Sunday, November 30, 2003

Another quantum blog

Jonathan Kleid's Quantum Algorithms.

Tuesday, September 16, 2003

QubitNews: a portal with news, comments, forums, announcements, debates, and any type of information source and services from the Quantum Community - don't miss this!

Thursday, September 11, 2003

Job posting

Institut für Theoretische Physik,

Max-Planck Institut für Optik, Information und Photonik

Quantum Cryptography

(Quantum Information Theory)

Research Location: Erlangen (Germany)

Research Topic: Quantum Key Distribution

Key words: Design of efficient and practical quantum key distribution protocols.
Security evaluations, including quantum error correction techniques. Exploitation of quantum
correlations via classical communication protocols.

Within an existing DFG project and for a newly established EU funded collaboration we are
seeking to fill the following vacant positions:



(2 years, extendible for additional 2 years, BAT IIa.)

Profile: Experience in quantum information theory, interest in quantum key distribution and
quantum optical implementations. Demonstration of independent research is expected.

Direction: Coordination and derivation of security evaluations for implementations of
state-of-the-art quantum key distribution platforms.

Target starting date: January 1st, 2004.


(3 years, BAT IIa/2.)

Profile: Basic education in quantum information theory, interest in classical information theory
and quantum optical implementations.

Direction: Development of novel classical communications protocols utilizing quantum

Earliest starting date: October 1st, 2003.

Research Group: Emmy-Noether Research Group ‘Quantum Information Theory’,
Institut für Theoretische Physik, University of Erlangen-Nürnberg, Erlangen, Germany.

Our group is one of the leading groups in the theory of quantum key distribution with a strong
international reputation for the security of practical systems. The group has clear
international character. More information about our group under:

If you are interested in these openings, please contact: Dr. Norbert Lütkenhaus,

norbert.luetkenhaus -at - physik -dot- , +49-9131-852 8375

Friday, August 29, 2003

All Things Distributed: Using 3 Qubits instead of 2: "There have been reports about some interesting quantum computing progress by researchers from UCL and Oxford. Simon Benjamin and Sougato Boise have proposed a radically different quantum computer design that no longer requires on-off interactions between the qubits storing the states. Instead of relying on metal electrodes to control the interaction between two qubits sharing superposition, the new design uses a third qubit that is attuned to a different energy frequency. The middle electron responds differently to energy frequencies than does its neighbors on both sides, and the device would be able to complete all necessary logic functions necessary for quantum computing. "
QIP 2004 - the 7th workshop on Quantum Information Processing | Institute for Quantum Computing

To be held in Waterloo, Canada; hosted by the Perimeter Institute for Theoretical Physics and the Institute for Quantum Computing.

January 15 - 19, 2004

Quantum information processing is the recasting of computer science in a quantum mechanical framework. It tries to improve on classical computers and classical complexity bounds by making use of quantum mechanical phenomena. After Peter Shor's 1994 discovery of efficient quantum algorithms for factoring and the discrete log (threatening current "classical" cryptography), the field has grown explosively and is now one of the most active subfields of both computer science and physics. QIP 2004 is the seventh workshop on quantum computing, quantum cryptography, and quantum information theory in the tradition of AQIP 98 in Aarhus, AQIP 99 in Chicago, QIP 2000 in Montreal, QIP 2001 at the CWI in Amsterdam, QIP 2002 at IBM in Yorktown Heights, and QIP 2003 at MSRI, Berkeley. The conference will run from Thursday 15 January until Monday 19 January. It will consist of various invited talks, a display of posters, and an open session.

Co-chairs: Michele Mosca (IQC & PI), Daniel Gottesman (PI) and Ashwin Nayak (IQC & PI).

Steering Committee: Dorit Aharonov, Charles Bennett, Harry Buhrman, Isaac Chuang, David DiVincenzo, Miklos Santha, Umesh Vazirani, John Watrous.

Thursday, April 24, 2003

New Journal of Physics special issue on Quantum Cryptography

NJP is completely free to read and you may access all contributions to
this issue on the Web.

Focus on Quantum Cryptography Contents

Quantum key distribution over 67 km with a plug&play system
D Stucki, N Gisin, O Guinnard, G Ribordy and H Zbinden

Autocompensating quantum cryptography
Donald S Bethune and William P Risk

Practical free-space quantum key distribution over 10 km in daylight and at night
Richard J Hughes, Jane E Nordholt, Derek Derkacs and Charles G Peterson

Quantum key distribution with realistic states: photon-number statistics in the photon-number splitting attack
Norbert Lütkenhaus and Mika Jahma

Entangled-photon six-state quantum cryptography
Daphna G Enzer, Phillip G Hadley, Richard J Hughes, Charles G Peterson and Paul G Kwiat

Building the quantum network
Chip Elliott

Architectures for long-distance quantum teleportation
Jeffrey H Shapiro

Ground to satellite secure key exchange using quantum cryptography
J G Rarity, P R Tapster, P M Gorman and P Knight

Method for decoupling error correction from privacy amplification
Hoi-Kwong Lo

Thursday, April 10, 2003


The Laboratory for Research in Computer Science (LRI) affiliated with
the CNRS and the Universite Paris-Sud at Orsay, France offers one,
possibly two

One-year post-doc positions in quantum computation.

Starting date is September 2003 (negotiable). The post-doc is funded
by the European Union's Fifth Framework project RESQ (Resources for Quantum

The successful candidate will join the quantum group
( which is part of
the Algorithms and Complexity team of the LRI (
The members of the group are Christophe Durr, Julia Kempe
Sophie Laplante, Frederic Magniez, Miklos Santha and Jean-Pierre

The main research interests of the group are quantum algorithms and

Applications should be sent by March 25, 2003. Later applications will
also be accepted until the positions are filled. Please send
the following application material to

- CV, including a list of publications

- statement of interest

- 2 or 3 recent publications

- Contact information for 3 references

For more information please email

Monday, February 03, 2003

Count all the legs, divide by four

Here's a well-informed, accessible article on recent developments in quantum computing (namely, the Innsbruck experiment implementing the Deutsch-Josza algorithm). The author, Chris Wenham, wasn't able to sell it to a commercial publication, perhaps because it was too informative?

Tuesday, January 07, 2003

from Seth Lloyd to George W. Bush

This one from the Edge 2003 World Question Center:

"By their potential power, quantum computers pose a significant threat to the security not only of classified encoded material, but to the security of most commercial transactions, in particular those that take place electronically. Despite the clear application of quantum computation to problems of national security, your security agencies have elected to pursue the majority of their research on quantum computers by open competition for public funds, under the stipulation that the results of the research be published and made available to all.

This is a wise course."

Science is public knowledge. But science is not the only field where openness is important. The security failures of 9/11 were caused not by too little, but by too much secrecy. And the discussions that form public policy should be public.

I know that other advisors are offering you conflicting advice: keep your cards close to your chest—don't let our enemies (or our allies) benefit from our hard-earned knowledge. Don't listen to them. Science isn't poker: it only works when the cards are dealt face up. Don't go down in history as the Texan who closed the scientific frontier.

Benasque Quantum Information Workshop

Artur Ekert and Ignacio Cirac:

Following the editions of Benasque 1998 and 2000 we are organizing a workshop on quantum information in the summer of 2003. This is to invite you to apply using the electronic form that you can find at the website specified below. We would very much appreciate it if you could apply as soon as possible and not later than March 2003. The number of participants at the Benasque Centre at a given time is limited to about 50 and although we will do our best to accommodate most of the applicants, in some cases we may be unable to find suitable time slots for all of them, i.e. we cannot guarantee acceptance. On the other hand, participants staying for the full period will be offered an allowance of about 400 Euro. We do hope to see you in Benasque next year!

Title: Quantum Information.
Venue: Benasque in the Spanish Pyrenees.
Date: The 3 week period 22 June -- 11 July 2003.