Space-time qubits

J. L. Pienaar, C. R. Myers, and T. C. Ralph
Phys. Rev. A 84, 022315 – Published 8 August 2011

Abstract

We construct a qubit algebra from field creation and annihilation operators acting on a global vacuum state. Particles to be used as qubits are created from the vacuum by a near-deterministic single-particle source. Our formulation makes the space-time dependence of the qubits explicit, preparing the way for quantum computation within a field framework. The method can be generalized to deal with interacting qubits whose wave packets are not perfectly matched to each other. We give an example of how to calculate the Heisenberg evolution of a simple two-qubit circuit, taking expectation values in the field vacuum state.

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  • Received 9 January 2011

DOI:https://doi.org/10.1103/PhysRevA.84.022315

©2011 American Physical Society

Authors & Affiliations

J. L. Pienaar*, C. R. Myers, and T. C. Ralph

  • Centre for Quantum Computation and Communication Technology, School of Mathematics and Physics, The University of Queensland, Brisbane 4072, Queensland, Australia

  • *j.pienaar@physics.uq.edu.au
  • myers@physics.uq.edu.au
  • ralph@physics.uq.edu.au

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Issue

Vol. 84, Iss. 2 — August 2011

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