W E L C O M E | learn more |
Research Center for Quantum Information
Institute of Physics, Slovak Academy of Sciences
Dúbravská cesta 9, 84511 Bratislava, Slovakia
Tel: (+421 +2) 20910701
Fax: (+421 +2) 5477-6085
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N E W S | old news |
  1.3.2012 Conference
Since Thursday 07/06/2012 till Sunday 10/06/2012 the Smolenice castle will be hosting the 9th Central European Quantum Information Processing workshop (CEQIP 2012) focused on recent developments in the area of quantum information processing. Visit its website for more up-to-date information |+++|
  1.5.2012 Group update
Since 01/05/2012 doc. Miroslav Grajcar has (part-time) joined our group. Simultaneously, he is a lecturer at Faculty of Mathematics, Physics and Informatics of Comenius University in Bratislava. He will be leading the newly established Laboratory of low-temperature superconductors being a joint laboratory of Comenius University and Institute of Physics. The laboratory is built and equipped with the help of EU structural funds via the projects QUTE and meta-QUTE.
  1.5.2012 Group update
Dr. Stefano Fachcini has finished on 31/04/2012 his 6 months postdoctoral stay in our group. We wish him all the best in his future life.
  30.3.2012 Research paper
Memory cost of quantum protocols
We consider the problem of minimizing the ancillary systems required to realize an arbitrary strategy of a quantum protocol, with the assistance of classical memory. For this purpose we introduce the notion of memory cost of a strategy to measure the resources required in terms of ancillary dimension. We provide a condition for the cost to be equal to a given value, and we use this result to evaluate the cost in some special cases. As an example, we show that any covariant protocol for the cloning of a unitary transformation requires at most one ancillary qubit. We also prove that the memory cost has to be determined globally and cannot be calculated by optimizing the resources independently at each step of the strategy.
by Alessandro Bisio, Giacomo Mauro D'Ariano, Paolo Perinotti, Michal Sedlak
Phys. Rev. A 85, 032333 (2012) |+++|
NONE
S E M I N A R S | more |
21.05. 10:30
Tomáš Rybár (Bratislava):
Invitation to estimations of memory channels

18.06. 10:30
tba (Bratislava):
tba*

23.07. 10:30
Daniel Reitzner (Garching, Germany):
tba*
V I S I T O R S | history |
23.05-10.06 Mark Hillery
(CUNY, New York, USA)




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