Results 121 to 130 of about 746,739 (376)

Gauge equivalence in QCD: the Weyl and Coulomb gauges

, 2003
The Weyl-gauge ($A_0^a=0)$ QCD Hamiltonian is unitarily transformed to a representation in which it is expressed entirely in terms of gauge-invariant quark and gluon fields.
A. Cucchieri, D. Zwanziger, E. Fermi, G.C. Rossi, G.C. Rossi, G.C. Rossi, Hai-cang Ren, I.M. Singer, J. Goldstone, J. Schwinger, J. Schwinger, J. Schwinger, J.L. Gervais, K. Bleuler, K. Cahill, K. Gawedzki, K. Haller, K. Haller, K. Haller, K. Haller, K. Haller, K. Haller, Kurt Haller, L. Chen, L. Faddeev, M. Belloni, M. Belloni, M. Creutz, M. Lavelle, N.H. Christ, P.A.M. Dirac, P.G. Bergmann, R. Jackiw, R. Jackiw, R.E. Cutkosky, R.E. Cutkosky, R.E. Cutkosky, S.N. Gupta, V.N. Gribov   +38 more
core   +1 more source

On the integrability of Tonelli Hamiltonians [PDF]

Transactions of the American Mathematical Society, 2011
In this article we discuss a weaker version of Liouville’s Theorem on the integrability of Hamiltonian systems. We show that in the case of Tonelli Hamiltonians the involution hypothesis on the integrals of motion can be completely dropped and still interesting information on the dynamics of the system can be deduced. Moreover, we prove that on the
Alfonso Sorrentino, Alfonso Sorrentino
openaire   +6 more sources

Enhanced Polariton Interactions in Suspended WS2 Monolayer Microcavity

Advanced Materials, EarlyView.
Monolayers of transition‐metal dichalcogenides exhibit strong exciton resonances for light‐matter interactions at RT, though substrate effects limit performance. This work presents a planar microcavity with a suspended WS2 monolayer, eliminating substrate‐induced losses.
Laura Polimeno, Francesco Todisco, Rosanna Mastria, Milena De Giorgi, Antonio Fieramosca, Marco Pugliese, Dario Ballarini, Anna Grudinina, Nina Voronova, Daniele Sanvitto   +9 more
wiley   +1 more source

A note on the KP hierarchy

, 1992
Given the two boson representation of the conformal algebra \hat W_\infty, the second Hamiltonian structure of the KP hierarchy, I construct a bi-Hamiltonian hierarchy for the two associated currents.
Depireux, Didier A
core   +1 more source

Hamiltonian square roots of skew-Hamiltonian matrices

Linear Algebra and its Applications, 1999
AbstractWe present a constructive existence proof that every real skew-Hamiltonian matrix W has a real Hamiltonian square root. The key step in this construction shows how one may bring any such W into a real quasi-Jordan canonical form via symplectic similarity. We show further that every W has infinitely many real Hamiltonian square roots, and give a
D. Steven Mackey, Heike Faβbender, Niloufer Mackey, Hongguo Xu   +3 more
openaire   +2 more sources

Superior Adhesion of Monolayer Amorphous Carbon to Copper

Advanced Materials, EarlyView.
The adhesion energy of monolayer amorphous carbon on copper substrate is 85 J m−2, 13 times higher than that of graphene due to covalent‐like bonding between the sp2 carbon structure to copper. X‐ray photoelectron spectroscopy (XPS), near‐edge X‐ray absorption (NEXAFS), and (density functional theory) DFT calculations are used to elucidate the ...
Hongji Zhang, Artem K. Grebenko, Konstantin V. Iakoubovskii, Hanning Zhang, Ruslan Yamaletdinov, Anna Makarova, Alexander Fedorov, Rejaul SK, Ranjith Shivajirao, Zheng Jue Tong, Sergey Grebenchuk, Ugur Karadeniz, Lu Shi, Denis V. Vyalikh, Ya He, Andrei Starkov, Alena A. Alekseeva, Chuan Chu Tee, Carlo Mendoza Orofeo, Junhao Lin, Kazutomo Suenaga, Michel Bosman, Maciej Koperski, Bent Weber, Kostya S. Novoselov, Oleg V. Yazyev, Chee‐Tat Toh, Barbaros Özyilmaz   +27 more
wiley   +1 more source

Conservation laws of semidiscrete canonical Hamiltonian equations

, 2004
There are many evolution partial differential equations which can be cast into Hamiltonian form. Conservation laws of these equations are related to one-parameter Hamiltonian symmetries admitted by the PDEs.
Aiyer R N, Aksenov A V, Ames W F, Bridges Th J, Bridges Th J, Bruschi M, Chaudhuri K R, Dorodnitsyn V A, Dorodnitsyn V A, Dorodnitsyn V A, Floreanini R, Ibragimov N H, Levi D, Marsden J E, Narita K, Nijhoff F W, Olver P J, Roman Kozlov, Sanz-Serna J M, Zaharov V E   +19 more
core   +1 more source

CHOMP: Covariant Hamiltonian optimization for motion planning

Int. J. Robotics Res., 2013
In this paper, we present CHOMP (covariant Hamiltonian optimization for motion planning), a method for trajectory optimization invariant to reparametrization.
Matthew Zucker, Nathan Ratliff Google, Anca D. Dragan, M. Pivtoraiko, Matthew Klingensmith, Nathan D. Ratliff, Christopher M. Dellin, J. Bagnell, S. Srinivasa, A. Dragan, S. Srinivasa, Pittsburgh Pa, Philadelphia Pa   +12 more
semanticscholar   +1 more source

Anomalous Phonon Softening with Inherent Strain in Wrinkled Monolayer WSe2

Advanced Materials, EarlyView.
This study introduces the first discovery of a new local strain indicator, A2′′(Γ)$A_2^{^{\prime\prime}}( \Gamma )$ mode, for monolayer WSe2‐based excitonic applications including single photon emitter by using tip‐enhanced Raman spectroscopy. The correlative investigation with density functional perturbation theory provides the origin of the anomalous
Dong Hyeon Kim, Jaekak Yoo, Hyeong Chan Suh, Yo Seob Won, Sung Hyuk Kim, Dong‐Joon Yi, Byeong Geun Jeong, Chanwoo Lee, Dongki Lee, Ki Kang Kim, Seung Mi Lee, Eui Kwan Koh, Mun Seok Jeong   +12 more
wiley   +1 more source

Poisson integrators

, 2004
An overview of Hamiltonian systems with noncanonical Poisson structures is given. Examples of bi-Hamiltonian ode's, pde's and lattice equations are presented. Numerical integrators using generating functions, Hamiltonian splitting, symplectic Runge-Kutta
Karasözen, B.
core   +1 more source