# Quantum theory as a universal physical theory

@article{Deutsch1985QuantumTA, title={Quantum theory as a universal physical theory}, author={David Deutsch}, journal={International Journal of Theoretical Physics}, year={1985}, volume={24}, pages={1-41} }

The problem of setting up quantum theory as a universal physical theory is investigated. It is shown that the existing formalism, in either the conventional or the Everett interpretation, must be supplemented by an additional structure, the “interpretation basis.” This is a preferred ordered orthonormal basis in the space of states. Quantum measurement theory is developed as a tool for determining the interpretation basis. The augmented quantum theory is discussed.

## 247 Citations

Unitary quantum theory is incompatible with special relativity

- Physics, Philosophy
- 2018

It is shown that the combination of unitary quantum theory and special relativity may lead to a contradiction when considering the EPR correlations in different inertial frames in a…

Preferred basis in the many-worlds interpretation of quantum mechanics and quantum cosmology

- Physics
- 1990

The authors revive an old proposal of Zeh (1986) for the preferred basis in the many-worlds interpretation of quantum mechanics. The algorithm for this basis reduces to the eigenvalue problems for…

Quantum Prediction Algorithms

- Physics
- 1997

The consistent histories formulation of the quantum theory of a closed system with pure initial state defines an infinite number of incompatible consistent sets, each of which gives a possible…

2 00 2 Locality in the Everett Interpretation of Quantum Field Theory

- Physics
- 2002

Recently it has been shown that transformations of Heisenberg-picture operators are the causal mechanism which allows Bell-theorem-violating correlations at a distance to coexist with locality in the…

A pr 2 00 2 Locality in the Everett Interpretation of Quantum Field Theory ∗

- Physics
- 2002

Recently it has been shown that transformations of Heisenberg-picture operators are the causal mechanism which allows Bell-theorem-violating correlations at a distance to coexist with locality in the…

An Introduction to Many Worlds in Quantum Computation

- Physics
- 2008

It is found that using this particular many-worlds theory as a physical foundation for quantum computation gives several distinct advantages over other interpretations, and over not interpreting quantum theory at all.

A Brief Overview of the Leading Interpretations of Quantum Mechanics

- Physics
- 2021

This article attempts to present brief outlines of the leading interpretations of quantum mechanics. Many-worlds, relational, von Neumann–Wigner, Copenhagen and hidden variable are examined.…

Interpretations of Quantum Mechanics

- Physics
- 2009

An interpretation of quantum mechanics is a set of statements which attempt to explain how quantum mechanics informs our understanding of nature. Although quantum mechanics has held up to rigorous…

Many Minds and Single Mind Interpretations of Quantum Theory

- Psychology
- 2000

A role for consciousness was invoked very early in the history of quantum theory. The founders of what may be called the Copenhagen and Princeton interpretations, Bohr and von Neumann, both referred…

Steps in the philosophy of quantum theory

- Philosophy
- 1991

1. Interpretation. The Copenhagen Interpretation (CI) is a minimal semantics to quantum theory, expressing what we know at least. It can be extended into a universal Quantum Theory, applied to the…

## References

SHOWING 1-10 OF 38 REFERENCES

"Relative State" Formulation of Quantum Mechanics

- Physics
- 1957

The task of quantizing general relativity raises serious questions about the meaning of the present formulation and interpretation of quantum mechanics when applied to so fundamental a structure as…

Conceptual Foundations Of Quantum Mechanics

- Physics, Education
- 1971

A detailed view of the conceptual foundations and problems of quantum physics by a highly regarded French theoretical physicist.. Conceptual Foundations of Quantum Mechanics provides a detailed view…

Can Quantum-Mechanical Description of Physical Reality Be Considered Complete?

- Philosophy
- 1935

Consideration of the problem of making predictions concerning a system on the basis of measurements made on another system that had previously interacted with it leads to the result that one is led to conclude that the description of reality as given by a wave function is not complete.

Decaying states in the rigged Hilbert space formulation of quantum mechanics

- Physics
- 1980

Within the rigged Hilbert space formulation of quantum mechanics idealized resonances (without background) are described by generalized eigenvectors of an essentially self‐adjoint Hamiltonian with…

Quantum mechanics and reality

- Physics
- 1970

Despite its enormous practical success, quantum theory is so contrary to intuition that, even after 45 years, the experts themselves still do not all agree what to make of it. The area of…

The Macroscopic Level of Quantum Mechanics

- PhysicsNature
- 1972

The problem of relating the quantum mechanical description of atomic processes to the behaviour of matter in bulk is resolved in a conceptually simple treatment.

On the Einstein-Podolsky-Rosen paradox

- Physics
- 1964

THE paradox of Einstein, Podolsky and Rosen [1] was advanced as an argument that quantum mechanics could not be a complete theory but should be supplemented by additional variables. These additional…

Lyapounov variable: Entropy and measurement in quantum mechanics.

- PhysicsProceedings of the National Academy of Sciences of the United States of America
- 1979

It is found that no dynamical variable with the characteristic properties of nonequilibrium entropy can be defined in the standard formulation of quantum mechanics, and the question of existence of entropy of superoperators M is closely linked to the problem of defining an operator of time in quantum mechanics.

Grundlagen der Quantenmechanik

- PhysicsNature
- 1936

THIS brief but excellent introduction to quantum mechanics is likely to appeal much more to the mathematician than to the experimental physicist, for, as its title suggests, it deals rather with the…