Abstract
This article reviews recent developments in tests of fundamental physics using atoms and molecules, including the subjects of parity violation, searches for permanent electric dipole moments, tests of the CPT theorem and Lorentz symmetry, searches for spatiotemporal variation of fundamental constants, tests of quantum electrodynamics, tests of general relativity and the equivalence principle, searches for dark matter, dark energy and extra forces, and tests of the spin-statistics theorem. Key results are presented in the context of potential new physics and in the broader context of similar investigations in other fields. Ongoing and future experiments of the next decade are discussed.
Highlights
Considering the vast theoretical jungle filled with hypothetical new particles possessing unknown properties outlined in Sec
The effect of B in turn generates a “compensating” field Bcomp ≈ −B within the shielded region, cancelling the observable effects of the hidden-photon field (Chaudhuri et al, 2015; Jackson Kimball et al, 2016a). This shielding suppression is on top of the small mixing parameter κ. Even this brief survey portrays a compelling case for experimental searches for exotic spin-dependent interactions
Such interactions are a ubiquitous feature of theoretical extensions to the standard model and general relativity, and are intimately connected to the mysteries of dark energy, dark matter, the strong conjugation and parity (CP) problem, and even the hierarchy problem and grand unification
Summary
The past two decades have been a transformational era for atomic, molecular and optical (AMO) physics, due to extraordinary accomplishments in the control of matter and light. Revolutionary developments on several fronts have been made possible by these advances, aided by improvements in precision time and frequency metrology, measurement techniques such as atomic magnetometry and interferometry, and firstprinciples atomic and molecular theory. These advances brought forth a plethora of new AMO applications, including novel tests of the fundamental laws of physics
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