Results 81 to 90 of about 304,578 (296)

SYM Description of SFT Hamiltonian in a PP-Wave Background [PDF]

open access: yes, 2002
We compute string field theory Hamiltonian matrix elements and compare them with matrix elements of the dilatation operator in gauge theory. We get precise agreement between the string field theory and gauge theory computations once the correct cubic ...
Beisert   +33 more
core   +2 more sources

Artificial Intelligence‐Assisted Workflow for Transmission Electron Microscopy: From Data Analysis Automation to Materials Knowledge Unveiling

open access: yesAdvanced Materials, EarlyView.
AI‐Assisted Workflow for (Scanning) Transmission Electron Microscopy: From Data Analysis Automation to Materials Knowledge Unveiling. Abstract (Scanning) transmission electron microscopy ((S)TEM) has significantly advanced materials science but faces challenges in correlating precise atomic structure information with the functional properties of ...
Marc Botifoll   +19 more
wiley   +1 more source

Quantum Approach to Damped Three Coupled Nano-Optomechanical Oscillators

open access: yesComplexity, 2021
We investigate quantum features of three coupled dissipative nano-optomechanical oscillators. The Hamiltonian of the system is somewhat complicated due not only to the coupling of the optomechanical oscillators but to the dissipation in the system as ...
Jeong Ryeol Choi, Salah Menouar
doaj   +1 more source

Long-Range GL(n) Integrable Spin Chains and Plane-Wave Matrix Theory

open access: yes, 2005
Quantum spin chains arise naturally from perturbative large-N field theories and matrix models. The Hamiltonian of such a model is a long-range deformation of nearest-neighbor type interactions.
Beisert, N., Klose, T.
core   +1 more source

Discreteness of the spectrum of the compactified D=11 supermembrane with non-trivial winding [PDF]

open access: yes, 2002
We analyze the Hamiltonian of the compactified D=11 supermembrane with non-trivial central charge in terms of the matrix model constructed recently by some of the authors.
A. Restuccia   +20 more
core   +2 more sources

PT-symmetric, quasi-exactly solvable matrix Hamiltonians [PDF]

open access: yesJournal of Physics A: Mathematical and Theoretical, 2007
14 pages, 1 figure, one equation corrected, results ...
Brihaye, Y.   +2 more
openaire   +2 more sources

Microscopic Insights into Magnetic Warping and Time‐Reversal Symmetry Breaking in Topological Surface States of Rare‐Earth‐Doped Bi2Te3

open access: yesAdvanced Materials, EarlyView.
Magnetic doping of the topological insulator Bi2Te3 with erbium adatoms induces out‐of‐plane magnetism and breaks time‐reversal symmetry, opening a Dirac gap and driving a Fermi surface transition from hexagonal to star‐of‐David geometry. Microscopy, spectroscopy, and magnetic dichroism reveal atomically controlled magnetic interactions that tailor the
Beatriz Muñiz Cano   +18 more
wiley   +1 more source

HQET sum rules for matrix elements of dimension-six four-quark operators for meson lifetimes within and beyond the Standard Model

open access: yesJournal of High Energy Physics
Theory predictions of heavy-hadron lifetime ratios critically depend on precise determinations of the dimension-six spectator effects arising from the double insertion of the weak effective |∆B| = 1 Hamiltonian.
Matthew Black   +3 more
doaj   +1 more source

Out-of-equilibrium dynamics with matrix product states

open access: yesNew Journal of Physics, 2012
Theoretical understanding of strongly correlated systems in one spatial dimension has been greatly advanced by the density-matrix renormalization group (DMRG) algorithm, which is a variational approach using a class of entanglement-restricted states ...
M L Wall, Lincoln D Carr
doaj   +1 more source

Spin and the Thermal Equilibrium Distribution of Wave Functions [PDF]

open access: yes, 2013
Consider a quantum system $S$ weakly interacting with a very large but finite system $B$ called the heat bath, and suppose that the composite $S\cup B$ is in a pure state $\Psi$ with participating energies between $E$ and $E+\delta$ with small $\delta ...
Pandya, Viraj, Tumulka, Roderich
core   +1 more source

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