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Quasideterministic realization of a universal quantum gate in a single scattering process

URI
https://hdl.handle.net/10497/16664
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Type
Article
Files
 PRA-85-5-050305.pdf (205.71 KB)
Citation
Ciccarello, F., Browne, D. E., Kwek, L. C., Schomerus, H., Zarcone, M., & Bose, S. (2012). Quasideterministic realization of a universal quantum gate in a single scattering process. Physical Review A, 85(5), Article 050305. https://doi.org/10.1103/PhysRevA.85.050305
Author
Ciccarello, F.
•
Browne, D. E.
•
Kwek, Leong Chuan 
•
Schomerus, H.
•
Zarcone, M.
•
Bose, S.
Abstract
We show that a flying particle, such as an electron or a photon, scattering along a one-dimensional waveguide from a pair of static spin-1/2 centers, such as quantum dots, can implement a controlled-z gate (universal for quantum computation) between them. This occurs quasideterministically in a single scattering event, with no need for any postselection or iteration and without demanding the flying particle to bear any internal spin. We show that an easily matched hard-wall boundary condition along with the elastic nature of the process are key to such performances.
Date Issued
2012
Publisher
American Physical Society
Journal
Physical Review A
DOI
10.1103/PhysRevA.85.050305
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