中文
相关论文

相关论文: Finite-size effect in shot noise in hopping conduc…

200 篇论文

We analyze theoretically and experimentally the influence of current noise on the longitudinal mode hopping dynamics of a bulk semiconductor laser. It is shown that the mean residence times on each mode have different sensitivity to…

光学 · 物理学 2009-11-11 F. Pedaci , S. Lepri , S. Balle , G. Giacomelli , M. Giudici , J. R. Tredicce

We present a microscopic analysis of shot-noise suppression due to long-range Coulomb interaction in semiconductor devices under ballistic transport conditions. An ensemble Monte Carlo simulator self-consistently coupled with a Poisson…

介观与纳米尺度物理 · 物理学 2009-10-30 T. Gonzalez , O. M. Bulashenko , J. Mateos , D. Pardo , L. Reggiani

A mechanism of $1/f$ noise due to traps formed by impurities which have no neighbors with close energies in their vicinity is studied. Such traps slowly exchange electrons with the rest of conducting media. The concentration of traps and…

凝聚态物理 · 物理学 2009-11-07 B. I. Shklovskii

In a variety of mesoscopic systems shot noise is seen to be suppressed in comparison with its Poisson value. In this work we observe a considerable enhancement of shot noise in the case of resonant tunnelling via localised states. We…

介观与纳米尺度物理 · 物理学 2009-11-10 S. S. Safonov , A. K. Savchenko , D. A. Bagrets , O. N. Jouravlev , Y. V. Nazarov , E. H. Linfield , D. A. Ritchie

We have carried out numerical simulations of shot noise in 2D arrays of single-electron islands with random background charges. The results show that in contrast with the 1D arrays, at low currents the current noise is strongly colored, and…

介观与纳米尺度物理 · 物理学 2009-11-10 Daniel M. Kaplan , Victor A. Sverdlov , Konstantin K. Likharev

The thermodynamic properties of a non-interacting ideal Hadron Resonance Gas (HRG) of finite volume have been studied in the presence of an external magnetic field. The inclusion of background magnetic field in the calculation of…

高能物理 - 唯象学 · 物理学 2023-01-24 Debasis Atta , Nilanjan Chaudhuri , Snigdha Ghosh

Zero-noise extrapolation (ZNE) reduces noise-induced bias but can increase sampling variance through Richardson coefficients and shot splitting. We define a finite-shot help-harm boundary: the lower local mean-squared-error crossing where…

量子物理 · 物理学 2026-05-12 Vicenzo Scavino Alfaro

We present a new scheme to detect the quantum shot noise in coupled mesoscopic systems. By applying the noise thermometry to the capacitively coupled quantum point contacts (QPCs) we prove that the noise temperature of one QPC is in perfect…

介观与纳米尺度物理 · 物理学 2009-11-13 Masayuki Hashisaka , Yoshiaki Yamauchi , Shuji Nakamura , Shinya Kasai , Teruo Ono , Kensuke Kobayashi

We study the photon shot noise dephasing of a superconducting transmon qubit in the strong-dispersive limit, due to the coupling of the qubit to its readout cavity. As each random arrival or departure of a photon is expected to completely…

Spin-noise measurements can serve as direct probe for the microscopic decoherence mechanism of an electronic spin in semiconductor quantum dots (QD).We have calculated the spin-noise spectrum in the anisotropic central spin model using a…

介观与纳米尺度物理 · 物理学 2014-05-20 Johannes Hackmann , Frithjof B. Anders

We experimentally investigated the current noise in diffusive Superconductor/Normal metal/Superconductor junctions with lengths between the superconducting coherence length xi_Delta and the phase coherence length L_Phi of the normal metal…

介观与纳米尺度物理 · 物理学 2009-11-10 C. Hoffmann , F. Lefloch , M. Sanquer , B. Pannetier

We have investigated the noise properties of the tunneling current through vertically coupled self-assembled InAs quantum dots. We observe super-Poissonian shot noise at low temperatures. For increased temperature this effect is suppressed.…

介观与纳米尺度物理 · 物理学 2011-03-22 P. Barthold , F. Hohls , N. Maire , K. Pierz , R. J. Haug

We analyze shot noise in a magnetic tunnel junction with a two-level quantum dot attached to the magnetic electrodes. The considerations are limited to the case when some transport channels are suppressed at low temperatures. Coupling of…

介观与纳米尺度物理 · 物理学 2017-01-10 T. Szczepanski , V. K. Dugaev , J. Barnas , I. Martinez , J. P. Cascales , J. -Y. Hong , M. -T. Lin , F. G. Aliev

In the hot electron regime, electron-electron scattering strongly modifies not only the shot noise but also the full counting statistics. We employ a method based on a stochastic path integral to calculate the counting statistics of two…

介观与纳米尺度物理 · 物理学 2009-11-10 S. Pilgram

We report measurements and analysis of the voltage noise due the to vortex motion, performed in superconducting Niobium micro-bridges. Noise in such small systems exhibits important changes from the behavior commonly reported in macroscopic…

超导电性 · 物理学 2007-05-23 J. Scola , A. Pautrat , C. Goupil , Ch. Simon , B. Domenges , C. Villard

A sensor was developed to quantitatively measure perturbations which change the volume of a wave chaotic cavity while leaving its shape intact. The sensors work in the time domain by using either scattering fidelity of the transmitted…

We report measurements of shot noise in a tunnel junction under bi-harmonic illumination, Vac(t) = Vac1 cos(2\pi ft) + Vac2 cos(4\pi ft+ \phi). The experiment is performed in the quantum regime, hf >> k_BT at low temperature T = 70 mK and…

介观与纳米尺度物理 · 物理学 2013-02-21 Julien Gabelli , Bertrand Reulet

The recent paper (Science 382, 907 (2023)) is devoted to measurements of shot noise to probe excitations in nanowires of the heavy fermion (HF) metal $\rm YbRh_2Si_2$. The authors observed that shot noise is strongly suppressed, and claim…

强关联电子 · 物理学 2023-12-29 V. R. Shaginyan , A. Z. Msezane , G. S. Japaridze

The $\nu = 2/3$ filling is the simplest paradigmatic example of a fractional quantum Hall state, which contains counter-propagating edge modes. These modes can be either in the unequilibrated regime or equilibrated to different extents, on…

介观与纳米尺度物理 · 物理学 2024-12-25 Sourav Manna , Ankur Das , Yuval Gefen , Moshe Goldstein

Shot noise of series quantum point contacts forming a sequence of cavities in a two dimensional electron gas are studied theoretically and experimentally. Noise in such a structure originates from local scattering at the point contacts as…

介观与纳米尺度物理 · 物理学 2009-11-07 S. Oberholzer , E. V. Sukhorukov , C. Strunk , C. Schoenenberger