Creation of a squeezed photon distribution using artificial atoms with broken inversion symmetry

摘要

We consider a two level system with both a transversal and a longitudinalcoupling to the electromagnetic field of a resonator. Using a polarontransformation, this Hamiltonian can be mapped onto a Jaynes-CummingsHamiltonian with generalized field operators acting on the electromagneticfield in the resonator. In contrast to the usual ladder operators $a$ and$a^\dagger$, these operators exhibit a non-monotous coupling strength withrespect to the number $n$ of photons in the resonator. Especially, there areroots of the coupling between qubit and resonator at certain photon numbers$n_0$. We show, that this effect can be exploited to generate photon-numbersqueezed light, characterized by a Fano factor $F \ll 1$, with a large numberof photons (e.g. of the order of $10^4$).