What is Quantum Entanglement?

2020 ◽  
pp. 109-119
Author(s):  
Gershon Kurizki ◽  
Goren Gordon
Keyword(s):  
Quantum Entanglement ◽  
The State ◽  
The Other ◽  
Entangled State ◽  
Quantum Objects ◽  
The Common ◽  
The Universe ◽  
Non Locality

In this adventure, two quantum characters interact, because Henry has constructed a quantum suit for his cat, Schred. Henry and Schred end up in a quantum-entangled state. Remarkably, by measuring one of two entangled systems, the state of the other system is immediately collapsed, even if they are far apart. This bizarre feature of entanglement implies non-locality—synchronization or “collusion” between quantum objects, regardless of their distance. Cosmology provides an explanation: the universe emerged from a unified state describable as a quantum-entangled “hologram”. This notion resonates with the ancient Hindu view that the common essence of all things, the Brahman, can be revealed at every level of the natural hierarchy. The appendix to this chapter discusses operators that create entanglement.

scholarly journals How to Erase Quantum Monogamy?

2021 ◽  
Vol 3 (1) ◽  
pp. 53-67
Author(s):  
Ghenadie Mardari
Keyword(s):  
Quantum System ◽  
Quantum Entanglement ◽  
The Other ◽  
Arrow Of Time ◽  
Quantum Level ◽  
Delayed Choice ◽  
Other Hand ◽  
The One ◽  
Quantum Erasure ◽  
Non Locality

The phenomenon of quantum erasure exposed a remarkable ambiguity in the interpretation of quantum entanglement. On the one hand, the data is compatible with the possibility of arrow-of-time violations. On the other hand, it is also possible that temporal non-locality is an artifact of post-selection. Twenty years later, this problem can be solved with a quantum monogamy experiment, in which four entangled quanta are measured in a delayed-choice arrangement. If Bell violations can be recovered from a “monogamous” quantum system, then the arrow of time is obeyed at the quantum level.

scholarly journals Effects of a scalar field on the thermodynamics of interuniversal entanglement

2014 ◽  
Vol 23 (05) ◽  
pp. 1450043 ◽  
Author(s):  
Iñaki Garay ◽  
Salvador Robles-Pérez
Keyword(s):  
Scalar Field ◽  
Boundary Conditions ◽  
The State ◽  
Entangled State ◽  
Bogoliubov Transformation ◽  
The Universe

We consider a multiverse scenario made up of classically disconnected regions of the spacetime that are, nevertheless, in a quantum entangled state. The addition of a scalar field enriches the model and allows us to treat both the inflationary and the "oscillatory stage" of the universe on the same basis. Imposing suitable boundary conditions on the state of the multiverse, two different representations are constructed related by a Bogoliubov transformation. We compute the thermodynamic magnitudes of the entanglement, such as entropy and energy, explore the effects introduced by the presence of the scalar field and compare with previous results in the absence of scalar field.

Unbounded entanglement in nonlocal games

2015 ◽  
Vol 15 (15&16) ◽  
pp. 1317-1332
Author(s):  
Laura Mančinska ◽  
Thomas Vidick
Keyword(s):  
Quantum Entanglement ◽  
Finite Length ◽  
Success Probability ◽  
The Other ◽  
Entangled States ◽  
Entangled State ◽  
Local Dimension ◽  
Hardy's Paradox ◽  
First Time ◽  
Quantum Strategies

Quantum entanglement is known to provide a strong advantage in many two-party distributed tasks. We investigate the question of how much entanglement is needed to reach optimal performance. For the first time we show that there exists a purely classical scenario for which no finite amount of entanglement suffices. To this end we introduce a simple two-party nonlocal game H, inspired by Lucien Hardy’s paradox. In our game each player has only two possible questions and can provide bit strings of any finite length as answer. We exhibit a sequence of strategies which use entangled states in increasing dimension d and succeed with probability 1 − O(d−c ) for some c ≥ 0.13. On the other hand, we show that any strategy using an entangled state of local dimension d has success probability at most 1 − Ω(d−2 ). In addition, we show that any strategy restricted to producing answers in a set of cardinality at most d has success probability at most 1 − Ω(d−2 ). Finally, we generalize our construction to derive similar results starting from any game G with two questions per player and finite answers sets in which quantum strategies have an advantage.

ENTANGLEMENT, LOCALITY, AND SEPARABILITY: A TREATISE ON DIFFERENT VIEWPOINTS

2007 ◽  
Vol 05 (01n02) ◽  
pp. 157-167 ◽  
Author(s):  
THOMAS KESSEMEIER ◽  
THOMAS KRÜGER
Keyword(s):  
Quantum Mechanics ◽  
The Other ◽  
Statistical Interpretation ◽  
Interpretation Of Quantum Mechanics ◽  
Bell’S Inequality ◽  
Other Hand ◽  
The Common ◽  
Statistical Operator ◽  
Definition Of ◽  
Non Locality

Within the framework of a statistical interpretation of quantum mechanics, entanglement (in a mathematical sense) manifests itself in the non-separability of the statistical operator ρ representing the ensemble in question. In experiments, on the other hand, entanglement can be detected, in the form of non-locality, by the violation of Bell's inequality Δ ≤ 2. How can these different viewpoints be reconciled? We first show that (non-)separability follows different laws to (non-)locality, and, moreover, it is much more difficult to characterize as long as the mostly employed operational rather than an ontic definition of separability is used. In consequence, (i) "entanglement" has two different meanings which may or may not be realized simultaneously on one and the same ensemble, and (ii) we have to disadvise the use of the common separability definition which is still employed by the majority of the physical community.

scholarly journals Chico Mendes Lives: Amazon women in defense of life

2021 ◽  
Vol 24 ◽  
Author(s):  
Angela Mendes ◽  
Claudelice Santos ◽  
Edel Moraes ◽  
Sônia Bone Guajajara
Keyword(s):  
Political Ecology ◽  
Indigenous Peoples ◽  
Latin American ◽  
Common Good ◽  
The Other ◽  
The Common Good ◽  
The Common ◽  
Mother Earth ◽  
Amazon Women ◽  
The Universe

Abstract This narrative is the result of the round of talks “Chico Mendes Vive”, held during the III Latin American Congress of Political Ecology. It is a living experience of four Amazonian women, Angela Mendes, Claudelice Santos, Edel Moraes and Sônia Guajajara, whose speeches emerge from the experience of indigenous, black, cabocla, agro-extractivist women, who make of their lives a struggle in defense of Mother Earth and of the “common good”, which aggregates, welcomes and feeds all the other forms of being in the universe. This narrative expresses the continuity of the re-existence of native and indigenous peoples, the reconnection of the peoples of the forest, water and countryside, through the legacy left by Chico Mendes, a son of the Amazon, who was assassinated for defending and fighting for life.

scholarly journals Local merger rates of double neutron stars

2018 ◽  
Vol 14 (S346) ◽  
pp. 433-443 ◽  
Author(s):  
Martyna Chruslinska
Keyword(s):  
Mass Transfer ◽  
The Other ◽  
Local Universe ◽  
Common Envelope ◽  
Model Predictions ◽  
Angular Momentum Loss ◽  
History Of ◽  
The Common ◽  
The Universe ◽  
Rule Out

AbstractThe first detection of gravitational waves from a merging double neutron star (DNS) binary implies a much higher rate of DNS coalescences in the local Universe than typically estimated on theoretical grounds. The recent study by Chruslinska et al. (2018) shows that apart from being particularly sensitive to the common envelope treatment, DNS merger rates appear rather robust against variations of several factors probed in their study (e.g. conservativeness of the mass transfer, angular momentum loss, and natal kicks), unless extreme assumptions are made. Confrontation with the improving observational limits may allow to rule out some of the extreme models. To correctly compare model predictions with observational limits one has to account for the other factors that affect the rates. One of those factors relates to the assumed history of star formation and chemical evolution of the Universe and its impact on the final results needs to be better constrained.

scholarly journals On the Common Shrew-mole in Illinois

1910 ◽  
Vol 9 (1-12) ◽  
pp. 1-13
Author(s):  
Frank Wood
Keyword(s):  
Common Shrew ◽  
The State ◽  
The Other ◽  
The Common ◽  
The One ◽  
Condylura Cristata

There are two species of moles in Illinois: one, the starnose mole, Condylura cristata (Linnaeus) is found sparingly in the northern part of the state; the other, known as the common or shrew-mole, Scalopus aquaticus (Linnaeus), is the one with which this paper deals. It is distributed throughout most of the state, and apparently all our specimens may be referred to the western subspecies machrinus (Rafinesque). 

scholarly journals Three Takes on De-Colonizing the State Apparatus in Bolivia

2020 ◽  
Vol 25 ◽  
pp. 60-64
Author(s):  
Chuck Sturtevant
Keyword(s):  
Common Ground ◽  
Indigenous Communities ◽  
The State ◽  
The Other ◽  
Other Hand ◽  
State Apparatus ◽  
The Common ◽  
The Government

This response summarizes and compares three scholars’ approaches (Marcelo Bohrt, Robert Albro and Pamela Calla) to the Morales administration’s efforts to decolonize the government of Bolivia. Seeking   the common ground among them, I find that all three recognize the importance of symbolic and discursive changes, which have allowed  some previously-excluded individuals to access positions of authority within the state apparatus. On the other hand, these changes have been uneven, exposing rifts between indigenous communities, exacerbating existing inequities, and establishing new or renewed hierarchies of subordination.   

scholarly journals How to Erase Guantum Monogamy?

2020 ◽  
Author(s):  
Ghenadie Mardari
Keyword(s):  
Quantum System ◽  
Quantum Entanglement ◽  
The Other ◽  
Arrow Of Time ◽  
Quantum Level ◽  
Other Hand ◽  
The One ◽  
Quantum Erasure ◽  
Non Locality

The phenomenon of quantum erasure exposed a remarkable ambiguity in the interpretation of quantum entanglement. On the one hand, the data is compatible with the possibility of arrow-of-time violations. On the other hand, it is also possible that temporal non-locality is an artifact of post-selection. Twenty years later, this problem can be solved with a quantum monogamy experiment, in which four entangled quanta are measured at the same time. If Bell violations can be recovered from a “monogamous” quantum system, then the arrow of time is obeyed at the quantum level.

Photoemission process — Relation with quantum entanglement

2018 ◽  
Vol 33 (18) ◽  
pp. 1850105
Author(s):  
J. T. Wang ◽  
J. D. Fan
Keyword(s):  
Quantum Mechanics ◽  
Quantum Entanglement ◽  
The Other ◽  
Action At A Distance ◽  
The Universe

It is well known that an electron has either spin-up or spin-down state and a photon has two possible polarizations called spin [Formula: see text] or spin [Formula: see text]. But when two particles are created, the two particles can have 50% of one state and 50% in the other. This is called the two particles in quantum entanglement. The spooky thing is that an event at one point in the universe can instantaneously affect the event that is arbitrarily far away between these two particles. a The entanglement of the two particles can be electron or photon. We believe, in order to study this phenomenon we have to study further than the previously established principles of quantum mechanics, that is, to study how an electron creates a photon and how it interacts with the photon emitted. a Quantum entanglement simplified-video results — Quantum entanglement and spooky action at a distance, youtube.com, two years ago.

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