Abstract
There has been considerable speculation about the possibility that solid 4He can exist in a Bose condensed state closely analogous to the ordered state of superfluid 4He. Extending the arguments of Chester, Penrose, and Onsager, we have made quantitative predictions of the λ anomaly in the solid phase. We predict a critical temperature T c ~ 10−2 K near melting (falling off rapidly with increasing pressure). Experimental implications are briefly discussed.
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Widom, A., Locke, D.P. Bose-Einstein condensation in solid 4He. J Low Temp Phys 23, 335–343 (1976). https://doi.org/10.1007/BF00116924
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DOI: https://doi.org/10.1007/BF00116924