(h) Dual identities / Masking

Guth, Stephan

doi:10.5617/jais.6138

Cited by 3 publications

(5 citation statements)

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“…In this case, you can use N SM , N SUSY , and N technicolor , instead of N "you" in SM , N "you" in SUSY , and N "you" in technicolor , to compute relative probabilities for each TeV-scale physics describing your own universe. 6 Of course, in the context of predicting results at the LHC, "SUSY" should mean the existence of superpartners within the reach of the LHC. Note that when selecting samples for N SM , N SUSY , N technicolor , ..., the condition was imposed that physics below a TeV scale is described by the standard models of particle physics and cosmology, with various parameters-such as the electron mass, fine structure constant, dark matter abundance, and baryon-to-photon ratio-taking the observed values (within experimental errors).…”

Section: Predictions In Practicementioning

confidence: 99%

“…This elegant picture, however, suffers from the issue of predictivity arising from infinities associated with eternally inflating spacetime, known as the measure problem [5]. In fact, it is often said that "In an eternally inflating universe, anything that can happen will happen; in fact, it will happen an infinite number of times" [6]. While this sentence captures well the origin of the issue, its precise meaning is not as clear as one might naively think.…”

Section: Introductionmentioning

confidence: 99%

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Physical theories, eternal inflation, and the quantum universe

Nomura

2011

J. High Energ. Phys.

100

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Infinities in eternal inflation have long been plaguing cosmology, making any predictions highly sensitive to how they are regulated. The problem exists already at the level of semiclassical general relativity, and has a priori nothing to do with quantum gravity. On the other hand, we know that certain problems in semi-classical gravity, for example physics of black holes and their evaporation, have led to understanding of surprising, quantum natures of spacetime and gravity, such as the holographic principle and horizon complementarity.In this paper, we present a framework in which well-defined predictions are obtained in an eternally inflating multiverse, based on the principles of quantum mechanics. We show that the entire multiverse is described purely from the viewpoint of a single "observer," who describes the world as a quantum state defined on his/her past light cones bounded by the (stretched) apparent horizons. We find that quantum mechanics plays an essential role in regulating infinities. The framework is "gauge invariant," i.e. predictions do not depend on how spacetime is parametrized, as it should be in a theory of quantum gravity.Our framework provides a fully unified treatment of quantum measurement processes and the multiverse. We conclude that the eternally inflating multiverse and many worlds in quantum mechanics are the same. Other important implications include: global spacetime can be viewed as a derived concept; the multiverse is a transient phenomenon during the world relaxing into a supersymmetric Minkowski state. We also present a theory of "initial conditions" for the multiverse. By extrapolating our framework to the extreme, we arrive at a picture that the entire multiverse is a fluctuation in the stationary, fractal "mega-multiverse," in which an infinite sequence of multiverse productions occurs.The framework discussed here does not suffer from problems/paradoxes plaguing other measures proposed earlier, such as the youngness paradox, the Boltzmann brain problem, and a peculiar "end" of time.

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Section: Predictions In Practicementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Physical theories, eternal inflation, and the quantum universe

Nomura

2011

J. High Energ. Phys.

100

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“…This interrogation of women's new place in the political arena is mirrored in Mohamed Diab's Clash (2016) where two of them express the dual reality of the new Egypt that emerged from the Revolution (Guth 2017). The film follows the debates of pro and anti-Morsi protesters who have been trapped together in a police van after being arrested.…”

Section: Renewing the Representation Of Women Via Social And Politicamentioning

confidence: 99%

Representing Women On Screen In Egypt After 2011: Evolution and Revolution

2019

Cairo Studies in English

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“…The inflation paradigm [1,2,3,4,5] solves a number of cosmological problems, including the horizon problem, the flatness-age problem and the problem of the origin of density inhomogeneities [6]. Its essential feature is a super-luminal expansion of the universe at very early times.…”

Section: Introductionmentioning

confidence: 99%

“…One of the perhaps more natural mechanisms for localising the field away from its absolute minimum is based on the temperature-dependent effective potential (of a form similar to that in figure 1) of the scalar field, where at high temperature the minimum of the potential is at the origin but at temperatures below a critical temperature the absolute minimum takes some other value (any remaining local minimum at the origin being labeled the false vacuum). The first inflation models assumed a strong first order phase transition from the false to true vacuum [1] and the time before this tunneling process occurred gives the duration of the exponential expansion. However, if this tunneling time is too large, the phase transition, turning false vacuum into true vacuum, will never be completed.…”

Section: Introductionmentioning

confidence: 99%