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Many molecular junctions display stochastic telegraphic switching between two distinct current values, which is therefore an important source of fluctuations in nanoscale quantum transport. We investigate electronic fluctuations arising via…

介观与纳米尺度物理 · 物理学 2019-12-25 Samuel L. Rudge , Daniel S. Kosov

Noise-assisted transport phenomena highlight the nontrivial interplay between environmental effects and quantum coherence in achieving maximal efficiency. Due to the complexity of biochemical systems and their environments, effective open…

We analyze the effects of various forms of noise on one-dimensional systems of non-interacting fermions. In the strong noise limit, we demonstrate, under mild assumptions, that the statistics of the fermionic correlation matrix in the…

统计力学 · 物理学 2025-07-18 João Costa , Pedro Ribeiro , Andrea De Luca

Studying charge transport in models with nonlocal carrier--phonon interaction is difficult because it requires finite-temperature real-time correlation functions of mixed carrier--phonon operators. Focusing on models with discrete undamped…

强关联电子 · 物理学 2025-07-08 Veljko Janković

We study fluctuations of electric current in a quantum resistor and derive a general quantum-mechanical formula for the distribution of transmitted charge. For that we introduce a scheme of current measurement that involves a spin $1/2$…

凝聚态物理 · 物理学 2007-05-23 L. S. Levitov , G. B. Lesovik

We investigate the full counting statistics of a single quantum dot strongly coupled to a local phonon and weakly tunnel-connected to two metallic electrodes. By employing the generalized nonequilibrium Green function method and the…

介观与纳米尺度物理 · 物理学 2015-06-16 Bing Dong , G. H. Ding , X. L. Lei

Scanning tunneling microscope induced light emission from an atomic or molecular junction has been probed from the tunneling to contact regime in recent experiments. There, the intensity of the light emission shows strong correlation with…

介观与纳米尺度物理 · 物理学 2013-07-11 Jing-Tao Lü , Rasmus Bjerregaard Christensen , Mads Brandbyge

State of the art quantum transport models for semiconductor nanodevices attribute negative (positive) unit charges to states of the conduction (valence) band. Hybrid states that enable band-to-band tunneling are subject to interpolation…

应用物理 · 物理学 2018-08-01 Yuanchen Chu , Prasad Sarangapani , James Charles , Gerhard Klimeck , Tillmann Kubis

We present time-resolved measurements of electron transport through a quantum dot. The measurements were performed using a nearby quantum point contact as a charge detector. The rates for tunneling through the two barriers connecting the…

介观与纳米尺度物理 · 物理学 2009-11-11 S. Gustavsson , R. Leturcq , B. Simovic , R. Schleser , P. Studerus , T. Ihn , K. Ensslin , D. C. Driscoll , A. C. Gossard

Recent experimental progress has made it possible to detect in real-time single electrons tunneling through Coulomb blockade nanostructures, thereby allowing for precise measurements of the statistical distribution of the number of…

介观与纳米尺度物理 · 物理学 2010-10-07 Christian Flindt , Tomas Novotny , Alessandro Braggio , Antti-Pekka Jauho

The transport of fermions through nanocircuits plays a major role in mesoscopic physics. Exploring the analogy with classical wave scattering, basic notions of nanoscale transport can be explained in a simple way, even at the level of…

介观与纳米尺度物理 · 物理学 2014-03-06 B. A. Z. Antonio , A. A. Lopes , R. G. Dias

We describe how to treat the interaction of travelling electrons with localised vibrational modes in nanojunctions. We present a multichannel scattering technique which can be applied to calculate the transport properties for realistic…

介观与纳米尺度物理 · 物理学 2007-05-23 H. Ness , A. J. Fisher

The effect of electron-phonon interactions in the conductance through metallic atomic wires is theoretically analyzed. The proposed model allows to consider an atomic size region electrically and mechanically coupled to bulk electrodes. We…

介观与纳米尺度物理 · 物理学 2009-11-11 L. de la Vega , A. Martin-Rodero , N. Agrait , A. Levy Yeyati

It is shown, with citing tunnel junction as an example, that mutual interplay of electron quantum transfers in a conducting system can be the fast mechanism for generation fundamental low-frequency flicker conductance fluctuations (1/f…

统计力学 · 物理学 2007-05-23 Yu. E. Kuzovlev , Yu. V. Medvedev , A. M. Grishin

We present an application of a new formalism to treat the quantum transport properties of fully interacting nanoscale junctions. We consider a model single-molecule nanojunction in the presence of two kinds of electron-vibron interactions.…

介观与纳米尺度物理 · 物理学 2013-04-08 H. Ness , L. K. Dash

Charge transport through a nanoscale junction coupled to two macroscopic electrodes is investigated for the situation when bound states are present. We provide numerical evidence that bound states give rise to persistent, non-decaying…

介观与纳米尺度物理 · 物理学 2009-11-13 E. Khosravi , S. Kurth , G. Stefanucci , E. K. U. Gross

We study the principal aspects of the interaction between acoustic phonons and two-dimensional electrons in quantizing magnetic fields corresponding to even denominator fractions. Using the composite fermion approach we derive the vertex of…

介观与纳米尺度物理 · 物理学 2016-08-31 D. V. Khveshchenko , M. Reizer

We report on a quantum form of electronic flicker noise in nanoscale conductors that contains valuable information on quantum transport. This noise is experimentally identified in atomic and molecular junctions, and theoretically analyzed…

介观与纳米尺度物理 · 物理学 2022-06-22 Ofir Shein-Lumbroso , Junjie Liu , Abhay Shastry , Dvira Segal , Oren Tal

Full counting statistics is a fundamentally new concept in quantum transport. After a review of basic statistics theory, we introduce the powerful Green's function approach to full counting statistics. To illustrate the concept we consider…

介观与纳米尺度物理 · 物理学 2018-05-09 W. Belzig

Using a simple quantum master equation approach, we calculate the Full Counting Statistics of a single electron transistor strongly coupled to vibrations. The Full Counting Statistics contains both the statistics of integrated particle and…

统计力学 · 物理学 2013-03-25 Gernot Schaller , Thilo Krause , Tobias Brandes , Massimiliano Esposito