The paper addresses counterintuitive behavior of electrons injected into dense cryogenic media with negative scattering length a0. Instead of the expected polaronic effect (formation of density enhancement clusters) which should substantially reduce the electron mobility, an opposite picture is observed: with increasing ∣a0∣ (the trend taking place for inert gases with the growth of atomic number) and the medium density, the electrons remain practically free. An explanation of this behavior is provided based on consistent accounting for the nonlinearity of electron interaction with the gaseous medium in the gas atom number density.The paper addresses counterintuitive behavior of electrons injected into dense cryogenic media with negative scattering length a0. Instead of the expected polaronic effect (formation of density enhancement clusters) which should substantially reduce the electron mobility, an opposite picture is observed: with increasing ∣a0∣ (the trend taking place for inert gases with the growth of atomic number) and the medium density, the electrons remain practically free. An explanation of this behavior is provided based on consistent accounting for the nonlinearity of electron interaction with the gaseous medium in the gas atom number density.

Low Temperature PhysicsApr 1, 20090 citations

Behavior of the Electron

ScienceDec 4, 19310 citations

Atomtronics: An ultracold analogue of semiconductor devices

Murray Holland, B. T. Seaman, M. Kraemer +1 more

A collection of ultracold atoms subject to a spatially periodic potential energy can exhibit behavior analogous to electrons in a crystal lattice. This fact was profoundly established by the demonstration of the superfluid to Mott-insulator transition of atoms in an optical lattice. An optical lattice consists of atoms subject to a periodic potential produced by interfering laser beams. The analogy between ultracold atoms in optical lattices and electrons in crystal lattices is manifestly a rich one. Recently, we have made a a proposal to extend the analogy to doped semiconductor materials. Lattice ”defects” achieve behaviors similar to P-type and N-type semiconductor materials. Naturally the interest is to adjoin P-type and N-type atoms lattices to produce an atom diode, and then an NPN or PNP lattice ”sandwich” to achieve bipolar transistor-like behavior for ultracold atoms. Such heterogeneous structures can indeed be made to mimic their electronic counterparts.A collection of ultracold atoms subject to a spatially periodic potential energy can exhibit behavior analogous to electrons in a crystal lattice. This fact was profoundly established by the demonstration of the superfluid to Mott-insulator transition of atoms in an optical lattice. An optical lattice consists of atoms subject to a periodic potential produced by interfering laser beams. The analogy between ultracold atoms in optical lattices and electrons in crystal lattices is manifestly a rich one. Recently, we have made a a proposal to extend the analogy to doped semiconductor materials. Lattice ”defects” achieve behaviors similar to P-type and N-type semiconductor materials. Naturally the interest is to adjoin P-type and N-type atoms lattices to produce an atom diode, and then an NPN or PNP lattice ”sandwich” to achieve bipolar transistor-like behavior for ultracold atoms. Such heterogeneous structures can indeed be made to mimic their electronic counterparts.

Frontiers in OpticsJan 1, 20060 citations

General Properties of the Electron

Harald Rose

Springer series in optical sciences/SPringer series in optical sciencesJan 1, 20120 citations

Studies of threshold behavior in electron-molecule collisions using ultra-high-n Rydberg atoms

M. T. Frey

Potassium atoms in selected high-lying Rydberg states (n $<$ 1200) are used as a tool to probe threshold behavior in electron-molecule collisions. Collisions with non-polar electron attaching molecules such as CCl $\\sb4$ are dominated by electron capture in a binary interaction between the Rydberg electron and target molecule allowing the study of electron attachment at electron energies of only a few $\\mu$ eV. Analysis of the data shows the cross section for electron capture is consistent with the Wigner threshold law for an inelastic s-wave process. Collisions with polar molecules can lead to Rydberg atom destruction through transfer of molecular rotational energy to the Rydberg electron. Rydberg atom data obtained with polar targets are not consistent with scattering from a static dipole. However, the data are consistent with a threshold law that takes into account a rotationally-averaged induced dipole interaction that can possibly support bound or virtual states.Potassium atoms in selected high-lying Rydberg states (n $<$ 1200) are used as a tool to probe threshold behavior in electron-molecule collisions. Collisions with non-polar electron attaching molecules such as CCl$\\sb4$ are dominated by electron capture in a binary interaction between the Rydberg electron and target molecule allowing the study of electron attachment at electron energies of only a few $\\mu$eV. Analysis of the data shows the cross section for electron capture is consistent with the Wigner threshold law for an inelastic s-wave process. Collisions with polar molecules can lead to Rydberg atom destruction through transfer of molecular rotational energy to the Rydberg electron. Rydberg atom data obtained with polar targets are not consistent with scattering from a static dipole. However, the data are consistent with a threshold law that takes into account a rotationally-averaged induced dipole interaction that can possibly support bound or virtual states.

Jan 1, 19950 citations

Potassium atoms in selected high-lying Rydberg states (n

<

1200) are used as a tool to probe threshold behavior in electron-molecule collisions. Collisions with non-polar electron attaching molecules such as CCl

\\sb4

are dominated by electron capture in a binary interaction between the Rydberg electron and target molecule allowing the study of electron attachment at electron energies of only a few

\\mu

eV. Analysis of the data shows the cross section for electron capture is consistent with the Wigner threshold law for an inelastic s-wave process. Collisions with polar molecules can lead to Rydberg atom destruction through transfer of molecular rotational energy to the Rydberg electron. Rydberg atom data obtained with polar targets are not consistent with scattering from a static dipole. However, the data are consistent with a threshold law that takes into account a rotationally-averaged induced dipole interaction that can possibly support bound or virtual states.