https://doi.org/10.1140/epjd/e2010-00226-1
Universal quantum Controlled-NOT gate
1
Max-Planck-Institut für Kernphysik, Postfach 103980, 69029 Heidelberg, Germany
2
Physikalisches Institut, Heidelberg Universität, 69120 Heidelberg, Germany
3
Department of Physics, PO Box 3000, 90014 University of, Oulu, Finland
4
GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
Corresponding author: a siomau@physi.uni-heidelberg.de
Received:
24
May
2010
Revised:
26
July
2010
Published online:
14
September
2010
An investigation of an optimal universal unitary Controlled-NOT gate that performs a specific operation on two unknown states of qubits taken from a great circle of the Bloch sphere is presented. The deep analogy between the optimal universal C-NOT gate and the `equatorial' quantum cloning machine (QCM) is shown. In addition, possible applications of the universal C-NOT gate are briefly discussed.
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2010
