title: Decoherence-free subspaces in quantum key distribution.
abstract: We demonstrate that two recent innovations in the field of practical quantum key distribution (one-way autocompensation and passive detection) are closely related to the methods developed to protect quantum computations from decoherence. We present a new scheme that combines these advantages, and propose a practical implementation of this scheme that is feasible using existing technology.
authors.affiliation: Quantum Imaging Laboratory, Department of Electrical & Computer Engineering, Boston University, 8 Saint Mary's Street, Boston, Massachusetts 02215-2421, USA.
authors.forename: Zachary D
authors.initials: ZD
authors.lastname: Walton
authors.forename: Ayman F
authors.initials: AF
authors.lastname: Abouraddy
authors.forename: Alexander V
authors.initials: AV
authors.lastname: Sergienko
authors.forename: Bahaa E A
authors.initials: BE
authors.lastname: Saleh
authors.forename: Malvin C
authors.initials: MC
authors.lastname: Teich