https://doi.org/10.1140/epjd/e2008-00218-8
Quantum interfaces using nanoscale surface plasmons
National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, P.R. China
Corresponding author: a honghfy@163.com
Received:
23
June
2008
Revised:
21
October
2008
Published online:
28
November
2008
The strong coupling between individual optical emitters and propagating surface plasmons confined to a conducting nanotip make this system act as an ideal interface for quantum networks, through which a stationary qubit and a flying photon (surface plasmon) qubit can be interconverted via a Raman process. This quantum interface paves the way for many essential functions of a quantum network, including sending, receiving, transferring, swapping, and entangling qubits at distributed quantum nodes as well as a deterministic source and an efficient detector of a single-photon. Numerical simulation shows that this scheme is robust against experimental imperfections and has high fidelity. Furthermore, being smaller this interface would significantly facilitate the scalability of quantum computers.
PACS: 03.67.-a – Quantum information / 03.67.Hk – Quantum communication / 73.20.Mf – Collective excitations / 42.50.-p – Quantum optics
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2008
