Optical Quantum Computing

By Jeremy Lloyd O'Brien. Science, 2007

1,162 citations recorded by the source corpus.

In 2001, all-optical quantum computing became feasible with the discovery that scalable quantum computing is possible using only single-photon sources, linear optical elements, and single-photon detectors. Although it was in principle scalable, the massive resource overhead made the scheme practically daunting. However, several simplifications were followed by proof-of-principle demonstrations, and recent approaches based on cluster states or error encoding have dramatically reduced this worrying resource overhead, making an all-optical architecture a serious contender for the ultimate goal of a large-scale quantum computer. Key challenges will be the realization of high-efficiency sources of indistinguishable single photons, low-loss, scalable optical circuits, high-efficiency single-photon detectors, and low-loss interfacing of these components.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/d067e3c0198fdfb36f01d9fde0695d1a1d6f5e9b

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In Atomic and Molecular Physics, and Optics

Citations in the corpus

An avalanche-photodiode-based photon-number-resolving detector (2008, background): “Another gate of great importance for quantum communication and computation allows extension of the distance over which entanglement can be distribute”
Quantum memories: emerging applications and recent advances (2015, background): “The development of quantum memories in waveguides or optical fibers is motivated by the desire to integrate memories into quantum photonic circuits [203, 204] or fiber-optical quantum communication networks [205].”
Simplifying quantum logic using higher-dimensional Hilbert spaces (2009, background): “Such gates are high performing, well characterized, offer fast gate speeds and have several known paths to scalable quantum computing 20,31–33 .”
Electron–phonon processes of the silicon-vacancy centre in diamond (2014, background): “ppresses eects of spectral diusion, recently enabled demonstration of two-photon interference from separated emitters [8] that is a key requirement for many quantum information processing protocols [9, 10, 11, 12]. Interfacing coherent optical transitions with long-lived spin qubits is a key challen”
Photonic quantum technologies (2009, background): “Over the past few years, single photons have emerged as a leading approac”
Nanoantennas for visible and infrared radiation (2011, background): “Due to the fact that antenna emission patterns can be tuned in such a way that radiation is emitted in specific directions with sharp angular characteristics, the use of single quantum emitters in combination with optical antennas opens up fascinating new perspectives for quantum communication and d”
Natural and artificial atoms for quantum computation (2010, background): “Realizing the nonlinearity required for entangling two qubits is challenging, so alternatives such as the teleportation of nondeterministic quantum gates have been investigated [149].”