Results 51 to 60 of about 428,741 (193)

Classical spinning branes in curved backgrounds [PDF]

Journal of High Energy Physics, 2007
The dynamics of a classical branelike object in a curved background is derived from the covariant stress-energy conservation of the brane matter. The world sheet equations and boundary conditions are obtained in the pole-dipole approximation, where nontrivial brane thickness gives rise to its intrinsic angular momentum.
Vasilić, Milovan, Vojinović, Marko
openaire   +3 more sources

Computer Simulation of Quantum Dynamics in a Classical Spin Environment

, 2014
In this paper a formalism for studying the dynamics of quantum systems coupled to classical spin environments is reviewed. The theory is based on generalized antisymmetric brackets and naturally predicts open-path off-diagonal geometric phases in the ...
Sergi, Alessandro
core   +1 more source

Quantum–classical correspondence in spin–boson equilibrium states at arbitrary coupling

New Journal of Physics
The equilibrium properties of nanoscale systems can deviate significantly from standard thermodynamics due to their coupling to an environment. We investigate this here for the θ -angled spin–boson model, where we first derive a compact and general form ...
F Cerisola, M Berritta, S Scali, S A R Horsley, J D Cresser, J Anders   +5 more
doaj   +1 more source

Emergence of classical behavior from the quantum spin

, 2012
Classical Hamiltonian system of a point moving on a sphere of fixed radius is shown to emerge from the constrained evolution of quantum spin. The constrained quantum evolution corresponds to an appropriate coarse-graining of the quantum states into ...
A. M. Perelomov, F. Haake, I. C. Percival, J. A. Wheeler, J. R. Klauder, M. Radonjić, M. Schlosshauer, N. Burić, N. P. Landsman, S. Prvanović, V. I. Arnold   +10 more
core   +1 more source

Spindensities in Pseudo-classical kinetic theory [PDF]

, 1995
In this paper the classical limit of relativistic transport theories for spin 1/2 fermions is examined through a comparison with the classical kinetic theory derived from N=1 supersymmetric classical mechanics.
Witte, F. M. C.
core   +2 more sources

Quasiclassical Hamiltonians for large-spin systems

, 2000
We propose a method for obtaining effective classical Hamiltonians \cal H for many-body quantum spin systems with large spins. This method uses the coherent-state representation of the partition function Z and the cumulant expansion in powers of 1/S. For
Fulde, P., Garanin, D. A., Kladko, K.
core   +1 more source

Full-magnetic implementation of a classical Toffoli gate

Physical Review Research
The Toffoli gate is the essential ingredient for reversible computing, an energy-efficient classical computational paradigm that evades the energy dissipation resulting from Landauer's principle.
Davide Nuzzi, Leonardo Banchi, Ruggero Vaia, Enrico Compagno, Alessandro Cuccoli, Paola Verrucchi, Sougato Bose   +6 more
doaj   +1 more source

Quasi-classical Limit of a Spin Coupled to a Reservoir [PDF]

Quantum
A spin (qubit) is in contact with a bosonic reservoir. The state of the reservoir contains a parameter $\varepsilon$ interpolating between quantum and classical reservoir features.
Michele Correggi, Marco Falconi, Michele Fantechi, Marco Merkli   +3 more
doaj   +1 more source

Searching for Kerr in the 2PM amplitude

Journal of High Energy Physics, 2022
The classical scattering of spinning objects is well described by the spinor-helicity formalism for heavy particles. Using these variables, we derive spurious-pole-free, all-spin opposite-helicity Compton amplitudes (factorizing on physical poles to the ...
Rafael Aoude, Kays Haddad, Andreas Helset   +2 more
doaj   +1 more source

Spin Three-Body Problem of Classical Electrodynamics with Radiation Terms (I) Derivation of Spin Equations

Results in Nonlinear Analysis, 2021
In the present paper spin equations for three-body problem of classical electrodynamics are introduced. They should be considered jointly with 3-body equations of motion derived in a previous paper of the author.
Vasil G. Angelov
doaj   +2 more sources