Cosmological constant, quantum measurement and the problem of time
نویسندگان
چکیده
منابع مشابه
Quantum Theory, Noncommutative Gravity, and the Cosmological Constant Problem
The cosmological constant problem is principally concerned with trying to understand how the zeropoint energy of quantum fields contributes to gravity. Here we take the approach that by addressing a fundamental unresolved issue in quantum theory we can gain a better understanding of the problem. Our starting point is the observation that the notion of classical time is external to quantum mecha...
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A nonlocal quantum gravity theory is presented which is finite and unitary to all orders of perturbation theory. Vertex form factors in Feynman diagrams involving gravitons suppress graviton and matter vacuum fluctuation loops by introducing a low-energy gravitational scale, ΛGvac < 2.4× 10−3 eV. Gravitons coupled to non-vacuum matter loops and matter tree graphs are controlled by a vertex form...
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Abstract A nonlocal quantum gravity theory is presented which is finite and unitary to all orders of perturbation theory. Vertex form factors in Feynman diagrams involving gravitons suppress graviton and matter vacuum fluctuation loops by introducing a low-energy gravitational scale, ΛGvac < 2.4×10 eV. Gravitons coupled to non-vacuum matter loops and matter tree graphs are controlled by a verte...
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ژورنال
عنوان ژورنال: International Journal of Modern Physics D
سال: 2015
ISSN: 0218-2718,1793-6594
DOI: 10.1142/s0218271815440113