Effect of pure dephasing on the Jaynes-Cummings nonlinearities

González-Tudela, Alejandro; Valle, Elena del; Cancellieri, E.; Tejedor, C.; Sanvitto, D.; Laussy, Fabrice P.

doi:10.1364/oe.18.007002

Cited by 33 publications

(37 citation statements)

References 37 publications

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“…Qualitatively similar results were recently shown in [13,37]. Indeed, in the spontaneous emission regime the device produces streams of single photons, and the emitted field is antibunched [38].…”

Section: B Single Two-level Emitter Lasing Criteriasupporting

confidence: 83%

“…In the single atom device, it has been predicted by [13,37,42], and maybe experimentally observed in [41], that at low pump power the spectrum consists in a series of peaks (the so-called "Jaynes-Cummings forks" [13]). The authors of [41] have talked about a "coexistence of the strong coupling regime and the lasing regime".…”

Section: B Single Two-level Emitter Lasing Criteriamentioning

confidence: 99%

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Controlling the dynamics of a coupled atom-cavity system by pure dephasing

et al. 2010

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The influence of pure dephasing on the dynamics of the coupling between a two-level atom and a cavity mode is systematically addressed. We have derived an effective atom-cavity coupling rate that is shown to be a key parameter in the physics of the problem, allowing to generalize the known expression for the Purcell factor to the case of broad emitters, and to define strategies to optimize the performances of broad emitters-based single photon sources. Moreover, pure dephasing is shown to be able to restore lasing in presence of detuning, a further demonstration that decoherence can be seen as a fundamental resource in solid-state cavity quantum electrodynamics, offering appealing perspectives in the context of advanced nano-photonic devices. We propose experimental strategies to develop a new type of versatile device that can be operated either as a single photon source or as a laser, based on the control by decoherence of the coupling between a single quantum dot and a solid-state cavity.

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Section: B Single Two-level Emitter Lasing Criteriasupporting

confidence: 83%

Section: B Single Two-level Emitter Lasing Criteriamentioning

confidence: 99%

Controlling the dynamics of a coupled atom-cavity system by pure dephasing

et al. 2010

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“…This is not surprising in view of the long distance from the QDs to the cavity center. However, recent theoretical work 25,26 has shown that, under incoherent pumping, strong coupling can hold in the absence of a visible anticrossing due to decoherence-induced broadening of the lines. The individual QD coupling to the cavity is shown by temperature tuning of the QD excitons into resonance with the CM.…”

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confidence: 99%

Optical coupling of two distant InAs/GaAs quantum dots by a photonic-crystal microcavity

et al. 2010

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Long distance ͑1.4 m͒ interaction of two different InAs/GaAs quantum dots in a photonic crystal microcavity is observed. Simultaneous coupling of both quantum dots to the cavity is demonstrated by Purcell effect measurements. Resonant optical excitation in the p state of any of the quantum dots, results in an increase in the s-state emission of the other one. The cavity-mediated coupling can be controlled by varying the excitation intensity. These results represent an experimental step toward the realization of quantum logic operations using distant solid-state qubits. DOI: 10.1103/PhysRevB.81.193301 PACS number͑s͒: 78.67.Hc, 42.50.Ex, 78.67.De Efficient quantum information applications require qubits with low decoherence rates, fast manipulation times, and easy scalability.1 These requirements are met by qubits based on electron spins or excitons in semiconductor quantum dots ͑QDs͒. Coupling of single semiconductor QD excitons to a microcavity confined electromagnetic mode has different advantages depending on the coupling strength. Weak coupling allows enhanced optical efficiency associated to the exciton decay time reduction by the Purcell effect.2 In the strong-coupling regime, the system presents entangled lightmatter states that can be used as building blocks for transmission of quantum information, 3 qubit readout, 4 production of entangled pairs by compensation of the natural exciton fine structure splitting, 5 and lasing. 6 Single QD-cavity coupling has been demonstrated in the past years, 7-13 showing interesting cavity-quantum electrodynamics effects. The possibility of using two or more qubits coupled by a single optical microcavity is appealing for it can provide techniques for long distance, fast interactions between qubits.14-16 New dynamical phenomena are expected in these systems, which are dependent on the relative energy scales of the coupling between qubits and between qubits and the cavity mode ͑CM͒. In randomly distributed QDs samples it is statistically difficult to have two or more QDs both spatially and spectrally coupled to a microcavity mode. Some approaches have been proposed to obtain this type of coupled system, [17][18][19] which rely on the deterministic location of the QD in the cavity.12,20 Coupling of several QDs to a single cavity mode has been reported as the origin of lasing at very low threshold. 21In this Brief Report, we show that exciton states of two semiconductor quantum dots with large lateral separation interact through a microcavity confined optical mode. Individual and simultaneous coupling of the QDs to the CM is demonstrated by changes in photoluminescence ͑PL͒ emission intensity and spontaneous emission rate ͑Purcell effect͒ when the QD excitons are brought into resonance with the CM. Cavity-mediated inter-QD interaction is demonstrated by PL excitation ͑PLE͒ measurements, in which resonant excitation at the p state of any of the QDs increases the s-state emission of the other one. The microcavity-mediated interaction of the two QDs can be controlled by vary...

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“…If one disregards the phonon-induced scattering terms, these equations constitute the standard lossy Jaynes-Cummings model including pure dephasing, which has been studied intensely in recent years. [43][44][45][46][47] Let us start by discussing the terms in m (11) LA (t) in more detail, i.e., the quantities γ 12 (t) and G ≷ (t). If we compare the structure of the phonon scattering term, Eq.…”

Section: -4mentioning

confidence: 99%

Microscopic theory of phonon-induced effects on semiconductor quantum dot decay dynamics in cavity QED

et al. 2012

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We investigate the influence of the electron-phonon interaction on the decay dynamics of a quantum dot coupled to an optical microcavity. We show that the electron-phonon interaction has important consequences on the dynamics, especially when the quantum dot and cavity are tuned out of resonance, in which case the phonons may add or remove energy leading to an effective nonresonant coupling between quantum dot and cavity. The system is investigated using two different theoretical approaches: (i) a second-order expansion in the bare phonon coupling constant, and (ii) an expansion in a polaron-photon coupling constant, arising from the polaron transformation which allows an accurate description at high temperatures. In the low temperature regime we find excellent agreement between the two approaches. An extensive study of the quantum dot decay dynamics is performed, where important parameter dependencies are covered. We find that in general the electron-phonon interaction gives rise to a greatly increased bandwidth of the coupling between quantum dot and cavity. At low temperature an asymmetry in the quantum dot decay rate is observed, leading to a faster decay when the quantum dot has a larger energy than to the cavity. We explain this as due to the absence of phonon absorption processes. Furthermore, we derive approximate analytical expressions for the quantum dot decay rate, applicable when the cavity can be adiabatically eliminated. The expressions lead to a clear interpretation of the physics and emphasizes the important role played by the effective phonon density, describing the availability of phonons for scattering, in quantum dot decay dynamics. Based on the analytical expressions we present the parameter regimes where phonon effects are expected to be important. Also, we include all technical developments in appendices.

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Effect of pure dephasing on the Jaynes-Cummings nonlinearities

Cited by 33 publications

References 37 publications

Controlling the dynamics of a coupled atom-cavity system by pure dephasing

Controlling the dynamics of a coupled atom-cavity system by pure dephasing

Optical coupling of two distant InAs/GaAs quantum dots by a photonic-crystal microcavity

Microscopic theory of phonon-induced effects on semiconductor quantum dot decay dynamics in cavity QED

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