Zobrazeno 1 - 10
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pro vyhledávání: '"Wetterich, C."'
Autor:
Wetterich, C.
This work discusses simple examples how quantum systems are obtained as subsystems of classical statistical systems. For a single qubit with arbitrary Hamiltonian and for the quantum particle in a harmonic potential we provide explicitly all steps ho
Externí odkaz:
http://arxiv.org/abs/2408.06379
Autor:
Kreuzkamp, A., Wetterich, C.
Probabilistic cellular automata with deterministic updating are quantum systems. We employ the quantum formalism for an investigation of random probabilistic cellular automata, which start with a probability distribution over initial configurations.
Externí odkaz:
http://arxiv.org/abs/2405.09829
Autor:
Wetterich, C.
We adapt the precise definition of the flowing effective action in order to obtain a functional flow equation with simple properties close to physical intuition. The simplified flow equation is invariant under local gauge transformations and suitable
Externí odkaz:
http://arxiv.org/abs/2403.17523
Autor:
Wetterich, C.
Field transformations for the quantum effective action lead to different pictures of a given physical situation, as describing a given evolution of the universe by different geometries. Field transformations for functional flow equations can reveal i
Externí odkaz:
http://arxiv.org/abs/2402.04679
Autor:
Wetterich, C.
We propose that a quantum particle in a potential in one space dimension can be described by a probabilistic cellular automaton. While the simple updating rule of the automaton is deterministic, the probabilistic description is introduced by a probab
Externí odkaz:
http://arxiv.org/abs/2211.17034
Autor:
Wetterich, C.
Certain fermionic quantum field theories are equivalent to probabilistic cellular automata, with fermionic occupation numbers associated to bits. We construct an automaton that represents a discrete model of spinor gravity in four dimensions. Local L
Externí odkaz:
http://arxiv.org/abs/2211.09002
Autor:
Wetterich, C.
We discuss predictions for cosmology which result from the scaling solution of functional flow equations for a quantum field theory of gravity. A scaling solution is necessary to render quantum gravity renormalizable. Our scaling solution is directly
Externí odkaz:
http://arxiv.org/abs/2211.03596
Autor:
Rubakov, V. A., Wetterich, C.
The geometric concept of geodesic completeness depends on the choice of the metric field or "metric frame". We develop a frame-invariant concept of "generalised geodesic completeness" or "time completeness". It is based on the notion of physical time
Externí odkaz:
http://arxiv.org/abs/2210.11198
Autor:
Wetterich, C.
Quantum gravity can determine the dependence of gauge couplings in a scalar field, which is related to possible fifth forces and time varying fundamental "constants". This prediction is based on the scaling solution of functional flow equations. For
Externí odkaz:
http://arxiv.org/abs/2205.07029
Autor:
Wetterich, C.
How do cellular automata behave in the limit of a very large number of cells? Is there a continuum limit with simple properties? We attack this problem by mapping certain classes of automata to quantum field theories for which powerful methods exist
Externí odkaz:
http://arxiv.org/abs/2203.14081