Phys. Rev. Lett. 87, 077901 (2001) [4 pages]Virtual Quantum SubsystemsReceived 7 March 2001; published 25 July 2001 The physical resources available to access and manipulate the degrees of freedom of a quantum system define the set A of operationally relevant observables. The algebraic structure of A selects a preferred tensor product structure, i.e., a partition into subsystems. The notion of compoundness for quantum systems is accordingly relativized. Universal control over virtual subsystems can be achieved by using quantum noncommutative holonomies © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.87.077901
DOI:
10.1103/PhysRevLett.87.077901
PACS:
03.67.Lx, 03.65.Fd, 03.65.Ud
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