Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

arXiv:1301.6154 · Physical Review A

Peculiar features of entangled states with postselection

Yakir Aharonov, SHMUEL NUSSINOV, Sandu Popescu, Lev Vaidman A

Published Jan 28, 2013• 13 citations
arXivHTMLPDF

Abstract

We consider quantum systems in entangled states post-selected in non-entangled states. Such systems exhibit unusual behavior, in particular when weak measurements are performed at intermediate times.
DOI
10.1103/physreva.87.014105

Related papers

The problem of entanglement of quantum states

G. A. Raggio

We give a brief and incomplete survey of the problem of entanglement of states of composite quantum systems.

Revista de la Unión Matemática Argentina•Dec 1, 2008•0 citations

Classicality from quantumness revealed by disturbance-free measurement

Sang Min Lee, Min-Su Kim, Heonoh Kim +2 more

We propose an asymptotic disturbance-free measurement using the so-called weak-value scheme,where the weakly measured quantum system is measured for a second time, to confirm that it is disturbance-free; moreover, the probability of obtaining the non-disturbed state must approach one. We show that the weak-measurement outcomes of the Bell state post-selected in this manner exhibit classical behavior in the sense that they satisfy the Clauser-Horne-Shimony-Holt inequality. However, the inequality is violated if all outcomes without post-selection are considered. We experimentally confirm our idea by performing joint weak measurement of polarization-entangled photon-pairs and subsequent fiber-based Bell-state measurement.

•Oct 11, 2017•0 citations

Can quantum entangled states collapse spontaneously?

Nicolas Gisin

Physics Letters A•May 1, 1991•3 citations

Unusual Interaction of a Pre-and-Post-Selected Particle

Yakir Aharonov, Eliahu Cohen, Shay Ben-Moshe

Weak value is increasingly acknowledged as an important research tool for probing quantum pre- and post-selected ensembles, where some extraordinary phenomena occur. We generalize this concept to the broader notion of "weak potential" which enables predicting the interactions between particles when one of them is pre-/post-selected and the interaction potential is small. A harmonic oscillator is considered, undergoing weak position and momentum measurements between strong position measurement, and shown to possess peculiar physical properties, affecting the momentum rather than the position of another oscillator interacting with it.

arXiv:1208.3203•Aug 15, 2012•3 citations

Unusual Interactions of Pre-and-Post-Selected Particles

Yakir Aharonov, Eliahu Cohen, Shay Ben-Moshe

Weak value is increasingly acknowledged as an important research tool for probing quantum pre- and post-selected ensembles, where some extraordinary phenomena occur. We generalize this concept into the broader notion of “weak potential” which enables predicting the interactions between particles when one of them is pre-/post-selected and the interaction potential is small. A harmonic oscillator is considered, undergoing weak position and momentum measurements between strong position measurement, and shown to possess peculiar physical properties, affecting the momentum rather than the position of another oscillator interacting with it.

EPJ Web of Conferences•Jan 1, 2014•19 citations

A NOTE ON THE STATISTICAL SAMPLING ASPECT OF DELAYED CHOICE ENTANGLEMENT SWAPPING

Karl Svozil

Quantum and classical models for delayed choice entanglement swapping by postselection of measurements are discussed.

arXiv:1608.04984•Nov 20, 2018•3 citations
We propose an asymptotic disturbance-free measurement using the so-called weak-value scheme,where the weakly measured quantum system is measured for a second time, to confirm that it is disturbance-free; moreover, the probability of obtaining the non-disturbed state must approach one. We show that the weak-measurement outcomes of the Bell state post-selected in this manner exhibit classical behavior in the sense that they satisfy the Clauser-Horne-Shimony-Holt inequality. However, the inequality is violated if all outcomes without post-selection are considered. We experimentally confirm our idea by performing joint weak measurement of polarization-entangled photon-pairs and subsequent fiber-based Bell-state measurement.
Weak value is increasingly acknowledged as an important research tool for probing quantum pre- and post-selected ensembles, where some extraordinary phenomena occur. We generalize this concept to the broader notion of "weak potential" which enables predicting the interactions between particles when one of them is pre-/post-selected and the interaction potential is small. A harmonic oscillator is considered, undergoing weak position and momentum measurements between strong position measurement, and shown to possess peculiar physical properties, affecting the momentum rather than the position of another oscillator interacting with it.
Weak value is increasingly acknowledged as an important research tool for probing quantum pre- and post-selected ensembles, where some extraordinary phenomena occur. We generalize this concept into the broader notion of “weak potential” which enables predicting the interactions between particles when one of them is pre-/post-selected and the interaction potential is small. A harmonic oscillator is considered, undergoing weak position and momentum measurements between strong position measurement, and shown to possess peculiar physical properties, affecting the momentum rather than the position of another oscillator interacting with it.