LETTER TO THE EDITOR: Explicit effective Hamiltonians for general linear quantum-optical networks
Abstract
Linear optical networks are devices that turn classical incident modes by a linear transformation into outgoing ones. In general, the quantum version of such transformations may mix annihilation and creation operators. We derive a simple formula for the effective Hamiltonian of a general linear quantum network, if such a Hamiltonian exists. Otherwise we show how the scattering matrix of the network is decomposed into a product of three matrices that can be generated by Hamiltonians.
- Publication:
-
Journal of Optics B: Quantum and Semiclassical Optics
- Pub Date:
- January 2004
- DOI:
- 10.1088/1464-4266/6/1/L01
- arXiv:
- arXiv:quant-ph/0306123
- Bibcode:
- 2004JOptB...6L...1L
- Keywords:
-
- quantum-optical networksquantum information;
- Quantum Physics
- E-Print:
- Journal of Optics B 6, L1 (2003)