NIST team builds hybrid quantum system by entangling molecule with atom  May 20, 2020
Building on the their 2017 demonstration of quantum control of a molecule, a team of researchers in the US (NIST, University of Colorado) successfully entangled two energy levels of a calcium atomic ion with two different pairs of rotational states of a calcium hydride molecular ion, which is a calcium ion bonded to a hydrogen atom. The molecular qubit had a transition frequency—the speed of cycling between two rotational states—of either low energy at 13.4 kilohertz (kHz, thousands of cycles per second) or high energy at 855 billion cycles per second (gigahertz or GHz). Molecules could therefore act as mediators in quantum systems by converting quantum information across a wide range of qubit frequencies ranging from a few thousand to a few trillion cycles per second. With vibration, molecules could offer even higher qubit frequencies. The method of quantum control and measurement of molecules could find applications in quantum information science, quantum sensors, fundamental and applied physics, and controlled quantum chemistry…read more. TECHNICAL ARTICLE

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