Zero-Point Energy: The Case of the Leiden Low-Temperature Laboratory of Heike Kamerlingh Onnes

Delft, Dirk van

doi:10.1080/00033790701780303

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2011

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“…In 1919 Elmer Imes at the University of Michigan published precision experiments on the absorption of HCl and HBr that 40 For a survey of zero-point energy in Leiden, seevan Delft (2007, pp. 484-493) andvan Delft (2008).…”

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confidence: 99%

Preludes to dark energy: zero-point energy and vacuum speculations

Kragh

2011

Arch. Hist. Exact Sci.

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According to modern physics and cosmology, the universe expands at an increasing rate as the result of a "dark energy" that characterizes empty space. Although dark energy is a modern concept, some elements in it can be traced back to the early part of the twentieth century. This paper examines the origin of the idea of zero-point energy and in particular how it appeared in a cosmological context in a hypothesis proposed by Walther Nernst in 1916. The hypothesis of a zero-point vacuum energy attracted some attention in the 1920s, but without attempts to relate it to the cosmological constant that was discussed by Georges Lemaître in particular. Only in the late 1960s was it recognized that there is a connection between the cosmological constant and the quantum vacuum.As seen in retrospect, many of the steps that eventually led to the insight of a kind of dark energy occurred isolated and uncoordinated. Content

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confidence: 99%