Generators of nonclassical states by a combination of linear coupling of boson modes, Kerr nonlinearity, and strong linear losses

Author(s)

Shchesnovich, V. S. ^[1] ; Mogilevtsev, D. ^[2]

Affiliation

^[1] Univ Fed ABC, Ctr Ciencias Nat & Humanas, BR-09210170 Santo Andre, SP - Brazil

^[2] Belarus Natl Acad Sci, Inst Phys, Minsk 220072 - Byelarus

• Document type: Journal article
• Source: Physical Review A; v. 84, n. 1 JUL 6 2011.
• Web of Science Citations: 2

Abstract

We show that the generators of quantum states of light can be built by employing the Kerr nonlinearity, a strong linear absorption or losses, and the linear coupling of optical modes. Our setup can be realized, for instance, with the use of the optical fiber technology. We consider in detail the simplest cases of three and four coupled modes, where a strongly lossy mode is linearly coupled to other linear and nonlinear modes. In the three-mode design, our scheme emulates the third-order nonlinear absorption, allowing for generation of the single-photon states, or two-photon absorption allowing the generation of the phase states. In the four-mode design, the scheme emulates a nonlocal absorption which produces an entangled state of two uncoupled modes. We also note that in the latter case and in the case of phase state generation the output state is in the linear mode, which prevents its subsequent degradation by strong losses accompanying a strong Kerr nonlinearity. (AU)

• FAPESP's process: 10/16858-6 - Mesoscopic systems on the interface of the quantum and classical behavior
• Grantee: Valery Shchesnovich
• Support Opportunities: Regular Research Grants