Results 41 to 50 of about 3,041,303 (142)

Operator growth in 2d CFT

Journal of High Energy Physics, 2021
We investigate and characterize the dynamics of operator growth in irrational two-dimensional conformal field theories. By employing the oscillator realization of the Virasoro algebra and CFT states, we systematically implement the Lanczos algorithm and ...
Pawel Caputa, Shouvik Datta
doaj   +1 more source

Three-loop evolution kernel for transversity operator

Journal of High Energy Physics
We calculate quantum corrections to the symmetry generators for the transversity operators in quantum chromodynamics (QCD) in the two-loop approximation.
A. N. Manashov, S. Moch, L. A. Shumilov
doaj   +1 more source

Exact dynamics of a two-level atom beyond the rotating wave approximation

EPJ Web of Conferences, 2017
Interaction Hamiltonians of some models beyond the rotating wave approximation are just a product of two commuting operators. The evolution operator of such models can be transformed into product of two independent chronological exponents with the help ...
Semin Vitalii
doaj   +1 more source

Constrained Multitask Differential Evolution Algorithm with Restructured Operator [PDF]

Jisuanji kexue yu tansuo
Knowledge transfer-based evolutionary multitask optimization has attracted much attention in the field of evolutionary computing. Most of the existing multitask evolutionary algorithms are concentrated on solving unconstrained multitask optimization ...
LI Xi, FENG Yanhong
doaj   +1 more source

Local Crossover: A New Genetic Operator for Grammatical Evolution

Algorithms
The presented work outlines a new genetic crossover operator, which can be used to solve problems by the Grammatical Evolution technique. This new operator intensively applies the one-point crossover procedure to randomly selected chromosomes with the ...
Ioannis G. Tsoulos, Vasileios Charilogis, Dimitrios Tsalikakis   +2 more
doaj   +1 more source

On the evolution of operator complexity beyond scrambling

Journal of High Energy Physics, 2019
We study operator complexity on various time scales with emphasis on those much larger than the scrambling period. We use, for systems with a large but finite number of degrees of freedom, the notion of K-complexity employed in [1] for infinite systems ...
J.L.F. Barbón, E. Rabinovici, R. Shir, R. Sinha   +3 more
doaj   +1 more source

Modifications in the SIFT operator for effective SAR image matching [PDF]

, 2010
With the increasing availability and rapidly improving spatial resolution of SAR images from latest and future satellites like TerraSAR-X and TanDEM-X, their applicability in remote sensing applications is set to be paramount.
Sahil Suri, Reinartz, Peter, Peter Schwind, Johannes Uhl, Schwind, Peter, Suri, Sahil, Peter Reinartz, Uhl, Johannes   +7 more
core   +1 more source

Efficient higher-order matrix product operators for time evolution

SciPost Physics
We introduce a systematic construction of higher-order matrix product operator (MPO) approximations of the time evolution operator for generic (short and long range) one-dimensional Hamiltonians. We demonstrate the utility of our construction, by showing
Maarten Van Damme, Jutho Haegeman, Ian McCulloch, Laurens Vanderstraeten
doaj   +1 more source

On the adjoint of a symmetric operator [PDF]

, 2007
In general it is a non-trivial task to determine the adjoint S* of an unbounded symmetric operator S in a Hilbert or Krein space. We propose a method to specify S* explicitly which makes use of two boundary mappings that satisfy an abstract Green's ...
Meda S., Nelly Villamizar, CATALISANO, MARIA VIRGINIA, E. CARLINI, Matilde Lalín, Saito, Morihiko, Mauceri G., Fernandes de Oliveira, GM, Yuzvinsky, Sergey, Nero Budur, Vallarino, Maria, PICCIONE, P., Matthias Langer, Behrndt, Jussi, Frank Sottile (7161257), Morihiko Saito, Hynek Kovařík, PEREIRA, Antonio L., M. V. CATALISANO, Budur, Nero, Langer, Matthias, Elisa Postinghel, Stefano Meda, Lotoreichik, Vladimir, JAVALOYES, M. A., Catalisano M.V, Carlini, Enrico, Mauceri, G., Giancarlo Mauceri, Sergey Yuzvinsky, CATALISANO M. V., PEREIRA, Marcone C., Jussi Behrndt, MAUCERI, GIANCARLO, Wadim Zudilin, Veys, Willem, S. Meda, Detchat Samart, M. Vallarino, Catalisano, M.V., G. Mauceri, Frank Sottile, Elisa Postinghel (2887796), BILIOTTI, L., Meda, S., Kovarik, Hynek, Maria Vallarino, Nelly Villamizar (7161260)   +47 more
core   +1 more source

Operator identities for standard weighted Bergman shift and Toeplitz operators [PDF]

, 2013
We prove an operator identity for the shift operator in the scale of standard weighted Bergman spaces in the unit disc. This operator identity is then applied in the context of functional calculus for the shift operator and a characterization of harmonic
Olofsson, Anders, Wennman, Aron,, Wennman, Aron, Olofsson, A.   +3 more
core   +1 more source