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Could dark energy be measured in the lab? | | Christian Beck
; Michael C. Mackey
; | | Date: |
23 Jun 2004 | | Journal: | Phys.Lett. B605 (2005) 295-300 | | Subject: | Astrophysics; Mesoscopic Systems and Quantum Hall Effect; Superconductivity | astro-ph cond-mat.mes-hall cond-mat.supr-con | | Abstract: | The experimentally measured spectral density of current noise in Josephson junctions provides direct evidence for the existence of zero-point fluctuations. Assuming that the total vacuum energy associated with these fluctuations cannot exceed the presently measured dark energy of the universe, we predict an upper cutoff frequency of nu_c=(1.69 +- 0.05) x 10^12 Hz for the measured frequency spectrum of zero-point fluctuations in the Josephson junction. The largest frequencies that have been reached in the experiments are of the same order of magnitude as nu_c and provide a lower bound on the dark energy density of the universe. It is shown that suppressed zero-point fluctuations above a given cutoff frequency can lead to 1/f noise. We propose an experiment which may help to measure some of the properties of dark energy in the lab. | | Source: | arXiv, astro-ph/0406504 | | Services: | Forum | Review | PDF | Favorites | |
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