Quantum Molar Density and Quantum Pascal

Project funded by Swedish Research Council (Project grant), grant 2020-05105_VR. Participating organisations named by the source: Umeå University. Funded amount: SEK 3,400,000, as stated by the source. Runs 2021-01-01 to 2024-12-31. Keywords: Naturvetenskap, Natural Sciences, Fysik, Physical Sciences, Atom- och molekylfysik och optik, Atom and Molecular Physics and Optics. Source: OpenAIRE Graph, from the funder's project data (collected by OpenAIRE on 2025-12-04); national funding data, not CORDIS. Abstract given by the source: Refractometry constitutes an optical technique for assessment of refractivity, n-1, that also can assess molar density and gas pressure with high precision and accuracy. It has been anticipated that it could be used for assessment of pressure with a huge dynamic range, 1 mPa - 10 Pa, and with a precision and accuracy of 1 and 10 ppm, respectively. However, this is far beyond what any existing instrumentation can achieve today. The reason is that conventional refractometry suffers from a number of limitations caused by fluctuations and drifts. To remedy this, we have developed a novel laser-based methodology, GAs MOdulation Refractometry (GAMOR), that can alleviate such limitations. It will be further developed so as to allow for the realization of instrumentation that can reach the aforementioned goals. To make this possible, novel modulation and characterization procedures will be developed that will eliminate the influence of pressure-induced cavity deformation that often is the limiting factor in conventional refractometry. This will allow for assessments solely limited by the accuracy of the molar polarizabilities of two gases (He and N2), which typically are in the low ppm range. This would make the systems calibration-free, which will open up for a number of applications, including serving as primary standards for both molar density and pressure, i.e. so as to realize both the “mol per cubic meter” (“Quantum Molar Density”) and the “Pascal” (“Quantum Pascal”) entities.

Original source.

Source: OpenAIRE Graph: projects of national funders, OpenAIRE, from the project data of Swedish Research Council. Retrieved 2026-10-28. Licence: Creative Commons Attribution 4.0 (OpenAIRE Graph). Selected metadata, adapted presentation; the publisher's record is authoritative. No endorsement by the source is implied. Licence: Creative Commons Attribution 4.0 (CC BY 4.0).

AI-assisted summary: The project "Quantum Molar Density and Quantum Pascal" is funded by the Swedish Research Council with a grant of SEK 3,400,000, running from January 1, 2021, to December 31, 2024, involving Umeå University. It focuses on developing a novel laser-based methodology for refractometry. Suggested technology pillar: sensing. Generated by AI from the public source text; it may contain errors and the original source is authoritative.