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Time evolution of tunneling phenomena in medium is studied using a standard model of environment interaction. A semiclassical formula valid at low, but finite temperatures is derived in the form of integral transform for the reduced Wigner…

高能物理 - 唯象学 · 物理学 2007-05-23 Sh. Matsumoto , M. Yoshimura

We propose a new approach for computing tunneling rates in quantum or thermal field theory with multiple scalar fields. It is based on exact analytical solutions of piecewise linear potentials with many segments that describes any given…

高能物理 - 理论 · 物理学 2019-04-03 Victor Guada , Alessio Maiezza , Miha Nemevšek

We present a new theory which describes the collection of all tunnels of tunnel number 1 knots in the 3-sphere (up to orientation-preserving equivalence in the sense of Heegaard splittings) using the disk complex of the genus-2 handlebody…

几何拓扑 · 数学 2014-11-11 Sangbum Cho , Darryl McCullough

Superconducting qubits already demonstrated potential in emulating coherent back scattering or weak localization (WL) and tunnelling phenomena however, in a real multipath system they have not been verified yet.Here we show how a…

介观与纳米尺度物理 · 物理学 2020-09-02 Shaman Bhattacharyya , Somnath Bhattacharyya

To analyze the electronic band structure of a two-dimensional (2D) crystal under a commensurate perpendicular magnetic field, tight-binding (TB) Hamiltonians are typically constructed using a magnetic unit cell (MUC), which is composed of…

介观与纳米尺度物理 · 物理学 2024-10-17 Seungwon Jung

Chiral tunneling through a harmonically driven potential barrier in graphene monolayer is considered in this work. Since the quasiparticles in this system are chiral in nature, tunneling is highly anisotropic, we determine the transmission…

介观与纳米尺度物理 · 物理学 2008-08-23 M. Ahsan Zeb , K. Sabeeh , M. Tahir

Using a prototype model for proximity induced superconductivity on a bilayer square lattice, we show that interlayer tunneling can drive change in topology of the Bogoliubov quasiparticle bands. Starting with topologically trivial…

超导电性 · 物理学 2021-07-15 Navketan Batra , Swagatam Nayak , Sanjeev Kumar

Traditionally quantum tunneling in a static SQUID is studied on the basis of a classical trajectory in imaginary time under a two-dimensional potential barrier. The trajectory connects a potential well and an outer region crossing their…

超导电性 · 物理学 2015-05-18 B. Ivlev

It is possible to fabricate mesoscopic structures where at least one of the dimensions is of the order of de Broglie wavelength for cold electrons. By using semiconductors, composed of more than one material combined with a metal slip-gate,…

量子物理 · 物理学 2017-08-23 B. Nilsson

In this letter we present band gaps of II-VI semiconductors, calculated by the full potential linearized augmented plane wave (FP-LAPW) method with the modified Becke-Johnson (mBJ) potential. The accuracy of the calculated results is…

强关联电子 · 物理学 2012-01-05 Imad Khan , Iftikhar Ahmad , H. A. Rahnamaye Aliabad , M. Maqbool

Tunneling atomic force microscopy (TUNA) was used at ambient conditions to measure the current-voltage ($I$-$V$) characteristics at clean surfaces of highly oriented graphite samples with Bernal and rhombohedral stacking orders. The…

A simulation methodology for ultra-scaled InAs quantum well field effect transistors (QWFETs) is presented and used to provide design guidelines and a path to improve device performance. A multiscale modeling approach is adopted, where…

介观与纳米尺度物理 · 物理学 2011-10-28 Neerav Kharche , Gerhard Klimeck , Dae-Hyun Kim , Jesús. A. del Alamo , Mathieu Luisier

We investigate tunneling decay in a magnetic field. Because of broken time-reversal symmetry, the standard WKB technique does not apply. The decay rate and the outcoming wave packet are found from the analysis of the set of the particle…

介观与纳米尺度物理 · 物理学 2009-10-31 T. Barabash-Sharpee , M. I. Dykman , P. M. Platzman

GaSb/InAs heterojunction tunnel field-effect transistors are strong candidates in building future low-power integrated circuits, as they could provide both steep subthreshold swing and large ON-state current ($I_{\rm{ON}}$). However, at…

介观与纳米尺度物理 · 物理学 2016-12-01 Jun Z. Huang , Pengyu Long , Michael Povolotskyi , Gerhard Klimeck , Mark J. W. Rodwell

Communications using frequency bands in the millimeter-wave range can play a key role in future generations of mobile networks. By allowing large bandwidth allocations, high carrier frequencies will provide high data rates to support the…

网络与互联网体系结构 · 计算机科学 2017-05-08 Cristian Tatino , Ilaria Malanchini , Danish Aziz , Di Yuan

The tunneling probability for a system modelling macroscopic quantum tunneling is computed. We consider an open quantum system with one degree of freedom consisting of a particle trapped in a cubic potential interacting with an environment…

量子物理 · 物理学 2007-05-23 Esteban Calzetta , Enric Verdaguer

Quantum tunneling is a valuable resource exploited by quantum annealers to solve complex optimization problems. Tunneling events also occur during projective quantum Monte Carlo (PQMC) simulations, and in a class of problems characterized…

量子物理 · 物理学 2019-12-16 T. Parolini , E. M. Inack , G. Giudici , S. Pilati

We examine transmission through a quantum graph vertex to which auxiliary edges with constant potentials are attached. We find a characterization of vertex couplings for which the transmission probability from a given "input" line to a…

数学物理 · 物理学 2016-01-01 Ondřej Turek

Tunneling delay times of wavepackets in quantum mechanical penetration of rectangular barriers have long been known to show a perplexing independence with respect to the width of the barrier. This also has relevence to the transmission of…

量子物理 · 物理学 2015-06-26 Arya Paul , Arnab Saha , Swarnali Bandopadhyay , Binayak Dutta-Roy

The problem of tunneling control in systems "quantum dot - quantum well" (as well as "quantum dot - quantum dot" or quantum molecule) and "quantum dot - bulk contact" is studied as a quantum tunneling with dissipation process in the…