Page "Zero-point energy" Paragraph 6

Then in 1913, using this formula as a basis, Albert Einstein and Otto Stern published a paper of great significance in which they suggested for the first time the existence of a residual energy that all oscillators have at absolute zero.

They called this residual energy Nullpunktsenergie ( German ), later translated as zero-point energy.

They carried out an analysis of the specific heat of hydrogen gas at low temperature, and concluded that the data are best represented if the vibrational energy is