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James Maldaner

Publications and source records attributed to James Maldaner.

2 recordsLinked to original sources
arXiv2025

Test of Quantum Gravity in Optical Magnetometers

In this work, quantum gravity effects, which can potentially be measured in magnetometers through the Larmor frequency of atoms in an external magnetic field, are estimated. It is shown that the thermal motion of atoms can, in principle, produce measurable quantum gravity effects, given the precision of modern magnetometers. If the particle velocities are caused by some other mechanism, such as convection, it is shown that the quantum gravity effects may be observed with the magnetometer's proposed detection threshold. An actual state-of-the-art optical magnetometer experiment is being designed to search for these effects and is described in a companion paper by Maldaner et al. (2023) [1].

gr-qc↗
arXiv2024

Feasibility analysis of a proposed test of quantum gravity via novel optical magnetometry in xenon

We present an analysis of the sensitivity limits of a proposed experimental search for quantum gravity, using a novel approach based on optical magnetometry in the noble gas isotope $^{129}$Xe. The analysis relies on a general uncertainty principle model that is consistent with most formulations of quantum gravity theory, where the canonical uncertainty relations are modified by a leading-order correction term that is linear in momentum. In turn, this correction modifies the magnetic moment of the spin-polarized $^{129}$Xe atoms that are immersed in a magnetic field in the proposed experiment, which results in a velocity-dependent variation of their Larmour frequency, that is detected via two-photon laser spectroscopy. The thermal distribution of atomic velocities, in conjunction with the Doppler effect, is used to scan the interrogating laser over different atomic velocities, and search for a corresponding variation in their Larmor frequencies. We show that the existing bounds on the leading-order quantum gravity correction can be improved by $10^{7}$ with existing technology, where another factor of $10^{2}$ is possible with near-future technical capabilities.

cond-mat.quant-gas↗