Pursuing a Master’s in Quantum Mechanics (QM) after a major in Mechanical Engineering with physics electives can be feasible, but it requires careful planning. Most MS and PhD programs in physics necessitate passing qualifying exams in core areas, including thermodynamics, electromagnetic field theory, classical mechanics, and quantum mechanics. Typically, students must complete a series of foundational courses in these subjects during their first year, followed by advanced courses in QM and a thesis in the second year. Some programs offer flexibility, allowing students to take a broader range of electives or even pursue a part-time option focused on QM courses over an extended period. However, success in this path depends on passing the qualifying exams and managing course loads effectively. The discussion primarily reflects the structure of U.S. university programs, and applicability may vary in other countries.