Work

Reconstructing the phonon distribution of trapped ions out of the Lamb-Dicke regime

Year: 2026

Type: preprint

Abstract: Characterizing the phonon distribution of trapped-ion motional states is essential for many applications in quantum information processing, but existing methods become ill-conditioned beyond the Lamb-Dicke regime. We overcome this limitation by recasting phonon-state reconstruction as a filter-function inversion problem. Using composite pulses on the carrier and multiple sidebands, we engineer well-conditioned filters in phonon space to characterize pure and mixed states, study heating dynamics, and reconstruct Fock states up to $n=250$.

Source: arXiv (Cornell University)

DOI: 10.48550/arxiv.2609.24147

Authors: Valahu, Christophe H., Nagpal, Prachi, Chalermpusitarak, Teerawat, Millican, Maverick J., McGarry, Cameron, Scuccimarra, Frank, Matsos, Vassili G., Chan, Hon-Kwan, Tan, Ting Rei

Institution: The University of Sydney

Language: English

Topic: Quantum Information and Cryptography

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W7214058301

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