Physics – Condensed Matter – Superconductivity
Scientific paper
2008-03-10
New J. Phys. 11, 023030 (2009)
Physics
Condensed Matter
Superconductivity
21 pages in preprint format, 6 figures
Scientific paper
10.1088/1367-2630/11/2/023030
We consider a system composed of a single artificial atom coupled to a cavity mode. The artificial atom is biased such that the most dominant relaxation process in the system takes the atom from its ground state to its excited state, thus ensuring population inversion. A recent experimental manifestation of this situation was achieved using a voltage-biased superconducting charge qubit. Even under the condition of `inverted relaxation', lasing action can be suppressed if the `relaxation' rate is larger than a certain threshold value. Using simple transition-rate arguments and a semiclassical calculation, we derive analytic expressions for the lasing suppression condition and the state of the cavity in both the lasing and suppressed-lasing regimes. The results of numerical calculations agree very well with the analytically derived results. We start by analyzing a simplified two-level-atom model, and we then analyze a three-level-atom model that should describe accurately the recently realized superconducting artificial-atom laser.
Ashhab Sahel
Johansson J. R.
Nori Franco
Zagoskin Alexandre M.
No associations
LandOfFree
Single-artificial-atom lasing using a voltage-biased superconducting charge qubit 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 Single-artificial-atom lasing using a voltage-biased superconducting charge qubit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Single-artificial-atom lasing using a voltage-biased superconducting charge qubit will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-378381