Semiclassical methods for investigating open quantum systems and decoherence

Takeo Kamizawa

Kalle‐Antti Suominen

Christoph-Marian Goletz

In this work the semiclassical hybrid dynamics is extended in order to be capable of treating open quantum systems considering finite baths. The corresponding phenomena, i.e. decoherence and dissipation, are investigated for various scenarios.

Narayan Ganesan

Alexei D. Chepelianskii, Dima L. Shepelyansky

We present a quantum algorithm that allows one to simulate chaos-assisted tunneling in deep semiclassical regime on existing quantum computers. This opens additional possibilities for investigation of macroscopic quantum tunneling and realization of semiclassical Schr\"odinger cat oscillations [E. Schr\"odinger, Naturwissenschaften 32, 807 (1935)]. Our numerical studies determine the decoherence rate induced by noisy gates for these oscillations and propose a suitable parameter regime for their experimental implementation.

Vladimir Privman