Author
Herman Feshbach
Other affiliations: Istituto Nazionale di Fisica Nucleare, Los Alamos National Laboratory
Bio: Herman Feshbach is an academic researcher from Massachusetts Institute of Technology. The author has contributed to research in topics: Scattering & Elastic scattering. The author has an hindex of 36, co-authored 131 publications receiving 11837 citations. Previous affiliations of Herman Feshbach include Istituto Nazionale di Fisica Nucleare & Los Alamos National Laboratory.
Topics: Scattering, Elastic scattering, Nucleon, Inelastic scattering, Neutron
Papers published on a yearly basis
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TL;DR: In this article, it was shown that the first term of a series expansion of the differential radiation cross-section in the energy of the radiated quantum may be expressed in terms of the elastic scattering amplitudes at the incident and final energies.
82 citations
TL;DR: In this paper, the authors derived expressions very similar to the "Breit-Wigner" formulas for the scattering and absorption cross section of nuclear particles, e.g. neutrons, protons, etc.
Abstract: Expressions very similar to the "Breit-Wigner" formulas are derived for the scattering and absorption cross section of nuclear particles, e.g. neutrons, protons, etc. The resonance energies, particle widths and other characteristic features can be expressed in terms of the logarithmic derivative of the particle wave function at the nuclear surface. Simple assumptions about the behavior of the incident particle inside the nucleus are used to find approximate expressions for (1) the particle widths in terms of the level spacing; (2) the neutron scattering cross section near and between resonances; (3) the total cross section and the absorption cross section averaged over neighboring levels for neutron energies up to 1 Mev. These results are then compared with the experimental data and are found to be in qualitative agreement.
77 citations
TL;DR: In this article, the authors studied how nucleon-nucleon correlations influence high-energy scattering by nuclei and formulated the scattering problem in terms of an infinite system of coupled equations.
76 citations
TL;DR: In this paper, the two coupled channel formalism for high energy elastic scattering was extended to include spin and isospin effects for a spin and zero nucleus, which manifest themselves by additional spin-orbit terms in the potentials Explicit formulas for these potentials were obtained in terms of the fully spin and isotropin dependent nucleon-nucleon scattering amplitude, the ground state nuclear form factor and the state dependent correlation functions.
66 citations
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TL;DR: In this article, a review of recent experimental and theoretical progress concerning many-body phenomena in dilute, ultracold gases is presented, focusing on effects beyond standard weakcoupling descriptions, such as the Mott-Hubbard transition in optical lattices, strongly interacting gases in one and two dimensions, or lowest-Landau-level physics in quasi-two-dimensional gases in fast rotation.
Abstract: This paper reviews recent experimental and theoretical progress concerning many-body phenomena in dilute, ultracold gases. It focuses on effects beyond standard weak-coupling descriptions, such as the Mott-Hubbard transition in optical lattices, strongly interacting gases in one and two dimensions, or lowest-Landau-level physics in quasi-two-dimensional gases in fast rotation. Strong correlations in fermionic gases are discussed in optical lattices or near-Feshbach resonances in the BCS-BEC crossover.
6,601 citations
TL;DR: In this article, the present knowledge about point and line defects in graphene are reviewed and particular emphasis is put on the unique ability of graphene to reconstruct its lattice around intrinsic defects, leading to interesting effects and potential applications.
Abstract: Graphene is one of the most promising materials in nanotechnology. The electronic and mechanical properties of graphene samples with high perfection of the atomic lattice are outstanding, but structural defects, which may appear during growth or processing, deteriorate the performance of graphene-based devices. However, deviations from perfection can be useful in some applications, as they make it possible to tailor the local properties of graphene and to achieve new functionalities. In this article, the present knowledge about point and line defects in graphene are reviewed. Particular emphasis is put on the unique ability of graphene to reconstruct its lattice around intrinsic defects, leading to interesting effects and potential applications. Extrinsic defects such as foreign atoms which are of equally high importance for designing graphene-based devices with dedicated properties are also discussed.
2,828 citations
TL;DR: Feshbach resonances are the essential tool to control the interaction between atoms in ultracold quantum gases and have found numerous experimental applications, opening up the way to important breakthroughs as mentioned in this paper.
Abstract: Feshbach resonances are the essential tool to control the interaction between atoms in ultracold quantum gases. They have found numerous experimental applications, opening up the way to important breakthroughs. This review broadly covers the phenomenon of Feshbach resonances in ultracold gases and their main applications. This includes the theoretical background and models for the description of Feshbach resonances, the experimental methods to find and characterize the resonances, a discussion of the main properties of resonances in various atomic species and mixed atomic species systems, and an overview of key experiments with atomic Bose-Einstein condensates, degenerate Fermi gases, and ultracold molecules.
2,642 citations
TL;DR: In this paper, the authors introduce the concept of Fano resonances, which can be reduced to the interaction of a discrete (localized) state with a continuum of propagation modes, and explain their geometrical and/or dynamical origin.
Abstract: Modern nanotechnology allows one to scale down various important devices (sensors, chips, fibers, etc.) and thus opens up new horizons for their applications. The efficiency of most of them is based on fundamental physical phenomena, such as transport of wave excitations and resonances. Short propagation distances make phase-coherent processes of waves important. Often the scattering of waves involves propagation along different paths and, as a consequence, results in interference phenomena, where constructive interference corresponds to resonant enhancement and destructive interference to resonant suppression of the transmission. Recently, a variety of experimental and theoretical work has revealed such patterns in different physical settings. The purpose of this review is to relate resonant scattering to Fano resonances, known from atomic physics. One of the main features of the Fano resonance is its asymmetric line profile. The asymmetry originates from a close coexistence of resonant transmission and resonant reflection and can be reduced to the interaction of a discrete (localized) state with a continuum of propagation modes. The basic concepts of Fano resonances are introduced, their geometrical and/or dynamical origin are explained, and theoretical and experimental studies of light propagation in photonic devices, charge transport through quantum dots, plasmon scattering in Josephson-junction networks, and matter-wave scattering in ultracold atom systems, among others are reviewed.
2,520 citations