Nonlinear effects on the dynamics of quantum harmonic modes coupled through angular momentum
| Autor: | Canosa, N., Rossignoli, R., Garcia, Javier, Mandal, Swapan, Saha, Kartick Chandra |
|---|---|
| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Journal of Physics B: At. Mol. Opt. Phys. 53 215402 (2020) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1088/1361-6455/abb3ad |
| Popis: | We investigate nonlinear effects on the dynamics of entanglement and other quantum observables in a system of two harmonic modes coupled through angular momentum. The nonlinearity arises from a quartic anharmonic term in each mode. The emergence and evolution of entanglement, non-gaussianity, photon number, photon antibunching and squeezing are examined for different initial product coherent states and couplings, through exact diagonalization in a truncated basis. It is shown that the anharmonic terms, even if weak, can lead to very significant effects for such initial states, considerably enhancing and stabilizing entanglement and leading to a non negligible non-gaussianity of the evolved states. They also affect other observables, stabilizing the dynamics after an initial transient regime, for not too small initial average populations of each mode. Analytic short-time approximate expressions are also provided. Comment: 17 pages, 5 figures, final version |
| Databáze: | arXiv |
| Externí odkaz: |
|