6533b826fe1ef96bd1283e54
RESEARCH PRODUCT
Reducing quantum control for spin - spin entanglement distribution.
Francesco CiccarelloG. Massimo PalmaMauro PaternostroMichelangelo Zarconesubject
PhysicsQuantum PhysicsPhotonCondensed Matter - Mesoscale and Nanoscale PhysicsSpinsDephasingquantum information theory transport in mesoscopic systemsFOS: Physical sciencesGeneral Physics and AstronomyQuantum entanglementQuantum dotQuantum mechanicsMesoscale and Nanoscale Physics (cond-mat.mes-hall)Singlet stateQuantum Physics (quant-ph)QuantumSpin-½description
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 against 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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2009-01-01 |