This package provides the preferred document class for papers to be submitted to “Quantum — the open journal of quantum science”. It is based on the widely used article document class and designed to allow a seamless transition from documents typeset with the article, revtex4-1, and elsarticle document classes. As a service to authors, the document class comes with a predefined bibilography style quantum.bst that is optimized to be used with the quantumarticle document class. Additionally, the quantumview documentclass is provided, which can be used as a proxy to typeset the HTML-only editorial pieces in Quantum Views in a LaTeX editor. The quantumarticle document class also offers an option to remove the Quantum-related branding. In that way, users appreciating the esthetics of this document class can use it for their notes as well.