An Assessment of Four Divisions of the Physical Measurement Laboratory at the National Institute of Standards and Technology Fiscal Year 2018 (2018) / Chapter Skim
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6 Quantum Physics Division
6 Quantum Physics Division
Pages 40-46
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From page 40... ...
and testing fundamental high-energy physics with work to set limits on the electron electric dipole moment. The Rey Theory Group is driving a spectacular theoretical effort to understand quantum many-body effects in cold atom three-dimensional (3D)
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From page 41... ...
Examples of such problems tackled by the Rey Theory Group and its collaborators include, but are not limited to, quantum magnetism, the study of AMO analogs of systems where localized magnetic moments interact with one another or with mobile fermions, such as AMO analogs of the SU(N) lattice models;3 quantum systems and quantum engineering, the investigation of the behavior of open driven and interacting many-body systems, one of the frontiers of modern quantum physics; and cold molecule physics, a topic driven by and feeding into the experimental capability developed in the Ye Group to control experimentally the initial state of molecules, monitor how they approach each other and their intermediate states, and analyze the end products in a situation where the molecular reaction processes are essentially limited only by the laws of quantum mechanics.
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From page 42... ...
The Lehnert Laboratory works on a number of different topics, including the transduction of mechanical motion into electrical signals; development of Josephson parametric amplifiers from an arcane and poorly understood device to what is now a heavily used, quantum-limited amplifier central to superconducting qubit development; and, more recently, development of an optomechanical transducer connecting microwave and optical signals. Prior to starting this last effort, the group had led the first effort to successfully use light to cool a mechanical resonator to its quantum ground state, adapting the AMO technique of sideband cooling and applying it to a microwave system to achieve this result.7 The group's parametric amplifiers are being used in a collaborative effort involving Yale University, the University of California, Berkeley, and Lawrence Livermore National Laboratory to search for axions,8 which, if detected, would have very important implications for fundamental physics and searches for dark matter.
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From page 43... ...
The Nesbitt Laboratory performs experiments in the areas of biophysics, nanoscience, chemical physics, and molecular spectroscopy. One nanoscience project focuses on the fundamental nature of the quantum confined exciton state, and luminescence blinking, in single core/shell chemical quantum dots via their response to very high electric fields.
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From page 44... ...
Entangled twophoton absorption follows linear rather than the classical quadratic intensity dependence and can be observed at much lower photon fluxes than two-photon absorption in conventional multiphoton microscope. Accomplishments The use of single-molecule fluorescence resonance energy transfer spectroscopy in the presence of natural amino acids, both with (e.g., lysine, arginine)
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From page 45... ...
QPD/JILA maintains a strong electronics shop where students work with staff to build things, an excellent machine shop both at the professional level and for students, and a fantastic glass shop. It is extremely important that this range of facilities and support staff remain.
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From page 46... ...
The Perkins Laboratory has made dramatic improvements in AFM cantilever technology to achieve microsecond response times in AFM microscopes, which will have immediate and important use in the rapidly expanding AFM imaging world, both for materials sciences and biology. The Nesbitt Laboratory is expanding fluorescence resonance energy transfer (FRET)
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