Quantum computer networks with the orbital angular momentum of light
Abstract
Inside computer networks, different information processing tasks are necessary to deliver the user data efficiently. This processing can also be done in the quantum domain. We present simple optical quantum networks where the orbital angular momentum (OAM) of a single photon is used as an ancillary degree of freedom which controls decisions at the network level. Linear optical elements are enough to provide important network primitives such as multiplexing and routing. First we show how to build a simple multiplexer and demultiplexer which combine photonic qubits and separate them again at the receiver. We also give two different self-routing networks where the OAM of an input photon is enough to make it find its desired destination.
- Publication:
-
Physical Review A
- Pub Date:
- September 2012
- DOI:
- 10.1103/PhysRevA.86.032334
- arXiv:
- arXiv:1207.0585
- Bibcode:
- 2012PhRvA..86c2334G
- Keywords:
-
- 03.67.Hk;
- 42.50.Tx;
- 42.79.Sz;
- 84.40.Ua;
- Quantum communication;
- Optical angular momentum and its quantum aspects;
- Optical communication systems multiplexers and demultiplexers;
- Telecommunications: signal transmission and processing;
- communication satellites;
- Quantum Physics
- E-Print:
- 7 pages, 3 figures, comments welcome