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Excitonic states and the line shape of optical transitions in coupled quantum dots (quantum dot molecules) are studied theoretically. For a pair of electrically tunable, vertically aligned quantum dots we investigate the coupling between…

Mesoscale and Nanoscale Physics · Physics 2013-11-22 J. M. Daniels , P. Machnikowski , T. Kuhn

Establishing a highly efficient photon-emitter interface where the intrinsic linewidth broadening is limited solely by spontaneous emission is a key step in quantum optics. It opens a pathway to coherent light-matter interaction for, e.g.,…

Using a polaron master equation approach we investigate the resonance fluorescence spectra from coherently driven quantum dots (QDs) coupled to an acoustic phonon bath and a photonic crystal waveguide with a rich local density of photon…

Quantum Physics · Physics 2016-06-29 Kaushik Roy-Choudhury , Nishan Mann , Ross Manson , Stephen Hughes

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

A picosecond acoustic pulse can be used to control the lasing emission from semiconductor nanostructures by shifting their electronic transitions. When the active medium, here an ensemble of (In,Ga)As quantum dots, is shifted into or out of…

Interfacing single emitters and photonic nanostructures enables modifying their emission properties, such as enhancing individual decay rates or controlling the emission direction. To achieve full control, the single emitter must be…

Phonons strongly influence the optical control of semiconductor quantum dots. When modeling the electron-phonon interaction in several theoretical approaches the quantum dot geometry is approximated by a spherical structure, though typical…

Mesoscale and Nanoscale Physics · Physics 2018-01-17 S. Lüker , T. Kuhn , D. E. Reiter

Realising scalable quantum networks requires a meticulous level of understanding and mitigating the deleterious effects of decoherence. Many quantum device platforms feature multiple decoherence mechanisms, often with a dominant mechanism…

Quantum Physics · Physics 2023-08-17 Julian Wiercinski , Erik M. Gauger , Moritz Cygorek

We demonstrate full suppression of dephasing tied to deformation potential coupling of confined electrons to longitunidal acoustic (LA) phonons in optical control experiments on large semiconductor quantum dots (QDs) with emission…

Mesoscale and Nanoscale Physics · Physics 2020-12-07 A. Ramachandran , G. R. Wilbur , S. O'Neal , D. G. Deppe , K. C. Hall

Solid state quantum emitters have shown strong potential for applications in quantum information, but spectral inhomogeneity of these emitters poses a significant challenge. We address this issue in a cavity-quantum dot system by…

A quantum kinetic theory is used to compute excitation induced dephasing in semiconductor quantum dots due to the Coulomb interaction with a continuum of states, such as a quantum well or a wetting layer. It is shown that a frequency…

Materials Science · Physics 2009-11-10 H. C. Schneider , W. W. Chow , S. W. Koch

We study theoretically the fluctuation properties of acoustic phonons created in a semiconductor quantum dot after ultrafast optical excitation. An excitation with a single ultrafast pulse creates an exciton confined to the quantum dot,…

Mesoscale and Nanoscale Physics · Physics 2015-06-12 D. Wigger , D. E. Reiter , V. M. Axt , T. Kuhn

A quantum emitter interacting with photons in a single optical-mode constitutes a one-dimensional atom. A coherent and efficiently coupled one-dimensional atom provides a large nonlinearity, enabling photonic quantum gates. Achieving a high…

The optical emission spectrum of a quantum dot in strong coupling with the single mode of a microcavity is obtained in the nonlinear regime. We study how exciton-exciton interactions alter the emission spectrum of the system, bringing the…

Mesoscale and Nanoscale Physics · Physics 2009-07-09 E. del Valle , F. P. Laussy , F. M. Souza , I. A. Shelykh

We investigate the possibility of achieving the strong coupling regime of cavity quantum electrodynamics using rare earth ions as impurities in monolithic optical resonators. We conclude that due to the weak oscillator strengths of the rare…

Quantum Physics · Physics 2015-05-13 D. L. McAuslan , J. J. Longdell , M. J. Sellars

We propose a realizable architecture using one-dimensional transmission line resonators to reach the strong coupling limit of cavity quantum electrodynamics in superconducting electrical circuits. The vacuum Rabi frequency for the coupling…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 S. M. Girvin , Ren-Shou Huang , Alexandre Blais , Andreas Wallraff , R. J. Schoelkopf

Single-photon emitters integrated into quantum optical circuits will enable new, miniaturized quantum optical devices. Here, we numerically investigate semiconductor quantum dots embedded to low refractive index contrast waveguides. We…

The coherent emission of multiple atoms gives rise to superradiance, a cornerstone phenomenon in quantum optics with wide-ranging applications in quantum information processing and precision metrology. Despite its importance, how the…

Quantum Physics · Physics 2025-10-15 Ruijin Sun , Xiang Guo , Andreas Ruschhaupt , Zhihai Wang

Photon emission and absorption by an individual qubit are essential elements for the quantum manipulation of light. Here we demonstrate the controllability of spontaneous emission of a qubit in various electromagnetic environments. The…

Quantum Physics · Physics 2019-07-10 Wai-Keong Mok , Jia-Bin You , Wenzu Zhang , Wan-Li Yang , Ching Eng Png

We present a theory of resonance fluorescence (RF) of a solid-state quantum emitter in the regime of weak optical excitation. The emitter is coupled to phonon modes of the surrounding bulk semiconductor, described by a super-Ohmic spectral…

Mesoscale and Nanoscale Physics · Physics 2025-12-23 Rafal Bogaczewicz , Pawel Machnikowski