Physics – Quantum Physics
Scientific paper
2011-01-10
Physics
Quantum Physics
19 pages, 12 figures, and 7 tables. In the version 2, I corrected a mistake in writing in Eq.(2.4), made the publication infor
Scientific paper
This paper is devoted to a study of a kind of chirality appearing in a model in cavity or circuit quantum electrodynamics. The model especially describes an artificial atom fully coupled to a 1-mode photon in a cavity. This chirality is played in the fully coupled (FC) Hamiltonian by two modified Jaynes-Cummings (JC) Hamiltonians. The modified JC Hamiltonian as well as the standard one has the superradiant ground state energy for sufficiently large coupling strength. The superradiance is caused by a phase transition found by Preparata, called the Dicke-Preparata (DP) superradiance. Using the one common Hamiltonian formalism with the chirality, we theoretically prove the followings: (i) when the coupling strength makes the weak or standard strong coupling regime, the ground state energy of the FC Hamiltonian can be well approximated with that of the standard and modified JC Hamiltonians since the chirality does not work in the regime; (ii) once the coupling strength plunges into the ultra-strong coupling regime, the effect of the chirality is turned on and works in the ground state energy of the FC Hamiltonian. That is, there is a kind of a phase transition concerning the chirality associated with the DP superradiance between the strong coupling regime and the ultra-strong coupling one.
No associations
LandOfFree
Another Chilarity Quantum Phase Transition in the Atom-Cavity Interaction does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Another Chilarity Quantum Phase Transition in the Atom-Cavity Interaction, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Another Chilarity Quantum Phase Transition in the Atom-Cavity Interaction will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-456242