Malinovsky, Vladimir S., Sola, Ignacio R. and Vala, Jiri (2014) Phase-controlled two-qubit quantum gates. Physical Review A, 89 (032301). ISSN 1050-2947
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Abstract
We consider an implementation of a two-qubit entangling gate between trapped ions controlled by fully
overlapping laser pulses. We particularly address the role of a relative phase between the pulses in the gate
design. Though, in general, the relative phase determines the exact form of the two-qubit operation, it is shown
that it affects only its single qubit part and has no effect on its entangling content. Based on a general canonical
decomposition of the evolution operator we demonstrate that the controlled-NOT (CNOT) gate can be decomposed
in terms of a two-qubit entangled gate and single qubit phase gates. Our study shows that any relative phase
errors in two-qubit operations related to phase fluctuations of the external fields can be successfully corrected
locally by single-qubit operations, which are usually easy to implement.
Item Type: | Article |
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Keywords: | Phase-controlled; two-qubit; quantum gates; |
Academic Unit: | Faculty of Science and Engineering > Mathematical Physics |
Item ID: | 5479 |
Identification Number: | 10.1103/PhysRevA.89.032301 |
Depositing User: | Dr. Jiri Vala |
Date Deposited: | 13 Oct 2014 11:02 |
Journal or Publication Title: | Physical Review A |
Publisher: | American Physical Society |
Refereed: | Yes |
Related URLs: | |
URI: | https://mu.eprints-hosting.org/id/eprint/5479 |
Use Licence: | This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here |
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