A.S.Shumovsky; "Physics of Quantum Entanglement: Quantum.." 11.05.2005

Faculty of Engineering and Natural Sciences
FENS SEMINARS

PHYSICS OF QUANTUM ENTANGLEMENT:
Quantum Fluctuations and Wigner’s Information

Alexander S. Shumovsky

Physics Department, Bilkent Uiversity
Bilkent, Ankara, Turkey
E-mail: shumo@fen.bilkent.edu.tr

Quantum entanglement is known to be the main physical resource of quantum information
processing and quantum computing. Although the pioneering papers by Einstein-Podolsky-Rosen,  Schrödinger, Bohm, and Bell have discussed the physical features of entanglement, the modern consideration is mostly related to the information aspects of this phenomenon. This has given rise to a number of misleadings such as interpretation of entanglement in terms of nonlocality and nonseparability. 

We discuss interpretation of entanglement as a manifestation of quantum fluctuations at
their extreme. In this way, we establish relation between entanglement an properties of
Wigner’s quantum information that can be extracted from microscopic measurements of physical observables peculiar to a given system about a state of this system, in which the
measurement is performed.

We illustrate discussion by number of examples related to the atomic, optical, and condensed matter physics.

May 11, 2005, 13:40-14:30, G035