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arXiv:2106.12939 · PRX Quantum

Certifying Multilevel Coherence in the Motional State of a Trapped Ion

Ollie Corfield, Jake Lishman, Chungsun Lee, Jacopo Mosca Toba, George Porter, Johannes Heinrich, S. C. Webster, Florian Mintert, Richard Claude Thompson

Published Dec 27, 2021• 3 citations
arXivHTMLPDF

Abstract

A scheme based on an interference pattern is used to experimentally certify the existence of multiple superposition elements in the motional state of a single ion, without risking false positives from imperfect operations.
DOI
10.1103/prxquantum.2.040359

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A scheme is presented for the generation of macroscopic quantum-interference states for the motion of a trapped ion. In the scheme the ion is driven by a standing-wave laser beam whose carrier frequency is tuned to the ion transition. The distinct feature of the scheme is that the time required to generate the desired state is limited only by the available laser intensity, not by inherent mechanisms such as off-resonant excitations. Therefore, our scheme may allow the generation of the desired state at a high speed, which is important in view of decoherence. In the two-dimension case, entangled coherent states can be obtained. The scheme can also be used to generate entangled states for multiple modes of NNN trapped ions with a single strong standing-wave laser pulse.