Macroscopic quantum superpositions in highly-excited strongly-interacting many-body systems

Abstract

We demonstrate a break-down in the macroscopic (classical-like) dynamics of wave-packets in complex microscopic and mesoscopic collisions. This break-down manifests itself in coherent superpositions of the rotating clockwise and anticlockwise wave-packets in the regime of strongly overlapping many-body resonances of the highly-excited intermediate complex. These superpositions involve $\sim 10^4$ many-body configurations so that their internal interactive complexity dramatically exceeds all of those previously discussed and experimentally realized. The interference fringes persist over a time-interval much longer than the energy relaxation-redistribution time due to the anomalously slow phase randomization (dephasing). Experimental verification of the effect is proposed.

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References in corpus (3)

• Random Matrix Theories in Quantum Physics: Common Concepts
• Measurements of Relative Phase in Binary Mixtures of Bose-Einstein Condensates
• Invariant Manifolds and Collective Coordinates

Cited by in corpus (5)

• Random Matrix Ensembles For Many-Body Quantum Systems
• Effect of phase relaxation on quantum superpositions in complex collisions
• Effect of a finite-time resolution on Schrödinger Cat States in complex collisions
• Quantum-classical transition for an analog of double-slit experiment in complex collisions: Dynamical decoherence in quantum many-body systems
• Anomalously Slow Cross Symmetry Phase Relaxation, Thermalized Non-Equilibrated Matter and Quantum Computing Beyond the Quantum Chaos Border