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pro vyhledávání: '"Kelleher, Colm"'
Autor:
Kelleher, Colm
Density matrices are the most general descriptions of quantum states, covering both pure and mixed states. Positive semidefiniteness is a physical requirement of density matrices, imposing nonnegative probabilities of measuring physical values. Separ
Externí odkaz:
http://arxiv.org/abs/2407.19061
We introduce and describe a new heuristic method for finding an upper bound on the degree of contextuality and the corresponding unsatisfied part of a quantum contextual configuration with three-element contexts (i.e., lines) located in a multi-qubit
Externí odkaz:
http://arxiv.org/abs/2407.02928
Quantum games embody non-intuitive consequences of quantum phenomena, such as entanglement and contextuality. The Mermin-Peres game is a simple example, demonstrating how two players can utilise shared quantum information to win a no - communication
Externí odkaz:
http://arxiv.org/abs/2403.09512
Autor:
Saniga, Metod, Holweck, Frédéric, Kelleher, Colm, Muller, Axel, Giorgetti, Alain, de Boutray, Henri
As it is well known, split Cayley hexagons of order two live in the three-qubit symplectic polar space in two non-isomorphic embeddings, called classical and skew. Although neither of the two embeddings yields observable-based contextual configuratio
Externí odkaz:
http://arxiv.org/abs/2312.07738
It is known that Mermin-Peres like proofs of quantum contextuality can furnish non-local games with a guaranteed quantum strategy, when classically no such guarantee can exist. This phenomenon, also called quantum pseudo-telepathy, has been studied i
Externí odkaz:
http://arxiv.org/abs/2310.07441
During eukaryotic cell division, a microtubule-based structure called the spindle exerts forces on chromosomes, thereby organizing and segregating them Extensive work demonstrates that the forces acting parallel to the spindle axis, including those r
Externí odkaz:
http://arxiv.org/abs/2211.00883
Publikováno v:
Results in Physics 22 (2021) 103859
It is found that $15$ different types of two-qubit $X$-states split naturally into two sets (of cardinality $9$ and $6$) once their entanglement properties are taken into account. We {characterize both the validity and entangled nature of the $X$-sta
Externí odkaz:
http://arxiv.org/abs/2008.03063
Autor:
Kelleher, Colm P.
For a broad class of two-dimensional (2D) materials, the transition from isotropic fluid to crystalline solid is described by the theory of melting due to Kosterlitz, Thouless, Halperin, Nelson and Young (KTHNY). According to this theory, long-range
Externí odkaz:
http://pqdtopen.proquest.com/#viewpdf?dispub=10195879
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The best-understood crystal ordering transition is that of two-dimensional freezing, which proceeds by the rapid eradication of lattice defects as the temperature is lowered below a critical threshold. But crystals that assemble on closed surfaces ar
Externí odkaz:
http://arxiv.org/abs/1802.04341