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Article overview
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Reducing quantum control for spin-spin entanglement distribution | | Francesco Ciccarello
; Mauro Paternostro
; G. Massimo Palma
; M. Zarcone
; | | Date: |
4 Sep 2009 | | Abstract: | We present a protocol that sets maximum stationary entanglement between
remote spins through scattering of mobile mediators without initialization,
post-selection or feedback of the mediators’ state. No time-resolved tuning is
needed and, counterintuitively, the protocol generates two-qubit singlet states
even when classical mediators are used. The mechanism responsible for such
effect is resilient to non-optimal coupling strengths and dephasing affecting
the spins. The scheme uses itinerant particles and scattering centres and can
be implemented in various settings. When quantum dots and photons are used a
striking result is found: injection of classical mediators, rather than quantum
ones, improves the scheme efficiency. | | Source: | arXiv, 0909.0832 | | Services: | Forum | Review | PDF | Favorites | |
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