This review considers the theoretical background of and experimental evidence for nonclassical phonon states and has as its primary goal the critical analysis of recent experiments in which squeezed and entangled phonons are created and probed. The quantum aspects of elastic deformation fields similar to nonclassical light fields are of interest for potential use in applied and fundamental research, including quantum computing and testing quantum-theoretical hypotheses.

PACS: 03.65.Ud, 42.50.Dv, 42.65.Lm, 71.36.+c, 78.47.J− (all) DOI: 10.3367/UFNe.0183.201309b.0917 URL: https://ufn.ru/en/articles/2013/9/b/ 000328748500002 2-s2.0-84890909808 2013PhyU...56..868M Citation: Misochko O V "Nonclassical states of lattice excitations: squeezed and entangled phonons" Phys. Usp. 56 868–882 (2013) BibTexBibNote ® (generic)BibNote ® (RIS)MedlineRefWorks Received: 27th, October 2012, revised: 24th, May 2013, accepted: 27th, May 2013 Оригинал: Мисочко О В «Неклассические состояния возбуждений кристаллической решётки: сжатые и запутанные фононы» УФН 183 917–933 (2013); DOI: 10.3367/UFNr.0183.201309b.0917