Research Topics
		Quantum Information Processing and Communication

Summary:

The two key structural elements of quantum mechanics quantum information processing and communication are the superposition principle and the exponential scaling of the state space with the number of subsystems (partitions). These elements combine into entanglement, one of the most distincive and counterintuitive feaures of quantum mechanics. The research of this research group is dedicated to a better understanding of this resource.

Objectives:

• Exploration of the connection of quantum and classical information.
• Investigation of entanglement monotones.
• Examination of the mathematical structure of the set of entangled states.
• Investigation of multi-particle entanglement.
• Study of the implications of game theory for quantum information theory.

Participants:

Collaborations:

Results:

• K. Bostroem and T. Felbinger
  Deterministic Secure Direct Communication Using Entanglement
  Phys. Rev. Lett. 89, 187902 (2002)
  [ quant-ph/0209040 ]
   
  
• K. Bostroem and T. Felbinger
  Lossless quantum data compression
  Phys. Rev. A 65, 032313 (2002)
  [ quant-ph/0105026 ]
   
  
• K. Audenaert, J. Eisert, E. Jane, M.B. Plenio, S. Virmani, and B. de Moor,
  The asymptotic relative entropy of entanglement
  Phys. Rev. Lett. 87, 217902 (2001).
  
  
• K. J. Bostroem
  Concepts of a quantum information theory of many letters
  (2000), 21 pages, revtex, long version without figures.
  [ xxx eprint ]
  
  
• K. J. Bostroem
  Lossless quantum coding in many-letter spaces
  (2000)
  [ quant-ph/0009073 ]
   
• J. Eisert and M. Wilkens,
  Catalysis of Entanglement Manipulation for Mixed States
  Phys. Rev. Lett. 85, 437-440 (2000).
 
• J. Eisert and H.-J. Briegel,
  Quantification of Multi-Particle Entanglement
  Phys. Rev. A 64, 022306 (2001).
 
• J. Eisert, K. Jacobs, P. Papadopoulos, and M. B. Plenio,
  Optimal Local Implementation of Non-Local Quantum Gates
  Phys. Rev. A 62, 052317 (2000).
 
• J. Eisert, T. Felbinger, P. Papadopoulos, M. B. Plenio, and M. Wilkens,
  Classical Information and Distillable Entanglement
  Phys. Rev. Lett. 84, 1611-1614 (2000).
 
• J. Eisert and M. Wilkens,
  Quantum Games
  J. Mod. Opt. 47, 2543-2556 (2000).
 
• J. Eisert, M. Wilkens, and M. Lewenstein,
  Quantum Games and Quantum Strategies
  Phys. Rev. Lett. 83, 3077-3080 (1999).
 
• J. Eisert and M. B. Plenio,
  A Comparison of Entanglement Measures
  J. Mod. Opt. 46, 145-154 (1999).