************************************
               * QUANTUM OPTICS AND ATOM OPTICS *
                *        IN AUSTRALASIA        *
                 * * *                    * * *
                  *    MONTHLY NEWSLETTER    *
                   *      VOL VIII, NO 7    *
                    *                      *
                     *    July   2000      *
                      *                  *
                       * ISSN 1325-6467 *
                        *              * Edited by: Bill Munro
                         *  \   |   / *  Physics, University of Queensland,
                          *  \__|__/ *   QLD 4072, Australia.
                           *    |   *    email: billm@physics.uq.edu.au
                            *   |  *       phone: +61 7 3365 2422
                             *  | *          fax: +61 7 3365 1242
   Available on WWW at:
 http://www.physics.uq.edu.au/people/billm/qo.html 
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CONTENTS
0. PROBLEMS
1. ABSTRACTS
2. CONFERENCE ANNOUNCEMENTS
3. WANTED TO BUY/SELL
4. SITUATIONS VACANT
5. MISC NEWS

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0. EDITORIAL NOTE

Welcome to July's newsletter. Sorry for the late delivery.
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1. ABSTRACTS



Title: Quantum copying can increase the practically available information

Authors: P. Deuar and W. J. Munro
	Centre for Laser Science,Department of Physics,
	University of Queensland, QLD 4072, Brisbane, Australia
Ref: Accepted PRA (2000)

Abstract:
	While it is known that copying a quantum system does not increase the 
amount of information obtainable about the originals, it may increase the 
amount available in practice, when one is restricted to imperfect 
measurements. We present a detection scheme which using imperfect 
detectors, and possibly noisy quantum copying machines (that entangle the 
copies), allows one to extract more information from an incoming signal, 
than with the imperfect detectors alone. The case of single-photon 
detection with noisy, inefficient detectors and copiers (single 
controlled-NOT gates in this case)  is investigated in detail. The 
improvement in distinguishability between a photon and vacuum is found to 
occur for a wide range of parameters, and to be quite robust to random 
noise. The properties that a quantum copying device must have to be useful 
in this scheme are investigated.





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2. CONFERENCES / WORKSHOPS

INTERNATIONAL CONFERENCE ON EXPERIMENTAL IMPLEMENTATION OF
QUANTUM COMPUTATION (IQC 01)

IQC 01  will be held in Sydney, Australia
16-19 January 2001. The objective of the conference is to provide
an international forum to review the latest developments in the
experimental implementation of quantum computer proposals worldwide.
This will also include theoretical investigations relevant to the
various computer architectures, implementation strategies and
computer operation.
Information can be found at <http://www.snf.unsw.edu.au/~iqc01/>


______________________________________________________
Garda 2000: Mysteries, Puzzles and Paradoxes in Quantum Mechanics

this is to provide you with the web address of the Workshop
"Mysteries, Puzzles and Paradoxes in Quantum Mechanics"

http://webcesid.fisica.unimi.it/~congressi/

where you can find application form and details.

__________________________________________________________
AOS2000

The deadline for abstract submission to AOS2000 is
fast approaching. It is 31/7/00.  You can get access to the
call for papers at
http://www.physics.mq.edu.au/~aos/aos2000.htm

which also includes the form for abstract submission.