Results 241 to 250 of about 39,774 (284)

Quantum ground-state cooling of two librational modes of a nanorotor. [PDF]

Nat Phys
Troyer S, Fechtel F, Hummer L, Rudolph H, Stickler BA, Delić U, Arndt M.   +6 more
europepmc   +1 more source

Energy-speed relationship of quantum particles challenges Bohmian mechanics. [PDF]

Nature
Sharoglazova V, Puplauskis M, Mattschas C, Toebes C, Klaers J.   +4 more
europepmc   +1 more source

<i>Ab initio</i> electronic structure calculations of lanthanide single-molecule magnets; a practical guide.

Chem Soc Rev
Chilton NF.
europepmc   +1 more source

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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, dissipation, and fluctuations

Physical Review Letters, 1986
A theory of quantum tunneling with dissipation is constructed. The frequency-dependent transmission coefficient is calculated at zero and finite temperatures. A fluctuation-dissipation theorem for tunneling particles is derived.
, Bruinsma, , Bak
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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
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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
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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
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