Quantum parallelism of the controlled-NOT operation : An experimental criterion for the evaluation of device performance
Physical Review A. Atomic, Molecular, and Optical Physics Volume 72 Issue 2
Page 022329-1-022329-5
published_at 2005-08-19
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| File | |
| Title ( eng ) |
Quantum parallelism of the controlled-NOT operation : An experimental criterion for the evaluation of device performance
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| Creator | |
| Source Title |
Physical Review A. Atomic, Molecular, and Optical Physics
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| Volume | 72 |
| Issue | 2 |
| Start Page | 022329-1 |
| End Page | 022329-5 |
| Abstract |
It is shown that a quantum controlled-NOT gate simultaneously performs the logical functions of three distinct conditional local operations. Each of these local operations can be verified by measuring a corresponding truth table of four local inputs and four local outputs. The quantum parallelism of the gate can then be observed directly in a set of three simple experimental tests, each of which has a clear intuitive interpretation in terms of classical logical operations. Specifically, quantum parallelism is achieved if the average fidelity of the three classical operations exceeds 2/3. It is thus possible to evaluate the essential quantum parallelism of an experimental controlled-NOT gate by testing only three characteristic classical operations performed by the gate.
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| Language |
eng
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| Resource Type | journal article |
| Publisher |
American Physical Society
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| Date of Issued | 2005-08-19 |
| Rights |
Copyright (c) 2005 American Physical Society.
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| Publish Type | Version of Record |
| Access Rights | open access |
| Source Identifier |
[ISSN] 1094-1622
[DOI] 10.1103/PhysRevA.72.022329
[NCID] AA10764867
[DOI] http://dx.doi.org/10.1103/PhysRevA.72.022329
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