Results 241 to 250 of about 1,987,784 (294)

Tunnelling of Quantum Spins

Europhysics Letters (EPL), 1986
A WKB formalism is presented to describe the quantum dynamics, including tunnelling, of a single spin with large spin quantum number. This is of particular relevance to the treatment of Hamiltonians with a large anisotropy. For a wide class of Hamiltonians we obtain the eigenstates and tunnelling rates and show the universal dependence of the latter ...
J.L. Van Hemmen, A. Sütö
openaire   +1 more source

Quantum tunneling observed without its characteristic large kinetic isotope effects

Proceedings of the National Academy of Sciences of the United States of America, 2015
Tetsuya Hama, Hirokazu Ueta, Akira Kouchi   +2 more
exaly   +2 more sources

Detecting and Characterizing the Nonadiabaticity of Laser-Induced Quantum Tunneling.

Physical Review Letters, 2019
The nonadiabaticity of quantum tunneling through an evolving barrier is relevant to resolving laser-driven dynamics of atoms and molecules at an attosecond timescale.
Kunlong Liu, Siqi Luo, Min Li, Yang Li, Yudi Feng, Baojie Du, Yueming Zhou, P. Lu, I. Barth   +8 more
semanticscholar   +1 more source

Quantum‐Tunneling Metal‐Insulator‐Metal Diodes Made by Rapid Atmospheric Pressure Chemical Vapor Deposition

Advanced Functional Materials, 2018
A quantum‐tunneling metal‐insulator‐metal (MIM) diode is fabricated by atmospheric pressure chemical vapor deposition (AP‐CVD) for the first time. This scalable method is used to produce MIM diodes with high‐quality, pinhole‐free Al2O3 films more rapidly
Abdullah H. Alshehri, Kissan Mistry, V. Nguyen, Khaled H. Ibrahim, D. Muñoz‐Rojas, M. Yavuz, K. Musselman   +6 more
semanticscholar   +1 more source

Quantum tunneling of massive spin-1 particles from non-stationary metrics [PDF]

General Relativity and Gravitation, 2015
We focus on the HR of massive vector (spin-1) particles tunneling from Schwarzschild BH expressed in the Kruskal–Szekeres and dynamic Lemaitre coordinates.
I Sakalli, Ali Övgün, Övgün A
exaly   +2 more sources

Quantum Mechanical Tunneling Is Essential to Understanding Chemical Reactivity

, 2020
Quantum mechanical tunneling is a consequence of the wave nature of particles that implies that a particle can penetrate a potential energy barrier even though there is insufficient energy to overcome it.
P. Schreiner
semanticscholar   +1 more source

Probing the Quantum Tunneling Limit of Plasmonic Enhancement by Third Harmonic Generation

Nano Letters, 2014
Ghazal Hajisalem, Reuven Gordon
exaly   +2 more sources

Quantum complexity associated with tunneling

Quantum Information and Computation, 2019
We use a one dimensional model of a square barrier embedded in an infinite potential well to demonstrate that tunneling leads to a complex behavior of the wave function and that the degree of complexity may be quantified by use of a locally defined spatial entropy function defined by S=-\int |\Psi(x,t)|^2 \ln |\Psi(x,t)|^2 dx .
Ofir Flom, Asher Yahalom, Haggai Zilberberg, Lawrence Paul Horwitz, Jacob Levitan   +4 more
openaire   +1 more source

Tunneling and Nonhyperbolicity in Quantum Dots

Physical Review Letters, 2002
We argue that many major features in electronic transport in realistic quantum dots are not explainable by the usual semiclassical approach, due to the contributions of the quantum-mechanical tunneling of the electrons through the Kolmogorov-Arnol'd-Moser islands.
Alessandro P S, De Moura, Ying-Cheng, Lai, Richard, Akis, Jonathan P, Bird, David K, Ferry   +4 more
openaire   +2 more sources

Photoinduced macroscopic quantum tunneling

Physical Review B, 1985
Recently there has been interest in macroscopic systems which can be described in terms of the quantum dynamics of the same collective variables which describe their classical behavior. In particular, there has been considerable interest in the following questions: (1) Is it possible to observe unambiguous evidence of the quantum-mechanical nature of a
, Chakravarty, , Kivelson
openaire   +2 more sources