Results 31 to 40 of about 4,014,515 (278)

A framework for measuring weak values without weak interactions and its diagrammatic representation

open access: yesNew Journal of Physics, 2019
Weak values are typically obtained experimentally by performing weak measurements, which involve weak interactions between the measured system and a probe.
Kazuhisa Ogawa   +4 more
doaj   +1 more source

Beyond QuantiFERON-TB Results, the Added Value of a Weak Mitogen Response

open access: yesFrontiers in Medicine, 2022
IntroductionWhile QuantiFERON-TB gold (QFT) is frequently used, little attention is paid to the mitogen response. How it could be impacted and associated with outcomes is poorly known.MethodsRetrospective, case-control study in hospitalized patients who ...
Marine Jacquier   +13 more
doaj   +1 more source

Sufficient conditions for uniqueness of the weak value [PDF]

open access: yes, 2011
We review and clarify the sufficient conditions for uniquely defining the generalized weak value as the weak limit of a conditioned average using the contextual values formalism introduced in Dressel J, Agarwal S and Jordan A N 2010 Phys. Rev. Lett. 104,
Dressel, J., Jordan, A. N.
core   +3 more sources

Introduction to Weak Measurements and Weak Values

open access: yesQuanta, 2013
We present a short review of the theory of weak measurement. This should serve as a map for the theory and an easy way to get familiar with the main results, problems and paradoxes raised by the theory. Quanta 2013; 2: 7–17.
Boaz Tamir, Eliahu Cohen
openaire   +3 more sources

When a negative weak value −1 plays the counterpart of a probability 1

open access: yesNew Journal of Physics, 2016
When the weak value of a projector is 1, a quantum system behaves as in that eigenstate with probability 1. By definition, however, the weak value may take an anomalous value lying outside the range of probability like −1.
Kazuhiro Yokota, Nobuyuki Imoto
doaj   +1 more source

Quantum averages of weak values [PDF]

open access: yesPhysical Review A, 2005
We re-examine the status of the weak value of a quantum mechanical observable as an objective physical concept, addressing its physical interpretation and general domain of applicability. We show that the weak value can be regarded as a \emph{definite} mechanical effect on a measuring probe specifically designed to minimize the back-reaction on the ...
Aharonov, Yakir, Botero, Alonso
openaire   +2 more sources

Feynman Paths and Weak Values [PDF]

open access: yesEntropy, 2018
There has been a recent revival of interest in the notion of a ‘trajectory’ of a quantum particle. In this paper, we detail the relationship between Dirac’s ideas, Feynman paths and the Bohm approach. The key to the relationship is the weak value of the momentum which Feynman calls a transition probability amplitude.
Robert Flack, Basil Hiley
openaire   +3 more sources

A weak-value model for virtual particles supplying the electric current in graphene: the minimal conductivity and the Schwinger mechanism

open access: yesNew Journal of Physics, 2014
We propose a model for the electric current in graphene in which electric carriers are supplied by virtual particles allowed by the uncertainty relations.
Kazuhiro Yokota, Nobuyuki Imoto
doaj   +1 more source

Generalized (ψ,α,β)—Weak Contractions for Initial Value Problems

open access: yesMathematics, 2019
A class of generalized ( ψ , α , β ) —weak contraction is introduced and some fixed-point theorems in a framework of partially ordered metric spaces are proved.
Piyachat Borisut   +3 more
doaj   +1 more source

Qubit state tomography in a superconducting circuit via weak measurements

open access: yesNew Journal of Physics, 2017
In this work we present a study on a new scheme for measuring the qubit state in a circuit quantum electrodynamics (QED) system, based on weak measurement and the concept of weak value. To be applicable under generic parameter conditions, our formulation
Lupei Qin   +3 more
doaj   +1 more source

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