Results 51 to 60 of about 4,152 (114)

Comment on "Quantitative Condition is Necessary in Guaranteeing the Validity of the Adiabatic Approximation" [arXiv:1004.3100]

open access: yes, 2011
Recently, the authors of Ref.1[arXiv:1004.3100] claimed that they have proven the traditional adiabatic condition is a necessary condition. Here, it is claimed that there are some mistakes and an artificial over-strong constraint in [1], making its ...
D. Griffths, Jianda Wu, Meisheng Zhao
core   +1 more source

Rhetoric, logic, and experiment in the quantum nonlocality debate

open access: yesOpen Physics, 2017
This paper argues that quantum nonlocality (QNL) has not been rigorously proven, despite the existence of recent Einstein-Podolsky-Rosen-Bohm (EPRB) experiments that are claimed to be ‘loophole-free’.
Graft Donald A.
doaj   +1 more source

Near-Optimal Variance-Based Uncertainty Relations

open access: yesFrontiers in Physics, 2022
Learning physical properties of a quantum system is essential for the developments of quantum technologies. However, Heisenberg’s uncertainty principle constrains the potential knowledge one can simultaneously have about a system in quantum theory. Aside
Yunlong Xiao   +7 more
doaj   +1 more source

Measurement problem and local hidden variables with entangled photons

open access: yesOpen Physics, 2017
It is shown that there is no remote action with polarization measurements of photons in singlet state. A model is presented introducing a hidden parameter which determines the polarizer output.
Muchowski Eugen
doaj   +1 more source

Is Einsteinian no-signalling violated in Bell tests?

open access: yesOpen Physics, 2017
Relativistic invariance is a physical law verified in several domains of physics. The impossibility of faster than light influences is not questioned by quantum theory.
Kupczynski Marian
doaj   +1 more source

Realistic interpretation of a superposition state does not imply a mixture

open access: yes, 2003
Contrary to previous claims, it is shown that, for an ensemble of either single-particle systems or multi-particle systems, the realistic interpretation of a superposition state that mathematically describes the ensemble does not imply that the ensemble ...
A. Afriat   +14 more
core   +1 more source

Experimental quantum tomography of a homodyne detector

open access: yesNew Journal of Physics, 2017
We suggest and demonstrate a tomographic method to characterise homodyne detectors at the quantum level. The positive operator measure associated with the detector is expanded in a quadrature basis and probed with a set of coherent states.
Samuele Grandi   +3 more
doaj   +1 more source

Comment on "Quantum entropy and special relativity" [by A. Peres, P. F. Scudo, and D. R. Terno, Phys. Rev. Lett. 88, 230402 (2002)]

open access: yes, 2003
Two subtleties of this paper are discussed.Comment: version probably to appear in Phys.
M. Czachor, M. Czachor, Marek Czachor
core   +1 more source

Quantum supremacy of many-particle thermal machines

open access: yesNew Journal of Physics, 2016
While the emergent field of quantum thermodynamics has the potential to impact energy science, the performance of thermal machines is often classical.
J Jaramillo, M Beau, A del Campo
doaj   +1 more source

Three-party pure quantum states are determined by two two-party reduced states

open access: yes, 2004
We can uniquely calculate almost all entangled state vectors of tripartite systems ABC if we know the reduced states of any two bipartite subsystems, e.g., of AB and of BC.
Lajos Diósi, M.A. Nielsen
core   +1 more source

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