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result(s) for
"Quantum theory Fiction."
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The singularities
\"From the revered, Booker Prize-winning author comes a playful, multi-layered novel of nostalgia, life and death, and quantum theory, which opens with the return of one of his most celebrated characters-Freddie Montgomery from The Book of Evidence-as he is released from prison. A man with a borrowed name steps from a flashy red sportscar-also borrowed-onto the estate of his youth. But all is not as it seems. There is a new family living in the drafty old house: the Godleys, descendants of the late, world-famous scientist Adam Godley, whose theory of existence threw the universe into chaos. And this mystery man, who has just completed a prison sentence, feels as if time has stopped, or was torn, or was opened in new and strange ways. He must now vie with the dysfunctional Godley family, with their harried housekeeper who becomes his landlady, with the recently commissioned biographer of Godley Sr., and with a wealthy and beautiful woman from his past who comes bearing an unusual request. With sparkling intelligence and rapier wit, John Banville revisits some of his career's most memorable characters, in a novel as mischievous as it is brilliantly conceived. The Singularities occupies a singular space and will surely be one of his most admired works\"-- Provided by publisher.
Book
Warp drive aerodynamics
A
bstract
In this work we analyse the potential for a warp drive spacetime to develop instabilities due to the presence of quantum matter. Particularly, we look for points of infinite blueshift (which are analogous to points of a black hole inner horizon, known for its semiclassical instability), and categorise them through the behaviour of geodesics in their vicinity. We find that warp-drive bubbles in dimension 2+1 or higher are in fact likely to be stable, as they generally contain only isolated points where divergences are approached, leading to a finite limit for the overall accumulation of destabilising energy. Furthermore, any semiclassical instabilities in the warp drive due to energy-density buildups can be further diminished with particular, more “aerodynamic” shapes and trajectories for the drive.
Journal Article
Timeline
A Yale history professor travels back in time to 15th century France and gets stuck, unable to return to the present. His colleagues organize a rescue and on landing in France become involved in the Hundred Years War.
Book
Did physicists create a wormhole in a quantum computer?
An unusual teleportation experiment uses ordinary quantum physics, but was inspired by tunnels in an exotic ‘toy universe’.
An unusual teleportation experiment uses ordinary quantum physics, but was inspired by tunnels in an exotic ‘toy universe’.
Journal Article
A comparative study of wormhole geometries under two different modified gravity formalism
In the current article, we discuss the wormhole geometries in two different gravity theories, namely
F
(
Q
,
T
)
gravity and
F
(
R
,
T
)
gravity. In these theories,
Q
is called a non-metricity scalar,
R
stands for the Ricci scalar, and
T
denotes the trace of the energy–momentum tensor (EMT). The main goal of this study is to comprehensively compare the properties of wormhole solutions within these two modified gravity frameworks by taking a particular shape function. The conducted analysis shows that the energy density is consistently positive for wormhole models in both gravity theories, while the radial pressure is positive for
F
(
Q
,
T
)
gravity and negative in
F
(
R
,
T
)
gravity. Furthermore, the tangential pressure shows reverse behavior in comparison to the radial pressure. By using the Tolman-Oppenheimer-Volkov (TOV) equation, the equilibrium aspect is also described, which indicates that hydrostatic force dominates anisotropic force in the case of
F
(
Q
,
T
)
gravity theory, while the reverse situation occurs in
F
(
R
,
T
)
gravity, i.e., anisotropic force dominates hydrostatic force. Moreover, using the concept of the exoticity parameter, we observed the presence of exotic matter at or near the throat in the case of
F
(
Q
,
T
)
gravity while matter distribution is exotic near the throat but normal matter far from the throat in
F
(
R
,
T
)
gravity case. In conclusion, precise wormhole models can be created with a potential NEC and DEC violation at the throat of both wormholes while having a positive energy density, i.e.,
ρ
>
0
.
Journal Article
Degree Distribution in Quantum Walks on Complex Networks
In this theoretical study, we analyze quantum walks on complex networks, which model network-based processes ranging from quantum computing to biology and even sociology. Specifically, we analytically relate the average long-time probability distribution for the location of a unitary quantum walker to that of a corresponding classical walker. The distribution of the classical walker is proportional to the distribution of degrees, which measures the connectivity of the network nodes and underlies many methods for analyzing classical networks, including website ranking. The quantum distribution becomes exactly equal to the classical distribution when the walk has zero energy, and at higher energies, the difference, the so-called quantumness, is bounded by the energy of the initial state. We give an example for which the quantumness equals a Rényi entropy of the normalized weighted degrees, guiding us to regimes for which the classical degree-dependent result is recovered and others for which quantum effects dominate.
Journal Article
Quantum fictivism
Quantum mechanics is arguably our most successful physical theory, yet the nature of the quantum state still constitutes an ongoing controversy. This paper proposes, articulates, and defends a metaphysical interpretation of the quantum state that is fictionalist in spirit since it regards quantum states as representing a fictional ontology. Such an ontology is therefore not physical, and yet it provides a reference for the language used in quantum mechanics and has explanatory power. In this sense, this view, akin to Allori’s recent account of wavefunctionalism, combines elements of the representationalist and anti-representationalist camps and aims to be the best of both worlds.
Journal Article
Relativity and the World of Molecules
Ghosh and Ruud asserts that mention Albert Einstein's theory of relativity to people and it commonly conjures up a sci-fi world of time travel and black holes. Relativity also plays a critical, if somewhat less widely known, role in many real-world devices that define modern life--cell phones, TVs, and GPS devices. However, in chemistry--the world of molecules, materials, medicines, and their transformations--relativity is scarcely ever mentioned, especially at the introductory level. Indeed, the word is likely to draw blank stares even among professional chemists. Some well-informed chemists would perhaps point out that the unique color of gold and the liquidity of mercury are manifestations of relativity. A handful may even recall media reports that lead-acid batteries derive some 80 percent of their power from relativistic effects. Electron spin is a consequence of merging special relativity with quantum mechanics, so every spin effect is also a relativistic effect.
Journal Article
How scientific models can explain
Scientific models invariably involve some degree of idealization, abstraction, or nationalization of their target system. Nonetheless, I argue that there are circumstances under which such false models can offer genuine scientific explanations. After reviewing three different proposals in the literature for how models can explain, I shall introduce a more general account of what I call model explanations, which specify the conditions under which models can be counted as explanatory. I shall illustrate this new framework by applying it to the case of Bohr's model of the atom, and conclude by drawing some distinctions between phenomenological models, explanatory models, and fictional models.
Journal Article