Results 21 to 30 of about 11,377,426 (260)

Clocks without “Time” in Entangled-State Experiments

open access: yesEntropy, 2020
Entangled states of light exhibit measurable correlations between light detections at separated locations. These correlations are exploited in entangled-state quantum key distribution.
F. Hadi Madjid, John M. Myers
doaj   +1 more source

Unconventional reconciliation path for quantum mechanics and general relativity

open access: yesIET Quantum Communication, 2022
Physics in general is successfully governed by quantum mechanics at the microscale and principles of relativity at the macroscale. Any attempts to unify them using conventional methods have somewhat remained elusive for nearly a century up to the present
Samuel Polopa Yuguru
doaj   +1 more source

Why Einstein did not believe that General Relativity geometrizes gravity [PDF]

open access: yes, 2013
I argue that, contrary to folklore, Einstein never really cared for geometrizing the gravitational or (subsequently) the electromagnetic field; indeed, he thought that the very statement that General Relativity geometrizes gravity "is not saying anything
Lehmkuhl, D, Lehmkuhl, Dennis
core   +1 more source

Why we need to quantise everything, including gravity

open access: yesnpj Quantum Information, 2017
Why we need to quantise everything, including gravity Quantum gravity—the theory that will merge quantum theory and general relativity—is yet to be found.
C. Marletto, V. Vedral
doaj   +1 more source

Constraints on Gravitation from Causality and Quantum Consistency

open access: yesAdvances in High Energy Physics, 2018
We examine the role of consistency with causality and quantum mechanics in determining the properties of gravitation. We begin by examining two different classes of interacting theories of massless spin 2 particles—gravitons.
Mark P. Hertzberg
doaj   +1 more source

No presentism in quantum gravity [PDF]

open access: yes, 2010
This essay offers a reaction to the recent resurgence of presentism in the philosophy of time. What is of particular interest in this renaissance is that a number of recent arguments supporting presentism are crafted in an untypically naturalistic vein ...
Christian Wüthrich, Wuthrich, Christian
core   +1 more source

Smaller is better: nanobodies meet NMR

open access: yesFEBS Letters, EarlyView.
Nanobodies are single‐domain antigen‐binding fragments derived from camelid heavy chain antibodies. Their small size, high stability, and exceptional specificity make nanobodies uniquely useful probes for NMR studies of protein dynamics, transient conformational states, and protein–protein interactions.
Oleg Y. Dmitriev
wiley   +1 more source

On the Inaccessibility of Time Machines

open access: yesUniverse, 2023
We will explain why time machines, although allowed in General Relativity, cannot be accessed by observers once we include quantum effects. Moreover, we will show that traversable wormholes cannot be turned into time machines without invoking the effects
Marija Tomašević
doaj   +1 more source

Heterotropic regulation and negative homotropic cooperativity

open access: yesFEBS Open Bio, EarlyView.
We identified a structural module common to some proteins that couple negative cooperativity with heterotropic regulation, two features that rarely coexist. These proteins are ring‐like and present an ordered asymmetry whereby noncontacting subunits are symmetric, and their tertiary structure differs from that of contacting subunits.
Veronica Morea   +5 more
wiley   +1 more source

Entanglement decoherence in a gravitational well according to the event formalism

open access: yesNew Journal of Physics, 2014
The event formalism is a nonlinear extension of quantum field theory designed to be compatible with the closed time-like curves that appear in general relativity.
T C Ralph, J Pienaar
doaj   +1 more source

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