corner
corner
APS » Journals » Phys. Rev. A » Volume 71 » Issue 2
< Previous Article | Next Article >

Phys. Rev. A 71, 022304 (2005) [11 pages]

Numerical analysis of capacities for two-qubit unitary operations

Download: PDF (131 kB) Buy this article Export: BibTeX or EndNote (RIS)

Dominic W. Berry1,2 and Barry C. Sanders1,3
1Centre of Excellence for Quantum Computer Technology, Macquarie University, Sydney, New South Wales 2109, Australia
2Department of Physics, The University of Queensland, Brisbane, Queensland 4072, Australia
3Institute for Quantum Information Science, University of Calgary, Alberta T2N 1N4, Canada

Received 9 March 2004; published 10 February 2005

We present numerical results on the capacities of two-qubit unitary operations for performing communication and creating entanglement. The capacities for communication considered are based upon the increase in Holevo information of an ensemble. Our results indicate that the capacity may be accurately estimated using ensemble sizes and ancilla dimensions of 4. In addition, the calculated values of these capacities were close to, and in some cases equal to, the similarly defined entangling capacities; this result indicates connections between these capacities.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevA.71.022304
DOI:
10.1103/PhysRevA.71.022304
PACS:
03.67.Hk, 03.65.Ud
 
< Previous Article | Next Article >