Results 11 to 20 of about 2,789,144 (299)

Fair colorful k-center clustering [PDF]

open access: yesMathematical Programming, 2020
AbstractAn instance of colorfulk-center consists of points in a metric space that are colored red or blue, along with an integer k and a coverage requirement for each color. The goal is to find the smallest radius $$\rho $$ ρ such that there exist balls of radius $$\rho $$ ρ around k
Jia, Xinrui   +2 more
openaire   +5 more sources

Improved Bounds for Centered Colorings [PDF]

open access: yesAdvances in Combinatorics, 2020
A vertex coloring $\phi$ of a graph $G$ is $p$-centered if for every connected subgraph $H$ of $G$ either $\phi$ uses more than $p$ colors on $H$ or there is a color that appears exactly once on $H$. Centered colorings form one of the families of parameters that allow to capture notions of sparsity of graphs: A class of graphs has bounded expansion if ...
Michał Dębski   +3 more
openaire   +9 more sources

Tunable Cr4+ Molecular Color Centers [PDF]

open access: yesJournal of the American Chemical Society, 2021
The inherent atomistic precision of synthetic chemistry enables bottom-up structural control over quantum bits, or qubits, for quantum technologies. Tuning paramagnetic molecular qubits that feature optical-spin initialization and readout is a crucial step toward designing bespoke qubits for applications in quantum sensing, networking, and computing ...
Daniel W. Laorenza   +11 more
openaire   +2 more sources

Silicon-Vacancy Centers in Ultra-Thin Nanocrystalline Diamond Films

open access: yesMicromachines, 2018
Color centers in diamond have shown excellent potential for applications in quantum information processing, photonics, and biology. Here we report the optoelectronic investigation of shallow silicon vacancy (SiV) color centers in ultra-thin (7–40 ...
Stepan Stehlik   +7 more
doaj   +1 more source

Discovery of ST1 centers in natural diamond

open access: yesNanophotonics, 2019
The ST1 center is a point defect in diamond with bright fluorescence and a mechanism for optical spin initialization and readout. The center has impressive potential for applications in diamond quantum computing as a quantum bus to a register of nuclear ...
Balasubramanian Priyadharshini   +6 more
doaj   +1 more source

Tailoring optical emission of silicon-vacancy centers in two-dimensional diamond nanosheets via a two-step oxidation approach

open access: yesFunctional Diamond, 2023
Incorporating two-dimensional (2D) diamond nanosheets with fluorescent color centers exhibits great potential in the application of quantum sensing.
Bing Yang   +8 more
doaj   +1 more source

Center vortices atN > 4 colors [PDF]

open access: yesNuclear Physics B - Proceedings Supplements, 2003
3 pages, Lattice2002(topology)
Greensite, Jeff, Olejník, Štefan
openaire   +3 more sources

Vortices in the SU(2)-Higgs model -- Vortices and the covariant adjoint Laplacian [PDF]

open access: yes, 2001
Vortices in the SU(2)--Higgs model: The presence of a fundamental Higgs in the SU(N)-Higgs model yields color screening at some finite distance. Whereas the transition to the Higgs "phase" is accompanied by a suppression of projected center vortices ...
Albert Hirtl   +5 more
core   +2 more sources

Experimental Analysis of Fiber Laminating Effects on Flexural Rigidity of Composite Endplates for Use in PEM Fuel Cells [PDF]

open access: yesHydrogen, Fuel Cell & Energy Storage, 2022
One of the most important components of a polymer electrolyte membrane fuel cell is the endplate, which must exert uniform contact pressure distribution on the membrane electrode assembly.
Mohammad Barzegari, Iman Sahebi Joibari
doaj   +1 more source

The Center symmetry and its spontaneous breakdown at high temperatures [PDF]

open access: yes, 2000
We examine the role of the center Z(N) of the gauge group SU(N) in gauge theories. In this pedagogical article, we discuss, among other topics, the center symmetry and confinement and deconfinement in gauge theories and associated finite-temperature ...
Holland, K., Wiese, U. -J.
core   +2 more sources

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