Spin-photon dynamics of quantum dots in two-mode cavities

Florian Meier and David D. Awschalom
Phys. Rev. B 70, 205329 – Published 22 November 2004

Abstract

A quantum dot interacting with two resonant cavity modes is described by a two-mode Jaynes-Cummings model. Depending on the quantum dot energy level scheme, the interaction of a singly doped quantum dot with a cavity photon generates entanglement of electron spin and cavity states or allows one to implement a SWAP gate for spin and photon states. An undoped quantum dot in the same structure generates pairs of polarization entangled photons from an initial photon product state. For realistic cavity loss rates, the fidelity of these operations is of order 80%.

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  • Received 14 May 2004

DOI:https://doi.org/10.1103/PhysRevB.70.205329

©2004 American Physical Society

Authors & Affiliations

Florian Meier* and David D. Awschalom

  • Center for Spintronics and Quantum Computation, University of California, Santa Barbara, California 93106, USA

  • *Electronic address: meier@physics.ucsb.edu
  • Electronic address: awsch@physics.ucsb.edu

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Issue

Vol. 70, Iss. 20 — 15 November 2004

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