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Transport through a single molecular conductor is considered, showing negative differential conductance behavior associated with phonon-mediated electron tunneling processes. This theoretical work is motivated by a recent experiment by…

Mesoscale and Nanoscale Physics · Physics 2009-11-11 Alex Zazunov , Denis Feinberg , Thierry Martin

We study transport through a double quantum dot system in which each quantum dot is coupled to a phonon mode. Such a system can be realized, e.g., using a suspended carbon nanotube. We find that the interplay between strong electron-phonon…

Mesoscale and Nanoscale Physics · Physics 2013-11-26 Stefan Walter , Björn Trauzettel , Thomas L. Schmidt

We report measurements of the Kondo effect in a double quantum dot (DQD), where the orbital states act as pseudospin states whose degeneracy contributes to Kondo screening. Standard transport spectroscopy as a function of the bias voltage…

Mesoscale and Nanoscale Physics · Physics 2013-05-30 S. Amasha , A. J. Keller , I. G. Rau , A. Carmi , J. A. Katine , H. Shtrikman , Y. Oreg , D. Goldhaber-Gordon

Optical transitions in a semiconductor quantum dot are theoretically investigated, with emphasis on the coupling to longitudinal optical phonons, and including excitonic effects. When limiting to a finite number of $m$ electron and $n$ hole…

Mesoscale and Nanoscale Physics · Physics 2009-11-11 T. Stauber , R. Zimmermann

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

We propose a scheme to realize strong photon antibunching with lower photon nonlinearity in a photonic molecule consisting of two photonic cavities, one of which contains a quantum dot (QD). This strong photon antibunching is attributed to…

Quantum Physics · Physics 2019-11-04 Xiang Cheng , Han Ye , Zhongyuan Yu

Quantum control of phonons has being become a focus of attention for developing quantum technologies. Here, we propose a proposal to realize phonon blockade in a quadratically coupled optomechanical system, where a strong nonlinear…

Quantum Physics · Physics 2018-08-15 Hong Xie , Chang-Geng Liao , Xiao Shang , Zhi-Hua Chen , Xiu-Min Lin

We theoretically study the Fano-Kondo effect in a triple quantum dot (QD) system where two QDs constitute a two-level system and the other QD works in a detector with electrodes. We found that the Fano dip is clearly modulated by strongly…

Strongly Correlated Electrons · Physics 2014-01-08 Tetsufumi Tanamoto , Yoshifumi Nishi

Semiconductor quantum dots have emerged as an especially promising platform for the generation of polarization-entangled photon pairs. However, it was demonstrated recently that the two-photon excitation scheme employed in state-of-the-art…

We investigate the Fano-type spectroscopic lineshapes of the T-shape double quantum dot coupled between the conducting and superconducting electrodes and analyze their stability on a decoherence. Because of the proximity effect the quantum…

Mesoscale and Nanoscale Physics · Physics 2012-06-01 J. Baranski , T. Domanski

Using quadratic optomechanical coupling to prepare high-purity mechanical cat states is not feasible as its strength is several orders weaker than linear optomechanical coupling. Here, using only linear coupling in a multimode system, we…

Quantum Physics · Physics 2026-05-12 Nuo Wang , Haoyang Zhang , Yu Tian , Yadi Niu , Ying Gu

Two-dimensional (2D) metals can host gapless plasmonic excitations, which strongly couple to electrons and thus may significantly affect superconductivity in layered materials. To investigate the dynamical interplay of the electron-electron…

Superconductivity · Physics 2024-08-21 Yann in 't Veld , Mikhail I. Katsnelson , Andrew J. Millis , Malte Rösner

The coherent generation of light, from masers to lasers, relies upon the specific structure of the individual emitters that lead to gain. Devices operating as lasers in the few-emitter limit provide opportunities for understanding quantum…

Mesoscale and Nanoscale Physics · Physics 2015-07-24 Y. -Y. Liu , J. Stehlik , C. Eichler , M. J. Gullans , J. M. Taylor , J. R. Petta

Quantised sound waves -- phonons -- govern the elastic response of crystalline materials, and also play an integral part in determining their thermodynamic properties and electrical response (e.g., by binding electrons into superconducting…

We demonstrate a method of tuning a semiconductor quantum dot (QD) onto resonance with a cavity mode all-optically. We use a system comprised of two evanescently coupled cavities containing a single QD. One resonance of the coupled cavity…

Mesoscale and Nanoscale Physics · Physics 2015-06-04 Ranojoy Bose , Tao Cai , Glenn. S. Solomon , Edo Waks

We present a medium-dependent quantum optics approach to describe the influence of electron-acoustic phonon coupling on the emission spectra of a strongly coupled quantum-dot cavity system. Using a canonical Hamiltonian for light…

Mesoscale and Nanoscale Physics · Physics 2011-05-03 S. Hughes , P. Yao , F. Milde , A. Knorr , D. Dalacu , K. Mnaymneh , V. Sazonova , P. J. Poole , G. C. Aers , J. Lapointe , R. Cheriton , R. L. Williams

Phonon-assisted electronic tunnelings through a vibrating quantum dot embedded between normal and superconducting leads are studied in the Kondo regime. In such a hybrid device, with the bias applied to the normal lead, we find a series of…

Strongly Correlated Electrons · Physics 2017-04-05 Zhan Cao , Tie-Feng Fang , Qing-Feng Sun , Hong-Gang Luo

Lasers differ from other light sources in that they are coherent, and their coherence makes them indispensable to both fundamental research and practical application. In optomechanical cavities, phonon and photon lasing is facilitated by…

Optics · Physics 2019-07-16 Jian Xiong , Zhilei Huang , Kaiyu Cui , Xue Feng , Fang Liu , Wei Zhang , Yidong Huang

We investigate the phenomenon of correlated emission lasing in a coherently driven single quantum dot coupled to a bimodal photonic crystal cavity, utilizing a master equation to describe the system dynamics. To account for exciton-phonon…

Quantum Physics · Physics 2024-11-19 Lavakumar Addepalli , P. K. Pathak

Quantum dots (QDs) investigated through electron transport measurements often exhibit varying, state-dependent tunnel couplings to the leads. Under specific conditions, weakly coupled states can result in a strong suppression of the…

Mesoscale and Nanoscale Physics · Physics 2018-03-07 M. -C. Harabula , V. Ranjan , R. Haller , G. Fülöp , C. Schönenberger