Large-amplitude coherent-state superposition generated by a time-separated two-photon subtraction from a continuous-wave squeezed vacuum
Abstract
A theoretical analysis is given for a two-photon subtraction from a continuous-wave squeezed vacuum with finite time separation between two detection events. In the cw photon subtraction process, generated states are inevitably described by temporal multimode states. Our approach is based on analytical formulas that are mathematically simple and provide an intuitive understanding of the multimode structure of the system. We show that, in our process, the photon-subtracted squeezed vacuum is generated in two temporal modes and one of these modes acts as an ancillary mode to make the other one a large-amplitude coherent-state superposition.
- Publication:
-
Physical Review A
- Pub Date:
- June 2008
- DOI:
- 10.1103/PhysRevA.77.062315
- arXiv:
- arXiv:0804.0464
- Bibcode:
- 2008PhRvA..77f2315T
- Keywords:
-
- 03.67.Hk;
- 42.50.Dv;
- Quantum communication;
- Nonclassical states of the electromagnetic field including entangled photon states;
- quantum state engineering and measurements;
- Quantum Physics
- E-Print:
- 9 pages, 8 figures