. (2010). Event operators and quantum gates. In: J. G. Hartnett and P. C. Abbott, Frontiers of Fundamental and Computational Physics: 10th International Symposium 2009. Proceedings. FFP10: Tenth International Symposium. Frontiers of Fundamental and Computational Physics 2009, Perth, WA, Australia, (160-164). 24-26 November, 2009. doi:10.1063/1.3460194


Author Pienaar, Jacques
Ralph, Timothy C.
Title of paper Event operators and quantum gates
Conference name FFP10: Tenth International Symposium. Frontiers of Fundamental and Computational Physics 2009
Conference location Perth, WA, Australia
Conference dates 24-26 November, 2009
Proceedings title Frontiers of Fundamental and Computational Physics: 10th International Symposium 2009. Proceedings   Check publisher's open access policy
Journal name AIP Conference Proceedings   Check publisher's open access policy
Place of Publication College Park, MD, United States
Publisher American Institute of Physics
Publication Year 2010
Sub-type Fully published paper
DOI 10.1063/1.3460194
Open Access Status
ISBN 9780735407930
ISSN 0094-243X
1935-0465
1551-7616
Editor J. G. Hartnett
P. C. Abbott
Volume 1246
Start page 160
End page 164
Total pages 5
Language eng
Formatted Abstract/Summary
Relativistic quantum information (RQI) is an emerging field of research dedicated to investigating quantum information protocols in a relativistic setting. Such models may give us clues about what sort of features a proper theory of quantum gravity ought to have. In this paper, we consider what happens to a quantum circuit operating in a curved spacetime background. We model the circuit using quantum optics in a Schwarzchild metric, with qubits constructed from single photons. The result is compared to an alternative model using 'event operators' in place of regular quantum optics. In this new model, field operators acting at different events in the photon's history are made to commute with each other; a requirement that has elsewhere been shown to remove paradoxes from situations where closed time-like curves are involved. Our comparison of the models reveals that the event operator model is inherently non-linear, although it gives the same predictions as normal quantum optics in most cases.
Subjects 3100 Physics and Astronomy
Keyword Entanglement
General relativity
Quantum information
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status UQ

 
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