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Fink, Helmut; Leschke, Hajo

doi:10.1023/a:1007819627255

Cited by 6 publications

(3 citation statements)

References 19 publications

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“…But in a dynamic space time it is clear that strictly speaking no repetition is possible, and the above disturbance argument casts additional doubt on the possibility of independent repetitions. Carrying this argument still further, into the domain of quantum cosmology, it has been debated [20] whether quantum theory may ever apply to the universe as a whole. Whether this can be resolved by showing that for typical (small) experimental setups statistical behavior can be shown to hold with probability 1 in any ensemble of universes admitted by the theory is a question far beyond the present paper.…”

Section: Distillability Beyond Spacetime Horizonsmentioning

confidence: 99%

Distillability and Positivity of Partial Transposes in General Quantum Field Systems

Verch

Werner

2005

Rev. Math. Phys.

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Criteria for distillability, and the property of having a positive partial transpose, are introduced for states of general bipartite quantum systems. The framework is sufficiently general to include systems with an infinite number of degrees of freedom, including quantum fields. We show that a large number of states in relativistic quantum field theory, including the vacuum state and thermal equilibrium states, are distillable over subsystems separated by arbitrary spacelike distances. These results apply to any quantum field model. It will also be shown that these results can be generalized to quantum fields in curved spacetime, leading to the conclusion that there is a large number of quantum field states which are distillable over subsystems separated by an event horizon.

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Section: Distillability Beyond Spacetime Horizonsmentioning

confidence: 99%

Distillability and Positivity of Partial Transposes in General Quantum Field Systems

Verch

Werner

2005

Rev. Math. Phys.

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“…In these atomic examples the various particles already exist. But now the "particle" is the universe itself coming into existence -this is claimed not to be possible with the Copenhagen interpretation of quantum mechanics [193] but might be formulated in terms of generalized quantum mechanics [156]. Note also that the barrier to be tunnelled through is dependent on having closed k = 1 curvature.…”

Section: Cosmological Constant λ Casementioning

confidence: 99%

“…In these atomic examples, the various particles already exist. But now the 'particle' is the universe itself coming into existence-this is claimed not to be possible with the Copenhagen interpretation of quantum mechanics [193] but might be formulated in terms of generalized quantum mechanics [156]. Note also that the Although such models can have apparently infinite size and so infinite action one can instead topologically compactify the space at arbitrary small size [164,194,130].…”

Section: Cosmological Constant Casementioning

confidence: 99%

Quantum cosmological models

Coule

2005

Class. Quantum Grav.

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We contrast the initial condition requirements of various contemporary cosmological models including inflationary and bouncing cosmologies.Canonical quantization of general relativity is used, as a first approximation to full quantum gravity, to determine whether suitable initial conditions are present.Various proposals such as Hartle-Hawking's "no boundary ", or Tunnelling boundary conditions are assessed on grounds of naturalness and fine tuning. Alternatively a quiescent initial state or an initial closed time-like curve "time machine" is considered. Possible extensions to brane models are also addressed. Further ideas about universe creation from a meta-universe are outlined.Semiclassical and time asymmetry requirements of cosmology are briefly discussed and contrasted with the black hole final state proposal.We compare the recent loop quantum cosmology of Bojowald and co-workers with these earlier schemes. A number of possible difficulties and limitations are outlined.

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Decoherence and Triorthogonal Decomposition

Auletta

2004

International Journal of Theoretical Physics

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Cited by 6 publications

References 19 publications

Distillability and Positivity of Partial Transposes in General Quantum Field Systems

Distillability and Positivity of Partial Transposes in General Quantum Field Systems

Quantum cosmological models

Decoherence and Triorthogonal Decomposition

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