Heidelberg 2015 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 23: Ultra-cold atoms, ions and BEC IV (with Q)

A 23.2: Vortrag

Mittwoch, 25. März 2015, 14:45–15:00, C/HSW

Creation and Characterization of Quantum Synchronization in Trapped Ion Phonon-Lasers — Michael Hush, •Weibin Li, Sam Genway, Igor Lesanovsky, and Andrew Armour — School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD, United Kingdom

We investigate quantum synchronization theoretically in a system consisting of two cold ions in microtraps. The ions' motion is damped by a standing-wave laser whilst also being driven by a blue-detuned laser which results in self-oscillation. Working in a non-classical regime, where these oscillations contain only a few phonons and have a sub-Poissonian number variance, we explore how synchronization occurs when the two ions are weakly coupled using a probability distribution for the relative phase. We show that strong correlations arise between the spin and vibrational degrees of freedom within each ion and find that when two ions synchronize their spin degrees of freedom in turn become correlated. This allows one to indirectly infer the presence of synchronization by measuring the ions' internal state.