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We report two-photon resonance fluorescence of an individual semiconductor artificial atom. By non-linearly driving a single quantum dot via a two-photon transition, we probe the linewidth of the two-photon processes and show that, similar…

Mesoscale and Nanoscale Physics · Physics 2016-04-20 P. -L. Ardelt , M. Koller , T. Simmet , L. Hanschke , A. Bechtold , A. Regler , J. Wierzbowski , H. Riedl , K. Müller , J. J. Finley

We study theoretically the radiative recombination of excitons in double quantum dots in the presence of carrier-phonon coupling. We show that the phonon-induced pure dephasing effects and transitions between the exciton states strongly…

Mesoscale and Nanoscale Physics · Physics 2012-01-20 Pawel Karwat , Anna Sitek , Pawel Machnikowski

We report a comprehensive Raman study of the phonon behaviour in PdSe$_2$ in the temperature range of 5 K to 300 K. A remarkable change in the Raman spectrum is observed at 120 K: a significant enhancement of the out-of-plane phonon…

We provide a self-contained review of master equation approaches to modelling phonon effects in optically driven self-assembled quantum dots. Coupling of the (quasi) two-level excitonic system to phonons leads to dissipation and dephasing,…

Mesoscale and Nanoscale Physics · Physics 2016-06-14 Ahsan Nazir , Dara P. S. McCutcheon

In this work, we investigate the emission properties of double quantum dot driven by a monochromatic electromagnetic field, while undergoing resonant tunneling and dissipation by phonons. We found emission spectra for both cases, with and…

Quantum Physics · Physics 2016-08-05 Jonathan C. Lemus , Hanz Y. Ramírez

In this work, dissipative effects from a phonon bath on the resonance fluorescence of a solid state two level system embedded in a high quality semiconductor microcavity and driven by an intense laser, are investigated. Within the density…

Mesoscale and Nanoscale Physics · Physics 2018-12-05 Oscar J. Gómez-Sánchez , Hanz Y. Ramírez

We study the effect of phonons on a proposed scheme for the direct measurement of two-electron spin states in a double quantum dot by monitoring the the noise of the current flowing through a quantum point contact coupled to one of the…

Quantum Physics · Physics 2015-04-01 Katarzyna Roszak , Łukasz Marcinowski , Paweł Machnikowski

We investigate the temperature dependence of photon coherence properties through two photon interference (TPI) measurements from a single QD under resonant excitation. We show that the loss of indistinguishability is only related to the…

The cooling effects of a nonlinear quantum oscillator via its interaction with an artificial atom (qubit) are investigated. The quantum dissipations through the environmental reservoir of the nonlinear oscillator are included, taking into…

Quantum Physics · Physics 2015-05-18 Mihai A. Macovei , Xiao-Tao Xie

The coupling between single-photon emitters and phonons opens many possibilities to store and transmit quantum properties. In this paper we apply the independent boson model to describe the coupling between an optically driven two-level…

Mesoscale and Nanoscale Physics · Physics 2019-07-18 Thilo Hahn , Daniel Groll , Tilmann Kuhn , Daniel Wigger

We apply an intense infrared laser pulse in order to perturb the electronic and vibrational states in the three-dimensional charge density wave material 1$T$-VSe$_2$. Ultrafast snapshots of the light-induced hot carrier dynamics and…

We investigate the non-monotonic temperature sensitivity of a coherently driven two-level quantum system coupled to an Ohmic phonon environment. By employing a unitary polaron transformation, we account for phonon-induced renormalization…

Quantum Physics · Physics 2026-04-17 Yildiz Berk Ates

The coupling between a two-level system and its environment leads to decoherence. Within the context of coherent manipulation of electronic or quasiparticle states in nanostructures, it is crucial to understand the sources of decoherence.…

Mesoscale and Nanoscale Physics · Physics 2015-05-27 P. Roulleau , S. Baer , T. Choi , F. Molitor , J. Güttinger , T. Müller , S. Dröscher , K. Ensslin , T. Ihn

We investigate the resonant cooling phenomena of a driven two-level radiator embedded in a photonic crystal structure. We find that cooling occurs even at laser-atom-frequency resonance. This happens due to the atomic dressed-states…

Quantum Physics · Physics 2015-06-18 Marcela Cerbu , Mihai A. Macovei , Gao-xiang Li

Luminescence properties of colloidal quantum dots have found applications in imaging, light-sources, and displays. Despite wide interest, several experimental observations from these quantum dots, such as the short lifetime on the scale of…

Mesoscale and Nanoscale Physics · Physics 2018-06-05 Meenakshi Khosla , Sravya Rao , Shilpi Gupta

We investigate statistics of the photon (phonon) field undergoing linear and nonlinear damping processes. An effective two-photon (phonon) nonlinear "cooling by heating" process is realized from linear damping by spectral filtering of the…

Quantum Physics · Physics 2022-01-06 M. Tahir Naseem , Özgür E. Müstecaplıoğlu

Organic molecules have recently gained attention as novel sources of single photons. We present a joint experiment--theory analysis of the temperature-dependent emission spectra, zero-phonon linewidth, and second-order correlation function…

The femtosecond optical pump-probe technique was used to study dynamics of photoexcited electrons and coherent optical phonons in transition metals Zn and Cd as a function of temperature and excitation level. The optical response in time…

Strongly Correlated Electrons · Physics 2009-11-11 Muneaki Hase , Kunie Ishioka , Jure Demsar , Kiminori Ushida , Masahiro Kitajima

Dynamical back-action cooling of phonons in optomechanical systems having one optical mode is well studied. Systems with two optical modes have the potential to reach significantly higher cooling rate through resonant enhancement of both…

Optics · Physics 2017-01-18 Seunghwi Kim , Gaurav Bahl

We report a Raman study of the effect of temperature on the self-energies of optical phonons in a number of transition metals with hexagonal-close-packed structure. Anisotropic softening of phonon energies and narrowing of phonon linewidths…

Materials Science · Physics 2017-01-04 Yu. S. Ponosov , S. V. Streltsov
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