Semi-classical wormholes are unstable

Spinning ring wormholes: a classical model for elementary particles?

Static horizonless solutions to the Einstein–Maxwell field equations, with only a circular cosmic string singularity, are extended to exact rotating asymptotically flat solutions. The possible interpretation of these field configurations as spinning elementary particles or as macroscopic rotating cosmic rings is discussed. Talk presented at the 4 Alexander Friedmann International Seminar on Gra...

Wormholes are Quantum Entangled Black Holes?

Semi-classical analysis

3 4 CONTENTS 2.2.2 The space of fixed vectors for a compact group is sym

Semi-classical signal analysis

This study introduces a new signal analysis method called SCSA, based on a semi-classical approach. The main idea in the SCSA is to interpret a pulse-shaped signal as a potential of a Schrödinger operator and then to use the discrete spectrum of this operator for the analysis of the signal. We present some numerical examples and the first results obtained with this method on the analysis of art...

Stable quantum computation of unstable classical chaos.

We show on the example of the Arnold cat map that classical chaotic systems can be simulated with exponential efficiency on a quantum computer. Although classical computer errors grow exponentially with time, the quantum algorithm with moderate imperfections is able to simulate accurately the unstable chaotic classical nonlinear dynamics for long times. The algorithm can be easily implemented o...