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

S. Yu. Kun·L. Benet·L. T. Chadderton·W. Greiner·F. Haas
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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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S. Yu. Kun, L. Benet, L. T. Chadderton, W. Greiner, F. Haas. 2003-02-05. Macroscopic quantum superpositions in highly-excited strongly-interacting many-body systems. https://doi.org/10.1103/physrevc.67.011604

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