Experimental demonstration of quantum logic operations using linear optical elements
✍ Scribed by J.D. Franson; B.C. Jacobs; T.B. Pittman
- Publisher
- John Wiley and Sons
- Year
- 2003
- Tongue
- English
- Weight
- 185 KB
- Volume
- 51
- Category
- Article
- ISSN
- 0015-8208
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✦ Synopsis
Abstract
Probabilistic quantum logic operations can be implemented using linear optical elements, additional photons (ancilla), and post‐selection based on the results of measurements made on the ancilla photons. Here we describe the experimental demonstration of several quantum logic devices of that kind, including a quantum parity check and a destructive controlled‐NOT (CNOT) gate. An experimental demonstration of feed‐forward control for use in quantum logic operations is also reported. The implementation of a conventional CNOT gate using polarizing beam splitters is described, along with a new “high‐fidelity” approach in which the logic gates always produce an output.