Physics – Quantum Physics
Scientific paper
2004-09-30
Phys. Rev. A 72, 022304 (2005)
Physics
Quantum Physics
9 pages
Scientific paper
10.1103/PhysRevA.72.022304
The slogan "information is physical" has been so successful that it led to some excess. Classical and quantum information can be thought of independently of any physical implementation. Pure information tasks can be realized using such abstract c- and qu-bits, but physical tasks require appropriate physical realizations of c- or qu-bits. As illustration we consider the problem of communicating chirality. We discuss in detail the physical resources this necessitates, and introduce the natural concept of "quantum gloves", i.e. rotationally invariant quantum states that encode as much as possible the concept of chirality and nothing more.
Collins Daniel
Diosi Lajos
Gisin Nicolas
Massar Serge
Popescu Sandu
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