Photon Blockade in the Ultrastrong Coupling Regime

Ridolfo, A.; Leib, Martin; Savasta, Salvatore; Hartmann, Michael J.

doi:10.1103/physrevlett.109.193602

Cited by 334 publications

(405 citation statements)

References 39 publications

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“…These results are very promising for the study of light-matter interaction physics, and could lead to applications of coupled organic multiple microcavities in the ultrastrong light-matter coupling regime for the constituent microcavities at room temperature, for example in organic microcavity LEDs, where the coupling effect can narrow the linewidth of emission 23 . The coupled cavity is also an interesting system for realizing photon blockades in the ultrastrong coupling regime 40 .…”

Section: Discussionmentioning

confidence: 99%

Coupling of exciton-polaritons inlow−Qcoupled microcavities beyond the rotating wave approximation

et al. 2015

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We have demonstrated coupling between a pair of ultrastrong light-matter coupled microcavities composed of neat glassy organic dye films between metallic (silver) mirrors at room temperature. Based upon our modified coupled oscillator model, we have observed that the degeneracy between the Rabi splittings associated with the symmetric and antisymmetric cavity modes is broken by the higher-order anti-resonant terms in the Hamiltonian associated with the breakdown of the rotating wave approximation in the ultrastrong coupling regime. These results are in quantitative agreement with both experiment and transfer matrix modeling. The component cavities are characterized by Q factors around 12 and display a large vacuum Rabi splitting around 1.12 eV between the upper and lower polariton branches, which is about 52% of the excited state energy, thus indicating ultrastrong coupling in each individual cavity. This large splitting is due to the large oscillator strength of the neat dye glass. We have also observed large polariton-induced incidence-side asymmetry in reflection spectra in a coupled cavity pair with one cavity having no exciton.

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Section: Discussionmentioning

confidence: 99%

Coupling of exciton-polaritons inlow−Qcoupled microcavities beyond the rotating wave approximation

et al. 2015

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“…Therefore, the solution has a residual oscillation at the driving frequency ω d even in the t → ∞ limit. The steady-state properties are then obtained by averaging the solution over several driving periods, which corresponds to a time integrated measurement in an actual experiment [34]. …”

Section: Theoretical Frameworkmentioning

confidence: 99%

“…A description of the cavity QED system based on the Rabi model, whose spectrum and eigenstates have been a subject of intensive studies [23,[26][27][28][29][30], is therefore necessary. In order to investigate output photon correlations, which are experimentally relevant for many setups, several works have also considered drivendissipative scenarios [31][32][33][34][35]. They have shown that in the ultrastrong coupling regime, the usual quantum optical master equation and input-output relations led to unphysical predictions and had to be modified.…”

Section: Introductionmentioning

confidence: 99%

“…It was shown in Ref. [34] that there is no qualitative change in the output-photon statistics when the coupling strength is of the order of 10% of the cavity frequency, except when a bias on the qubit, which breaks explicitly the parity symmetry of the Rabi model, is introduced. In the latter case, an output-photon statistics that is significantly different from the standard scenario based on the JC model is predicted.…”

Section: Introductionmentioning

confidence: 99%

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Fate of photon blockade in the deep strong-coupling regime

Boité¹,

Hwang²,

Nha³

et al. 2016

Phys. Rev. A

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We investigate the photon emission properties of the driven-dissipative Rabi model in the socalled ultrastrong and deep strong coupling regimes, where the atom-cavity coupling rate g becomes comparable or larger than the cavity frequency ωc. By solving numerically the master equation in the dressed-state basis, we compute the output field correlation functions in the steady-state for a wide range of coupling rates. We find that, as the atom-cavity coupling strength increases, the system undergoes multiple transitions in the photon statistics. In particular, a first sharp anti-bunching to bunching transition, occurring at g ∼ 0.45ωc, leading to the breakdown of the photon blockade due to the counter-rotating terms, is shown to be the consequence of a parity shift in the energy spectrum. A subsequent revival of the photon blockade and the emergence of the quasi-coherent statistics, for even larger coupling rates, are attributed to an interplay between the nonlinearity in the energy spectrum and the transition rates between the dressed states.

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“…This limit is specifically accessible in this frequency range because of the successful implementation of metallic cavities with strongly subwavelength effective volumes [10] which can be combined with quantum heterostructures in semconductors to form hybrid systems [11,12]. In this limit, diverse quantum phenomena have been predicted, such as two-mode squeezing as a consequence of the counter-rotating coupling terms [13], photon blockade [14], conversion from virtual to real photons [15], and decoupling of light and matter for the deep strong coupling regime [16].…”

Section: Introductionmentioning

confidence: 99%

Subcycle measurement of intensity correlations in the terahertz frequency range

et al. 2016

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The Terahertz frequency range bears intriguing opportunities, beyond very advanced applications in spectroscopy and matter control. Peculiar quantum phenomena are predicted to lead to light emission by non-trivial mechanisms. Typically, such emission mechanisms are unraveled by temporal correlation measurements of photon arrival times, as demonstrated in their pioneering work by Hanbury Brown and Twiss. So far, the Terahertz range misses an experimental implementation of such technique with very good temporal properties and high sensitivity. In this paper, we propose a room-temperature scheme to measure photon correlations at THz frequencies based on electro-optic sampling. The temporal resolution of 146 fs is faster than one cycle of oscillation and the sensitivity is so far limited to ∼1500 photons. With this technique, we measure the photon statistics of a THz quantum cascade laser. The proposed measurement scheme allows, in principle, the measurement of ultrahigh bandwidth photons and paves the way towards THz quantum optics.

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Photon Blockade in the Ultrastrong Coupling Regime

Cited by 334 publications

References 39 publications

Coupling of exciton-polaritons inlow−Qcoupled microcavities beyond the rotating wave approximation

Coupling of exciton-polaritons inlow−Qcoupled microcavities beyond the rotating wave approximation

Fate of photon blockade in the deep strong-coupling regime

Subcycle measurement of intensity correlations in the terahertz frequency range

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