TY  - JOUR
A1  - Tufarelli, Tommaso
A1  - Friedrich, Daniel
A1  - Groß, Heiko
A1  - Hamm, Joachim
A1  - Hess, Ortwin
A1  - Hecht, Bert
T1  - Single quantum emitter Dicke enhancement
JF  - Physical Review Research
N2  - Coupling N identical emitters to the same field mode is a well-established method to enhance light-matter interaction. However, the resulting √N boost of the coupling strength comes at the cost of a “linearized” (effectively semiclassical) dynamics. Here, we instead demonstrate a new approach for enhancing the coupling constant of a single quantum emitter, while retaining the nonlinear character of the light-matter interaction. We consider a single quantum emitter with N nearly degenerate transitions that are collectively coupled to the same field mode. We show that in such conditions an effective Jaynes-Cummings model emerges with a boosted coupling constant of order √N. The validity and consequences of our general conclusions are analytically demonstrated for the instructive case N=2. We further observe that our system can closely match the spectral line shapes and photon autocorrelation functions typical of Jaynes-Cummings physics, proving that quantum optical nonlinearities are retained. Our findings match up very well with recent broadband plasmonic nanoresonator strong-coupling experiments and will, therefore, facilitate the control and detection of single-photon nonlinearities at ambient conditions.
KW  - Cavity quantum electrodynamics
KW  - Collective effects in quantum optics
KW  - Quantum optics with artificial atoms
KW  - Superradiance & subradiance
Y1  - 2021
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-261459
VL  - 3
ER  -