Results 81 to 90 of about 1,203,943 (289)

Breakdown of emergent Lifshitz symmetry in holographic matter with Harris-marginal disorder

open access: yesJournal of High Energy Physics, 2020
We revisit the theory of strongly correlated quantum matter perturbed by Harris-marginal random-field disorder, using the simplest holographic model. We argue that for weak disorder, the ground state of the theory is not Lifshitz invariant with a non ...
Koushik Ganesan, Andrew Lucas
doaj   +1 more source

The completeness of quantum theory for predicting measurement outcomes

open access: yes, 2013
The predictions that quantum theory makes about the outcomes of measurements are generally probabilistic. This has raised the question whether quantum theory can be considered complete, or whether there could exist alternative theories that provide ...
Chiribella, Giulio   +2 more
core   +4 more sources

Quantum Algorithms for Quantum Field Theories [PDF]

open access: yesScience, 2012
Quantum Leap? Quantum computers are expected to be able to solve some of the most difficult problems in mathematics and physics. It is not known, however, whether quantum field theories (QFTs) can be simulated efficiently with a quantum computer.
Jordan, Stephen P.   +2 more
openaire   +4 more sources

Electroactive Metal–Organic Frameworks for Electrocatalysis

open access: yesAdvanced Functional Materials, EarlyView.
Electrocatalysis is crucial in sustainable energy conversion as it enables efficient chemical transformations. The review discusses how metal–organic frameworks can revolutionize this field by offering tailorable structures and active site tunability, enabling efficient and selective electrocatalytic processes.
Irena Senkovska   +7 more
wiley   +1 more source

Quantum Covers in Quantum Measure Theory [PDF]

open access: yesFoundations of Physics, 2010
In standard measure theory the measure on the base set Omega is normalised to one, which encodes the statement that "Omega happens". Moreover, the rules imply that the measure of any subset A of Omega is strictly positive if and only if A cannot be covered by a collection of subsets of zero measure.
Surya, Sumati, Wallden, Petros
openaire   +4 more sources

On‐Surface Indigo‐Based Bimolecular Coordination Networks with Programmable Regular or Vitreous Structure

open access: yesAdvanced Functional Materials, EarlyView.
A previously unreported coordination motif stabilising single Fe atoms by indigo chelation and pyridyl coordination on Au(111) has been revealed. By using planar tritopic pyridyl linkers (TPyB), extended 2D porous networks of indigo3(TPyB)2Fe6 form. These networks can be crystalline or vitreous and offer an environment where individual coordination ...
Hongxiang Xu   +9 more
wiley   +1 more source

Quantum Lifshitz points in an altermagnetic superconductor

open access: yesAAPPS Bulletin
We predict the existence of two tri-critical quantum Lifshitz points in recently discovered d-wave altermagnetic metals subjected to an external magnetic field.
Hui Hu, Xia-Ji Liu
doaj   +1 more source

Note on entropy dynamics in the Brownian SYK model

open access: yesJournal of High Energy Physics, 2021
We study the time evolution of Rényi entropy in a system of two coupled Brownian SYK clusters evolving from an initial product state. The Rényi entropy of one cluster grows linearly and then saturates to the coarse grained entropy.
Shao-Kai Jian, Brian Swingle
doaj   +1 more source

Classical and quantum: a conflict of interest

open access: yes, 2017
We highlight three conflicts between quantum theory and classical general relativity, which make it implausible that a quantum theory of gravity can be arrived at by quantising classical gravity.
A Bassi   +63 more
core   +1 more source

Quaternionic Quantum Field Theory [PDF]

open access: yesPhysical Review Letters, 1985
Abstract Up to this point our discussion of relativistic quaternionic wave equations has dealt with the first quantized case, in which the wave fields are quaternions in the right-acting algebra spanned by 1, i,j,k, with c-number-valued real components.
openaire   +3 more sources

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