ABSTRACT: We establish quantum circuit complexity as a fundamental physical observable and prove that it satisfies an uncertainty relation with energy, analogous to Heisenberg’s canonical uncertainty ...

Credit: CASC HELSINKI — A Chinese space company is setting its sights on crewed orbital spaceflight, marking a new step in the expansion of China’s commercial space sector. Zhang Xiaomin ...

Dextromethorphan is available as the brand-name drugs Robitussin and Delsym. An interaction can occur because one substance causes another substance to have a different effect than expected.