Nonlinear Optics Quantum Computing with Circuit QED

Prabin Adhikari, Mohammad Hafezi, and J. M. Taylor
Phys. Rev. Lett. 110, 060503 – Published 5 February 2013

Abstract

One approach to quantum information processing is to use photons as quantum bits and rely on linear optical elements for most operations. However, some optical nonlinearity is necessary to enable universal quantum computing. Here, we suggest a circuit-QED approach to nonlinear optics quantum computing in the microwave regime, including a deterministic two-photon phase gate. Our specific example uses a hybrid quantum system comprising a LC resonator coupled to a superconducting flux qubit to implement a nonlinear coupling. Compared to the self-Kerr nonlinearity, we find that our approach has improved tolerance to noise in the qubit while maintaining fast operation.

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  • Received 15 August 2012

DOI:https://doi.org/10.1103/PhysRevLett.110.060503

© 2013 American Physical Society

Authors & Affiliations

Prabin Adhikari1, Mohammad Hafezi1,2, and J. M. Taylor1,2

  • 1Joint Quantum Institute, University of Maryland, College Park, Maryland 20742, USA
  • 2National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA

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Issue

Vol. 110, Iss. 6 — 8 February 2013

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