Multi-phonon relaxation and generation of quantum states in a nonlinear mechanical oscillator
Artikel i vetenskaplig tidskrift, 2013

The dissipative quantum dynamics of an anharmonic oscillator is investigated theoretically in the context of carbon-based nano-mechanical systems. In the short-time limit, it is known that macroscopic superposition states appear for such oscillators. In the long-time limit, single- and multi-phonon dissipation lead to decoherence of the non-classical states. However, at zero temperature, as a result of two-phonon losses the quantum oscillator eventually evolves into a non-classical steady state. The relaxation of this state due to thermal excitations and one-phonon losses is numerically and analytically studied. The possibility of verifying the occurrence of the non-classical state is investigated and signatures of the quantum features arising in a ring-down setup are presented. The feasibility of the verification scheme is discussed in the context of quantum nano-mechanical systems.

Författare

Aurora Voje

Chalmers, Teknisk fysik, Kondenserade materiens teori

Alexander Croy

Chalmers, Teknisk fysik, Kondenserade materiens teori

Andreas Isacsson

Chalmers, Teknisk fysik, Kondenserade materiens teori

New Journal of Physics

1367-2630 (ISSN)

Vol. 15 053041

Styrkeområden

Nanovetenskap och nanoteknik

Ämneskategorier

Annan teknik

Den kondenserade materiens fysik

DOI

10.1088/1367-2630/15/5/053041