V. V. Flambaum

Enhanced effects of variation of the fundamental constants in laser interferometers and application to dark matter detection

We outline laser interferometer measurements to search for variation of the electromagnetic fine-structure constant

Further evidence for cosmological evolution of the fine structure constant

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Search for time variation of the fine structure constant

and particle masses (including a nonzero photon mass). We propose a strontium optical lattice clock---silicon single-crystal cavity interferometer as a small-scale platform for these measurements. Our proposed laser interferometer measurements, which may also be performed with large-scale gravitational-wave detectors, such as LIGO, Virgo, GEO600, or TAMA300, may be implemented as an extremely precise tool in the direct detection of scalar dark matter that forms an oscillating classical field or topological defects.

Further evidence for a variable fine‐structure constant from Keck/HIRES QSO absorption spectra

We describe the results of a search for time variability of the fine structure constant alpha using absorption systems in the spectra of distant quasars. Three large optical data sets and two 21 cm and mm absorption systems provide four independent samples, spanning approximately 23% to 87% of the age of the universe. Each sample yields a smaller alpha in the past and the optical sample shows a 4 sigma deviation: Delta alpha/alpha = -0.72+/-0.18 x 10(-5) over the redshift range 0.5<z<3.5. We find no systematic effects which can explain our results. The only potentially significant systematic effects push Delta alpha/alpha towards positive values; i.e., our results would become more significant were we to correct for them.

Indications of a spatial variation of the fine structure constant.

An order of magnitude sensitivity gain is described for using quasar spectra to investigate possible time or space variation in the fine structure constant

Possible evidence for a variable fine-structure constant from QSO absorption lines: motivations, analysis and results

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Violations of fundamental symmetries in atoms and tests of unification theories of elementary particles

. Applied to a sample of 30 absorption systems, spanning redshifts

New limits on coupling of fundamental constants to gravity using 87Sr optical lattice clocks.

0.5lzl1.6

Enhanced Sensitivity to the Time Variation of the Fine-Structure Constant and mp=me in Diatomic Molecules

, we derive limits on variations in

Single-ion nuclear clock for metrology at the 19th decimal place.

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