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We examine a classically-chaotic system consisting of two reservoirs of particles connected by a channel containing oscillating potential-energy barriers. We investigate whether such a system can preferentially pump particles from one…

Simultaneous strong coherent pumping of the two transitions of a V-level atom with very differentdecay rates has been predicted to create almost perfect inversion on the narrower transition. Usingthe example of the blue and red transitions…

量子物理 · 物理学 2021-02-03 Christoph Hotter , David Plankensteiner , Helmut Ritsch

The phonon-induced dephasing dynamics in optically excited semiconductor quantum dots is studied within the frameworks of the independent Boson model and optimal control. We show that appropriate tailoring of laser pulses allows a complete…

介观与纳米尺度物理 · 物理学 2009-11-10 Ulrich Hohenester , Georg Stadler

We report on the generation of nonclassical states of light in a silicon ring resonator in a selfpumping scheme. The ring is inserted in a lasing cavity, for which it acts as a filter, so that the lasing always occurs within a selected ring…

We study the impact of coherently generated lattice photons on an atomic Mott insulator subjected to a uniform force. Analogous to an array of tunnel-coupled and biased quantum dots, we observe sharp, interaction-shifted photon-assisted…

量子气体 · 物理学 2015-05-28 Ruichao Ma , M. Eric Tai , Philipp M. Preiss , Waseem S. Bakr , Jonathan Simon , Markus Greiner

The phenomenon that a quantum particle propagating in a detector, such as a Wilson cloud chamber, leaves a track close to a classical trajectory is analyzed. We introduce an idealized quantum-mechanical model of a charged particle that is…

数学物理 · 物理学 2021-03-17 Miguel Ballesteros , Tristan Benoist , Martin Fraas , Jürg Fröhlich

We analyze the frequency-dependent noise of a current through a quantum dot which is coupled to Fermi leads and which is in the Coulomb blockade regime. We show that the asymmetric shot noise as function of frequency shows steps and becomes…

介观与纳米尺度物理 · 物理学 2007-05-23 Hans-Andreas Engel , Daniel Loss

Acoustic modulation of quantum dots allows one to control the scattering of photons. Here we theoretically characterize the degree of this acoustic control in the frequency domain. We formulate the theory of low-intensity resonance…

介观与纳米尺度物理 · 物理学 2025-04-11 Rafał A. Bogaczewicz , Paweł Machnikowski

Here we demonstrate that photocurrent noise reduction below the standard quantum limit and modal anticorrelation can arise in two mode coupled two-VECSEL system with common pump. This effect occurs due to correlated loss of laser modes. It…

量子物理 · 物理学 2015-01-09 D. Mogilevtsev , D. B. Horoshko , Yu. M. Golubev , M. I. Kolobov

We report on non-adiabatic transport through a double quantum dot under irradiation of surface acoustic waves generated on-chip. At low excitation powers, absorption and emission of single and multiple phonons is observed. At higher power,…

介观与纳米尺度物理 · 物理学 2007-05-23 W. J. M. Naber , T. Fujisawa , H. W. Liu , W. G. van der Wiel

We demonstrate a new method for generating triggered single photons. After a laser pulse generates excitons inside of a single quantum dot, electrostatic interactions between them and the resulting spectral shifts allow a single emitted…

介观与纳米尺度物理 · 物理学 2009-10-31 Charles Santori , Matthew Pelton , Glenn Solomon , Yseulte Dale , Yoshihisa Yamamoto

Shot noise measurements provide information on particles' charge and their correlations. We report on shot noise measurements in a ubiquitous quantum dot under a quantized magnetic field. The measured noise at the peaks of a sequence of…

介观与纳米尺度物理 · 物理学 2009-11-11 O. Zarchin , Y. C. Chung , M. Heiblum , D. Rohrlich , V. Umansky

We propose a system for observing the correlated phase dynamics of two mesoscopic ensembles of atoms through their collective coupling to an optical cavity. We find a dynamical quantum phase transition induced by pump noise and cavity…

量子物理 · 物理学 2024-12-02 Minghui Xu , D. A. Tieri , E. C. Fine , James K. Thompson , M. J. Holland

A theory of pump-probe spectroscopy is developed in which optical fields drive two-quantum, Raman-like transitions between ground state sublevels. Three fields are incident on an ensemble of atoms. Two of the fields act as the pump field…

原子物理 · 物理学 2009-11-06 P. R. Berman , B. Dubetsky

We introduce a model description of a diatomic molecule in an optical cavity, with pump and fluorescent fields, and electron and nuclear motion are treated on equal footing and exactly. The model accounts for several optical response…

量子物理 · 物理学 2024-05-30 Megha Gopalakrishna , Emil Viñas Boström , Claudio Verdozzi

We derive general expressions for the current and shot noise, taking into account non-Markovian memory effects. In generalization of previous approaches our theory is valid for arbitrary Coulomb interaction and coupling strength and is…

介观与纳米尺度物理 · 物理学 2007-05-23 A. Thielmann , M. H. Hettler , J. König , G. Schön

Process of quantum tunneling of particles in various physical systems can be effectively controlled even by a weak and slow varying in time electromagnetic signal if to adapt specially its shape to a particular system. During an…

量子物理 · 物理学 2009-02-05 B. I. Ivlev

We entangle each individual matter-qubit in a register of ten to a separate travelling photon. The qubits are encoded in a string of cotrapped atomic ions. By switching the trap confinement, ions are brought one at a time into the waist of…

量子物理 · 物理学 2024-06-17 M. Canteri , Z. X. Koong , J. Bate , A. Winkler , V. Krutyanskiy , B. P. Lanyon

We consider theoretically the nonlinear quantized Thouless pumping of a Bose-Einstein condensate loaded in a two-dimensional dynamical optical lattices. We encountered three different scenarios of the pumping: quasi-linear one occurring for…

斑图形成与孤子 · 物理学 2022-10-26 Qidong Fu , Peng Wang , Yaroslav V. Kartashov , Vladimir V. Konotop , Fangwei Ye

We theoretically investigate the problem of localization control of few-photon states in driven-dissipative parity-symmetric photonic molecules. We show that a quantum feedback loop can utilize the information of the spontaneously-emitted…

量子物理 · 物理学 2018-07-04 C D B Bentley , A Celestino , A M Yacomotti , R El-Ganainy , A Eisfeld