Experimental implementation of the optimal linear-optical controlled phase gate
- We report on the first experimental realization of optimal linear-optical controlled phase gates for arbitrary phases. The realized scheme is entirely flexible in that the phase shift can be tuned to any given value. All such controlled phase gates are optimal in the sense that they operate at the maximum possible success probabilities that are achievable within the framework of postselected linear-optical implementations with vacuum ancillas. The quantum gate is implemented by using bulk optical elements and polarization encoding of qubit states. We have experimentally explored the remarkable observation that the optimum success probability is not monotone in the phase.
| Author details: | Karel Lemr, A. Cernoch, Jan Soubusta, Konrad Kieling, Jens Eisert, M. Dusek |
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| DOI: | https://doi.org/10.1103/PhysRevLett.106.013602 |
| ISSN: | 0031-9007 |
| Title of parent work (English): | Physical review letters |
| Publisher: | American Physical Society |
| Place of publishing: | College Park |
| Publication type: | Article |
| Language: | English |
| Year of first publication: | 2011 |
| Publication year: | 2011 |
| Release date: | 2017/03/26 |
| Volume: | 106 |
| Issue: | 1 |
| Number of pages: | 4 |
| Funding institution: | Czech Ministry of Education [1M06002, MSM6198959213, RCPTM - CZ.1.05/2.1.00/03.0058]; Czech Science Foundation [202/09/0747]; EU; EURYI; Palacky University [PrF-2010-009, PrF-2010-020] |
| Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
| Peer review: | Referiert |
