High-speed linear optics quantum computing using active feed-forward
| dc.creator | Prevedel, Robert | |
| dc.creator | Walther, Philip | |
| dc.creator | Tiefenbacher, Felix | |
| dc.creator | Böhi, Pascal | |
| dc.creator | Kaltenbaek, Rainer | |
| dc.creator | Jennewein, Thomas | |
| dc.creator | Zeilinger, Anton | |
| dc.date | 2007-01-04 | |
| dc.date.accessioned | 2026-07-07T07:38:38Z | |
| dc.date.available | 2026-07-07T07:38:38Z | |
| dc.description | As information carriers in quantum computing, photonic qubits have the advantage of undergoing negligible decoherence. However, the absence of any significant photon-photon interaction is problematic for the realization of non-trivial two-qubit gates. One solution is to introduce an effective nonlinearity by measurements resulting in probabilistic gate operations. In one-way quantum computation, the random quantum measurement error can be overcome by applying a feed-forward technique, such that the future measurement basis depends on earlier measurement results. This technique is crucial for achieving deterministic quantum computation once a cluster state (the highly entangled multiparticle state on which one-way quantum computation is based) is prepared. Here we realize a concatenated scheme of measurement and active feed-forward in a one-way quantum computing experiment. We demonstrate that, for a perfect cluster state and no photon loss, our quantum computation scheme would operate with good fidelity and that our feed-forward components function with very high speed and low error for detected photons. With present technology, the individual computational step (in our case the individual feed-forward cycle) can be operated in less than 150 ns using electro-optical modulators. This is an important result for the future development of one-way quantum computers, whose large-scale implementation will depend on advances in the production and detection of the required highly entangled cluster states. | |
| dc.description | 19 pages, 4 figures | |
| dc.identifier | https://arxiv.org/abs/quant-ph/0701017 | |
| dc.identifier | http://arxiv.org/abs/quant-ph/0701017 | |
| dc.identifier | Nature 445, 65-69 (2007) | |
| dc.identifier | doi:10.1038/nature05346 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/121162 | |
| dc.subject | Quantum Physics | |
| dc.title | High-speed linear optics quantum computing using active feed-forward | |
| dc.type | text |