Results 21 to 30 of about 2,493 (230)

Curvature in Hermitian metric [PDF]

Bulletin of the American Mathematical Society, 1947
S. Bochner
openalex   +3 more sources

Observation of quantum metric and non-Hermitian Berry curvature in a plasmonic lattice

Physical Review Research
We experimentally observe the quantum geometric tensor, namely the quantum metric and the Berry curvature, for a square lattice of radiatively coupled plasmonic nanoparticles.
Javier Cuerda, Nicki Källman, Päivi Torma   +2 more
exaly   +3 more sources

Hodge modules and singular hermitian metrics

Mathematische Zeitschrift, 2022
v2: 17 pages, final version, to appear in Math ...
Schnell, Christian, Yang, Ruijie
openaire   +3 more sources

Deformation of Hermitian metrics

Mathematical Research Letters, 2022
In this work, we study the deformation of Hermitian metrics with Chern connection. By adapting the conformal perturbation method of Aubin and Ehrlich to Hermitian setting, we prove that Hermitian metrics with quasi-positive (resp. quasi-negative) second Chern-Ricci curvature can be deformed to one with positive (resp. negative) curvature.
Lee, Man-Chun, Li, Ka-Fai
openaire   +2 more sources

Quasi-Kahler Chern-flat manifolds and complex 2-step nilpotent Lie algebras [PDF]

, 2012
The study of quasi-Kaehler Chern-flat almost Hermitian manifolds is strictly related to the study of anti-bi-invariant almost complex Lie algebras.
Lauret, J., Di Scala, Antonio Jose', Vezzoni, L.   +2 more
core   +1 more source

Joint power control and user grouping mechanism for efficient uplink non‐orthogonal multiple access‐based 5G communication: Utilising the Lèvy‐flight firefly algorithm

IET Networks, EarlyView., 2023
We utilise a metaheuristic optimisation method, inspired by nature, called the Lévy‐flight firefly algorithm (LFA), to tackle the power regulation and user grouping in the NOMA systems. Abstract The non‐orthogonal multiple access strategies have shown promise to boost fifth generation and sixth generation wireless networks' spectral efficiency and ...
Zaid Albataineh, Khaled F. Hayajneh, Haythem Bany Salameh, Raed Al Athamneh, Yaser Jararweh   +4 more
wiley   +1 more source

Symplectic duality of Symmetric Spaces [PDF]

, 2008
We show that between symmetric spaces of different types there exists a bi-symplectic map.
Loi, Andrea, Di Scala, Antonio Jose', ANDREA LOI, DI SCALA A. J., Di Scala, Antonio J.   +4 more
core   +1 more source

Remarks on Chern–Einstein Hermitian metrics [PDF]

Mathematische Zeitschrift, 2019
minor changes, to appear in Math ...
daniele angella, simone calamai, cristiano spotti   +2 more
openaire   +5 more sources

Finding of the Metric Operator for a Quasi-Hermitian Model [PDF]

, 2013
We consider on an appropriate Sobolev space a non-Hermitian Hamiltonian depending on the two complex parameters α and β and having real spectrum. We derive a closed formula for a family of the metric operators, which render the Hamiltonian Hermitian ...
Ergun, Ebru, Ebru Ergun, Ebru Ergun
core   +1 more source

Operator (quasi-)similarity, quasi-hermitian operators and all that

, 2016
Motivated by the recent developments of pseudo-Hermitian quantum mechanics, we analyze the structure generated by unbounded metric operators in a Hilbert space.
Trapani, Camillo, International Conference on Non-Hermitian Hamiltonians in Quantum Physics, PHHQP 201, Antoine, Jean-Pierre   +2 more
core   +2 more sources