Quantum repeaters with photon pair sources and multimode memories.
We propose a quantum repeater protocol which builds on the well-known Duan-Lukin-Cirac-Zoller (DLCZ) protocol [L. M. Duan, M. D. Lukin, J. I. Cirac, and P. Zoller, Nature (London) 414, 413 (2001)10.1038/35106500], but which uses photon pair sources in combination with memories that allow to store a large number of temporal modes. We suggest to realize such multimode memories based on the principle of photon echo, using solids doped with rare-earth-metal ions. The use of multimode memories promises a speedup in entanglement generation by several orders of magnitude and a significant reduction in stability requirements compared to the DLCZ protocol.
Simon
Christoph
C
Group of Applied Physics, University of Geneva, Switzerland.
de Riedmatten
Hugues
H
Afzelius
Mikael
M
Sangouard
Nicolas
N
Zbinden
Hugo
H
Gisin
Nicolas
N