Phys. Rev. A 70, 062301 (2004) [9 pages]Noise models for superoperators in the chord representationReceived 30 June 2004; published 1 December 2004 We study many-qubit generalizations of quantum noise channels that can be written as an incoherent sum of translations in phase space, for which the chord representation results specially useful. Physical descriptions in terms of the spectral properties of the superoperator and the action in phase space are provided. A very natural description of decoherence leading to a preferred basis is achieved with diffusion along a phase space line. The numerical advantages of using the chord representation are illustrated in the case of coarse-graining noise. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.70.062301
DOI:
10.1103/PhysRevA.70.062301
PACS:
03.67.Lx, 03.65.Ca, 03.65.Yz
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.