Efficient high-fidelity quantum computation using matter qubits and linear optics

By S. Barrett, Pieter Kok. 2004

522 citations recorded by the source corpus.

We propose a practical, scalable, and efficient scheme for quantum computation using spatially separated matter qubits and single-photon interference effects. The qubit systems can be nitrogen-vacancy centers in diamond, Pauli-blockade quantum dots with an excess electron, or trapped ions with optical transitions, which are each placed in a cavity and subsequently entangled using a double-heralded single-photon detection scheme. The fidelity of the resulting entanglement is extremely robust against the most important errors such as detector loss, spontaneous emission, and mismatch of cavity parameters. We demonstrate how this entangling operation can be used to efficiently generate cluster states of many qubits, which, together with single-qubit operations and readout, can be used to implement universal quantum computation. Existing experimental parameters indicate that high-fidelity clusters can be generated with a moderate constant overhead.

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

View Paper: https://www.semanticscholar.org/paper/d26bc41d6624d885e12f7e5a7f956dbe49b15edd

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In Artificial Intelligence

In Atomic and Molecular Physics, and Optics

Citations in the corpus

Determinism in the one-way model (2005, background): “The recent one-way quantum computing model [1, 2, 3] has already drawn considerable attention, mainly because it suggests different physical realisations of quantum computing [4, 5, 6, 7, 8, 9].”
Colloquium: Quantum networks with trapped ions (2010, methodology): “There are other proposals for the implementation of probabilistic gates using atomic qubits ͑Barrett and Kok, 2005; Duan et al., 2005; Lim et al., 2006͒.”
Loophole-free Bell inequality violation using electron spins separated by 1.3 kilometres (2015, methodology): “We generate entanglement between the two distant spins by entanglement swapping[16] in the Barrett-Kok scheme[26,27] using a third location C (roughly midway between A and B, see Fig.”
Laser writing of coherent colour centres in diamond (2016, background): “Realization of entangled networks for sensing or distributed quantum computing with these systems [12, 13] requires coherence of the optical transition, which some defects have displayed at cryogenic temperatures [7, 14].”
Entanglement of single-atom quantum bits at a distance (2007, unknown): “Although this entanglement method is probabilistic, it is still in principle useful for subsequent quantum operations and scalable quantum information applications 18–20 .”
Heralded entanglement between solid-state qubits separated by three metres (2012, background): “The second round not only renders the protocol robust against photon loss, but it also changes φ into a global phase, making the protocol insensitive to the optical path length difference [25].”