Quantum vacuum properties of the intersubband cavity polariton field
By C. Ciuti, G. Bastard, I. Carusotto. 2005
534 citations recorded by the source corpus.
We present a quantum description of a planar microcavity photon mode strongly coupled to a semiconductor intersubband transition in presence of a two-dimensional electron gas. We show that, in this kind of system, the vacuum Rabi frequency ${\ensuremath{\Omega}}_{R}$ can be a significant fraction of the intersubband transition frequency ${\ensuremath{\omega}}_{12}$. This regime of ultrastrong light-matter coupling is enhanced for long-wavelength transitions, because for a given doping density, effective mass and number of quantum wells, the ratio ${\ensuremath{\Omega}}_{R}∕{\ensuremath{\omega}}_{12}$ increases as the square root of the intersubband emission wavelength. We characterize the quantum properties of the ground state (a two-mode squeezed vacuum), which can be tuned in situ by changing the value of ${\ensuremath{\Omega}}_{R}$, e.g., through an electrostatic gate. We finally point out how the tunability of the polariton quantum vacuum can be exploited to generate correlated photon pairs out of the vacuum via quantum electrodynamics phenomena reminiscent of the dynamical Casimir effect.
Subfields: Atomic and Molecular Physics, and Optics, Civil and Structural Engineering
View Paper: https://www.semanticscholar.org/paper/f6ac452c2bf2966098d946c614528f7fa42f716a
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Citations in the corpus
- Open quantum systems with local and collective incoherent processes: Efficient numerical simulations using permutational invariance (2018, unknown): “The rich phenomenology which becomes then observable [92, 96– 98, 240–259] has led to a remarkable interest in those nonperturbative regimes, which have been experimentally realized in a number of experimental implementations well described, at least in first approximation [260–264], by the Dicke mo”
- Breakdown of gauge invariance in ultrastrong-coupling cavity QED (2018, methodology): “This model predicts a superradiant phase transition (SRT) [12,13], when the collective atom-field coupling reaches the ultrastrong-coupling (USC) regime [14,15] and becomes comparable to the optical and atomic frequencies.”
- Current status of the dynamical Casimir effect (2010, background): “A possibility of emission of the infra-red photons from semiconductor microcavities with a time-modulated vacuum Rabi frequency was studied theoretically in [113,114].”