Results 11 to 20 of about 4,887 (84)

Bell’s “Theorem”: loopholes vs. conceptual flaws

open access: yesOpen Physics, 2017
An historical overview and detailed explication of a critical analysis of what has become known as Bell’s Theorem to the effect that, it should be impossible to extend Quantum Theory with the addition of local, real variables so as to obtain a version ...
Kracklauer A. F.
doaj   +1 more source

Experimental observation of entanglement duality for identical particles

open access: yesNew Journal of Physics, 2014
It was shown recently that entanglement of identical particles has a feature called dualism (Bose and Home 2013 Phys. Rev. Lett. http://dx.doi.org/10.1103/PhysRevLett.110.265701 110 http://dx.doi.org/10.1103/PhysRevLett.110.265701 ), which is ...
J-J Ma   +5 more
doaj   +1 more source

"All-versus-nothing" nonlocality test of quantum mechanics by two-photon hyperentanglement

open access: yes, 2005
We report the experimental realization and the characterization of polarization and momentum hyperentangled two photon states, generated by a new parametric source of correlated photon pairs.
C. Cinelli   +8 more
core   +1 more source

Advantages and disadvantages of maximally entangled states in dilaton black hole background

open access: yesPhysics Letters B
We investigate quantum entanglement and coherence for four classes of Bell-like fermionic states in the vicinity of the event horizon of a Garfinkle-Horowitz-Strominger (GHS) dilaton black hole. Contrary to the common expectation that maximally entangled
Zhen Yang, He Cheng, Si-Han Li
doaj   +1 more source

Operational discord measure for Gaussian states with Gaussian measurements

open access: yesNew Journal of Physics, 2015
We introduce an operational discord-type measure for quantifying nonclassical correlations in bipartite Gaussian states based on using Gaussian measurements. We refer to this measure as operational Gaussian discord (OGD).
Saleh Rahimi-Keshari   +2 more
doaj   +1 more source

On the comparison of volumes of quantum states

open access: yes, 2010
This paper aims to study the $\a$-volume of $\cK$, an arbitrary subset of the set of $N\times N$ density matrices. The $\a$-volume is a generalization of the Hilbert-Schmidt volume and the volume induced by partial trace. We obtain two-side estimates for
Deping Ye   +8 more
core   +1 more source

Extracting the physical sector of quantum states

open access: yesNew Journal of Physics, 2017
The physical nature of any quantum source guarantees the existence of an effective Hilbert space of finite dimension, the physical sector, in which its state is completely characterized with arbitrarily high accuracy.
D Mogilevtsev   +8 more
doaj   +1 more source

Implementation of quantum state tomography for time-bin qudits

open access: yesNew Journal of Physics, 2017
Quantum state tomography (QST) is an essential tool for characterizing an unknown quantum state. Recently, QST has been performed for entangled qudits based on orbital angular momentum, time-energy uncertainty, and frequency bins.
Takuya Ikuta, Hiroki Takesue
doaj   +1 more source

The Consumption of Reference Resources [PDF]

open access: yes, 2008
Under the operational restriction of the U(1)-superselection rule, states that contain coherences between eigenstates of particle number constitute a resource.
Alexander Lvovsky   +3 more
core   +2 more sources

Quantum steering for different types of Bell-like states in gravitational background

open access: yesPhysics Letters B
In a relativistic framework, it is generally accepted that quantum steering of maximally entangled states provides greater advantages in practical applications compared to non-maximally entangled states. In this paper, we investigate quantum steering for
Si-Han Li, Si-Han Shang, Shu-Min Wu
doaj   +1 more source

Home - About - Disclaimer - Privacy