Quantum computing with defects

By L. Gordon, Justin R. Weber, J. Varley, A. Janotti, David D. Awschalom, C. G. Van de Walle. Proceedings of the National Academy of Sciences of the United States of America, 2010

794 citations recorded by the source corpus.

The successful development of quantum computers is dependent on identifying quantum systems to function as qubits. Paramagnetic states of point defects in semiconductors or insulators have been shown to provide an effective implementation, with the nitrogen-vacancy center in diamond being a prominent example. The spin-1 ground state of this center can be initialized, manipulated, and read out at room temperature. Identifying defects with similar properties in other materials would add flexibility in device design and possibly lead to superior performance or greater functionality. A systematic search for defect-based qubits has been initiated, starting from a list of physical criteria that such centers and their hosts should satisfy. First-principles calculations of atomic and electronic structure are essential in supporting this quest: They provide a deeper understanding of defects that are already being exploited and allow efficient exploration of new materials systems and “defects by design.”

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

View Paper: https://www.semanticscholar.org/paper/3767324de6ed27f31cf95ea971c30a72afd5ed22

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Citations in the corpus

Quantum Chemistry in the Age of Quantum Computing. (2018, background): “atrix, and d~is a displacement vector. Doktorov et al.220 show that this corresponds to a unitary rotation U^ Dok of the bosonic ladder operators a0y= U^ y DokaU^Dok; (18) U^ Dok= S^y 0 R^ U S^ D^ ; (19) where D^ corresponds to a displacement operator dependent on d~, S^ 0 (S^ ) a squeezing operato”
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First-principles theory of the luminescence lineshape for the triplet transition in diamond NV centres (2014, background): “The success of the computational methodology developed here provides confidence that it can be fruitfully applied to other systems of high current interest that exhibit a complex vibrational structure of luminescence bands [21–26].”
Silicon carbide color centers for quantum applications (2020, background): “further, due to the possibility of growing highly pure samples [15].”
Diamond-based single-photon emitters (2011, background): “alternative systems to the most popular NV− in diamond, which should exhibit more promising optical spin read out and optical properties [215].”
Laser writing of coherent colour centres in diamond (2016, background): “can find use in quantum information technologies [1,2].”