Comment on "Space-Time Crystals of Trapped Ions": And Yet it Moves Not !
Patrick Bruno
TL;DR
This comment critically examines the claims of space-time crystals in trapped ions, questioning the interpretation of experimental results and emphasizing the importance of clear definitions and criteria for identifying such phases.
Contribution
It provides a critical analysis of the original claims, clarifying conceptual misunderstandings and proposing more rigorous criteria for space-time crystal identification.
Findings
Highlights ambiguities in defining space-time crystals
Questions the experimental evidence for spontaneous symmetry breaking
Emphasizes the need for precise criteria in future research
Abstract
A Comment on "Space-Time Crystals of Trapped ions", by Tongcang Li et al. (PRL 109, 163001 (2012); arXiv:1206.4772
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