Photonic phase gate via an exchange of fermionic spin waves in a spin chain.
We propose a new protocol for implementing the two-qubit photonic phase gate. In our approach, the π phase is acquired by mapping two single photons into atomic excitations with fermionic character and exchanging their positions. The fermionic excitations are realized as spin waves in a spin chain, while photon storage techniques provide the interface between the photons and the spin waves. Possible imperfections and experimental systems suitable for implementing the gate are discussed.
Gorshkov
Alexey V
AV
Physics Department, Harvard University, Cambridge, Massachusetts 02138, USA.
Otterbach
Johannes
J
Demler
Eugene
E
Fleischhauer
Michael
M
Lukin
Mikhail D
MD