Multiverse interpretation of quantum mechanics

  title={Multiverse interpretation of quantum mechanics},
  author={Raphael Bousso and Leonard Susskind},
  journal={Physical Review D},
We argue that the many-worlds of quantum mechanics and the many worlds of the multiverse are the same thing, and that the multiverse is necessary to give exact operational meaning to probabilistic predictions from quantum mechanics. Decoherence - the modern version of wave-function collapse - is subjective in that it depends on the choice of a set of unmonitored degrees of freedom, the "environment". In fact decoherence is absent in the complete description of any region larger than the future… 
A Phenomenological Reading of the Many-Worlds Interpretation of Quantum Mechanics
The Many-Worlds Interpretation (MWI) of quantum mechanics, the rendition of quantum mechanics discovered by theoretical physicist, Hugh Everett III, postulates a radical rendition of reality. MWI is
The High-Energy Interpretation of Quantum Mechanics
We address the issue of the interpretation of quantum mechanics by asking why the issue never arises in the description of high-energy interactions. We argue that several tenets of quantum mechanics,
The Minimal Modal Interpretation of Quantum Theory
We introduce a realist, unextravagant interpretation of quantum theory that builds on the existing physical structure of the theory and allows experiments to have definite outcomes but leaves the
Quantum Mechanics, Spacetime Locality, and Gravity
Quantum mechanics introduces the concept of probability at the fundamental level, yielding the measurement problem. On the other hand, recent progress in cosmology has led to the “multiverse”
Are there really many worlds in the "Many-worlds interpretation" of Quantum Mechanics?
Since the 1970s, the Everett-Wheeler many-worlds interpretation (MWI) of Quantum Mechanics (1955) has been much in the news. One wonders about the worlds in question, their branches, their
Reformulation of quantum mechanics and strong complementarity from Bayesian inference requirements
The reformulation, with the addition of novel transition probability arithmetic, resolves the measurement problem completely, thereby eliminating subjectivity of measurements from quantum mechanics.
A quantum measure of the multiverse
It has been recently suggested that probabilities of different events in the multiverse are given by the frequencies at which these events are encountered along the worldline of a geodesic observer
The Cosmological Constant in the Quantum Multiverse
Recently, a new framework for describing the multiverse has been proposed which is based on the principles of quantum mechanics. The framework allows for well-defined predictions, both regarding
Physics Beyond the Multiverse: Naturalness and the Quest for a Fundamental Theory
  • H. Päs
  • Physics, Philosophy
    Foundations of Physics
  • 2019
Finetuning and Naturalness are extra-empirical theory assessments that reflect our expectation how scientific theories should provide an intuitive understanding about the foundations underlying the
Constraints on Cosmology and Quantum Gravity from Quantum Mechanics and Quantum Field Theory
Typical cosmological states have structure, obey to very good approximation the laws of classical physics on large scales, and are far from equilibrium. Typical quantum-mechanical states have none of


Physical theories, eternal inflation, and the quantum universe
A bstractInfinities 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
Born in an Infinite Universe: A Cosmological Interpretation of Quantum Mechanics
We study the quantum measurement problem in the context of an infinite, statistically uniform space, as could be generated by eternal inflation. It has recently been argued that when identical copies
Decoherence, einselection, and the quantum origins of the classical
as quantum engineering. In the past two decades it has become increasingly clear that many (perhaps all) of the symptoms of classicality can be induced in quantum systems by their environments. Thus
The world as a hologram
According to ’t Hooft the combination of quantum mechanics and gravity requires the three‐dimensional world to be an image of data that can be stored on a two‐dimensional projection much like a
Dimensional Reduction in Quantum Gravity
The requirement that physical phenomena associated with gravitational collapse should be duly reconciled with the postulates of quantum mechanics implies that at a Planckian scale our world is not
The stretched horizon and black hole complementarity.
Three postulates asserting the validity of conventional quantum theory, semiclassical general relativity, and the statistical basis for thermodynamics are introduced as a foundation for the study of
Multiverse Understanding of Cosmological Coincidences
There is a deep cosmological mystery: although dependent on very different underlying physics, the time scales of structure formation, of galaxy cooling (both radiatively and against the CMB), and of
A single quantum cannot be cloned
If a photon of definite polarization encounters an excited atom, there is typically some nonvanishing probability that the atom will emit a second photon by stimulated emission. Such a photon is
An Holographic cosmology
Decoherence, the measurement problem, and interpretations of quantum mechanics
Environment-induced decoherence and superselection have been a subject of intensive research over the past two decades, yet their implications for the foundational problems of quantum mechanics, most