quantum entanglement
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Oral Oncology ◽  
2022 ◽  
Vol 125 ◽  
pp. 105704
Author(s):  
Rahul Anand ◽  
Deepak Pandiar ◽  
Pratibha Ramani ◽  
Mala Kamboj

2022 ◽  
Vol 71 (1) ◽  
pp. 1-7
Author(s):  
Fan Hong-yi ◽  
◽  
Wu Ze ◽  

2021 ◽  
Vol 34 (4) ◽  
pp. 582-582
Author(s):  
Dean L. Mamas

A polarized photon interacts with a polarizer through the component of the photon’s electric field which is aligned with the polarizer. This component varies as the cosine of the angle through which the polarizer is rotated, explaining the cosine observed in Bell test data. Quantum mechanics is unnecessary and plays no role.


Entropy ◽  
2021 ◽  
Vol 24 (1) ◽  
pp. 49
Author(s):  
Dmitry Makarov ◽  
Yuliana Tsykareva

It is well known that the waveguide beam splitter can be used as a source for the quantum entanglement of photons. The analysis of such quantum entanglement is a difficult problem even for monochromatic photons, since the system under study is multiparametric. This paper will show that quantum entanglement can be represented in a simple form not only for monochromatic photons but also for non-monochromatic ones. It will be shown that quantum entanglement for non-monochromatic photons can be very different from monochromatic photons, which can be used to create large quantum entanglement.


2021 ◽  
Vol 127 (25) ◽  
Author(s):  
Johan E. Runeson ◽  
Jeremy O. Richardson

2021 ◽  
Author(s):  
Armel Azangue Koumetio ◽  
Yiande Deuto Germain ◽  
Alain Giresse Tene ◽  
Martin Tchoffo

Abstract In the present paper, we study the influence of non-commutativity on entanglement in a system of two oscillators-modes in interaction with its environment. The considered system is a two-dimensional harmonic oscillator in non-commuting spatial coordinates coupled to its environment. The dynamics of the covariance matrix, the separability criteria for two Gaussian states in non-commutative space coordinates, and the logarithmic negativity are used to evaluate the quantum entanglement in the system, which is compared to the commutative space coordinates case. The result is applied for two initially entangled states, namely the squeezed vacuum and squeezed thermal states. It can be observed that the phenomenon of entanglement sudden death appears more early in the system for the case of squeezed vacuum state than in the case of squeezed thermal state. Thereafter, it is also observed that non-commutativity effects lead to an increasing of entanglement of initially entangled quantum states, and reduce the separability in the open quantum system. It turns out that a separable state in the usual commutative quantum mechanics might be entangled in non-commutative extension.


Entropy ◽  
2021 ◽  
Vol 23 (12) ◽  
pp. 1671
Author(s):  
Lucia Gálisová ◽  
Michał Kaczor

The ground state, magnetization scenario and the local bipartite quantum entanglement of a mixed spin-1/2 Ising–Heisenberg model in a magnetic field on planar lattices formed by identical corner-sharing bipyramidal plaquettes is examined by combining the exact analytical concept of generalized decoration-iteration mapping transformations with Monte Carlo simulations utilizing the Metropolis algorithm. The ground-state phase diagram of the model involves six different phases, namely, the standard ferrimagnetic phase, fully saturated phase, two unique quantum ferrimagnetic phases, and two macroscopically degenerate quantum ferrimagnetic phases with two chiral degrees of freedom of the Heisenberg triangular clusters. The diversity of ground-state spin arrangement is manifested themselves in seven different magnetization scenarios with one, two or three fractional plateaus whose values are determined by the number of corner-sharing plaquettes. The low-temperature values of the concurrence demonstrate that the bipartite quantum entanglement of the Heisenberg spins in quantum ferrimagnetic phases is field independent, but twice as strong if the Heisenberg spin arrangement is unique as it is two-fold degenerate.


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