| | 21 | Author
| K. S. Viswanathan, R. Parthasarathy | Requires cookie* | | | Title
| A Conformal Field Theory of Extrinsic Geometry of 2-d Surfaces  | | | | Abstract
| In the description of the extrinsic geometry of the string world sheet regarded as a conformal immersion of a 2-d surface in R 3 it was previously shown that, restricting to surfaces with h y Jg = 1, where h is the mean scalar curvature and g is the determinant of the induced metric on the surface, leads to Virasaro symmetry. An explicit form of the effective action on such surfaces is constructed in this article, which is the extrinsic curvature analog of the WZNW action. This action turns our to be the gauge invariant combination of the actions encountered in 2-d intrinsic gravity theory in light-cone gauge and the geometric action appearing in the quantization of the Virasaro group. This action, besides exhibiting Virasaro symmetry in z-sector, has SL (2, C) conserved currents in the z-sector. This allows us to quantize this theory in the z-sector along the lines of the WZNW model. The quantum theory on h ^/g = 1 surfaces in R 3 is shown to be in the same universality class as the intrinsic 2-d gravity theory. | | | |
Reference
| Z. Naturforsch. 52a, 97—104 (1997); received | | | |
Published
| 1997 | | | |
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| default:Reihe_A/52/ZNA-1997-52a-0097.pdf | | | | Identifier
| ZNA-1997-52a-0097 | | | | Volume
| 52 | |
| 23 | Author
| TrumanD. Black, DonA. Larson | Requires cookie* | | | Title
| Detection of Laser Induced Gratings via Acoustic Enhancement | | | | Abstract
| Using acoustic wave intermodulation, laser induced grating structures can be detected with enhanced sensitivity. Gratings with phase variations of the order of a few ^irad or displacement gratings of the order of 10 " 1 r m can be detected. The basic spatial frequency analysis explaining this detection enhancement is developed briefly in this paper. | | | |
Reference
| Z. Naturforsch. 52a, 108—110 (1997) | | | |
Published
| 1997 | | | |
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| default:Reihe_A/52/ZNA-1997-52a-0108.pdf | | | | Identifier
| ZNA-1997-52a-0108 | | | | Volume
| 52 | |
| 26 | Author
| G. Moore, E. Bochove, M. O. Scully | Requires cookie* | | | Title
| Laser Linac Using a Lens Waveguide in Vacuum | | | | Abstract
| Acceleration of a relativistic electron beam by the longitudinal field component of a focused laser or microwave beam is optimal when the laser beam is radially polarized. The electron energy gain between focusing optical lenses with an arbitrary optical mode cannot greatly exceed that available from a Gaussian beam of the same power. Off-axis transverse forces focus and recollimate appro-priately phased off-axis electrons over the acceleration length. | | | |
Reference
| Z. Naturforsch. 52a, 117—119 (1997) | | | |
Published
| 1997 | | | |
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| default:Reihe_A/52/ZNA-1997-52a-0117.pdf | | | | Identifier
| ZNA-1997-52a-0117 | | | | Volume
| 52 | |
| 28 | Author
| M. G. Raizen | Requires cookie* | | | Title
| Quantum Optics with Trapped Ions | | | | Abstract
| The ability to localize a small number of atoms, with each one moving much less than an optical wavelength (the Lamb-Dicke regime) is a prerequisite for a wide range of fundamental atom-field experiments. Recent developments in ion trapping technology, relevant to this goal, are discussed and some possible experimental directions are outlined. | | | |
Reference
| Z. Naturforsch. 52a, 123 (1997) | | | |
Published
| 1997 | | | |
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| default:Reihe_A/52/ZNA-1997-52a-0123.pdf | | | | Identifier
| ZNA-1997-52a-0123 | | | | Volume
| 52 | |
| 30 | Author
| Chang Su, A. A. Rangwala, K. Wódkiewicz | Requires cookie* | | | Title
| Laser-Phase-Noise-Induced Stochastic-Resonance Fluorescence | | | | Abstract
| Stochastic fluctuations of coherent and incoherent components of the resonance fluorescence intensity induced by Wiener-Levy laser phase noise are investigated. Statistical properties of the atomic dipole moment and stochastic Mollow spectra of atomic dipole fluctuations for different values of the laser linewidth and Rabi frequency are calculated. It is shown that these spectra exhibit a triplet structure which is purely classical and entirely laser-noise dependent. | | | |
Reference
| Z. Naturforsch. 52a, 127—129 (1997); received July 19 1996 | | | |
Published
| 1997 | | | |
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| default:Reihe_A/52/ZNA-1997-52a-0127.pdf | | | | Identifier
| ZNA-1997-52a-0127 | | | | Volume
| 52 | |
| 31 | Author
| RussellG. Torti, JamesC. Couchman | Requires cookie* | | | Title
| High Resolution Subwavelength Inspection Method for Measuring the Uniformity of Conducting Films | | | | Abstract
| A microwave adapter was fitted to a wax filled reducing wedge in order to transmit 8-12 GHz microwaves through a sub-wavelength rectangular opening. The configuration produced a 70 dB dynamic range and was found suitable for high resolution inspection of 1 to 10,000 ohm per square conducting films. Network analyzer measurements on 12 conducting films that were reported to be 5 to 1500 ohms per square are compared to the reported values and reconciled with electromagnetic theory. | | | |
Reference
| Z. Naturforsch. 52a, 130—132 (1997) | | | |
Published
| 1997 | | | |
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| default:Reihe_A/52/ZNA-1997-52a-0130.pdf | | | | Identifier
| ZNA-1997-52a-0130 | | | | Volume
| 52 | |
| 32 | Author
| S. K. Bose | Requires cookie* | | | Title
| The Structure of QCD Vacuum and Related Topics | | | | Abstract
| The structure of the vacuum and the attendant state-space for models with a spontaneous breakdown of a global U(l) symmetry is reviewed. QCD is examined in the light of this analysis. Certain commonly held views in QCD are found to need revision and rethinking. | | | |
Reference
| Z. Naturforsch. 52a, 133—136 (1997) | | | |
Published
| 1997 | | | |
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| default:Reihe_A/52/ZNA-1997-52a-0133.pdf | | | | Identifier
| ZNA-1997-52a-0133 | | | | Volume
| 52 | |
| 33 | Author
| G. Bhamathi | Requires cookie* | | | Title
| How Can We Find the Exotics? | | | | Abstract
| A search is proposed for dibaryonic systems with non-zero charm and beauty quantum numbers which are more suitable for unambiguous identification. An estimate of the production cross sections for the dibaryonic systems H c , H b and H bs is presented. | | | |
Reference
| Z. Naturforsch. 52a, 137—139 (1997) | | | |
Published
| 1997 | | | |
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| default:Reihe_A/52/ZNA-1997-52a-0137.pdf | | | | Identifier
| ZNA-1997-52a-0137 | | | | Volume
| 52 | |
| 34 | Author
| CharlesB. Chiu, E.C G Sudarshan, G. Bhamathi | Requires cookie* | | | Title
| Relativistic Hamiltonian Model for Higgs Resonance | | | | Abstract
| We construct a relativistic Hamiltonian model for Higgs resonance. Resonance trajectories are studied as a function of the parameters of the model. The possibility of a narrow width Higgs resonance in 1 TeV region cannot be ruled out from general considerations. Our model may serve as a phenomenological guide in the search for Higgs resonance. | | | |
Reference
| Z. Naturforsch. 52a, 140—142 (1997) | | | |
Published
| 1997 | | | |
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| default:Reihe_A/52/ZNA-1997-52a-0140.pdf | | | | Identifier
| ZNA-1997-52a-0140 | | | | Volume
| 52 | |
| 36 | Author
| C. Cronström, PremP. Srivastava, K. Tanaka | Requires cookie* | | | Title
| Self-Duality Condition and Critical Potentials | | | | Abstract
| It is shown that the self-duality constraint on the scalar field (combined with the equations of motion) by itself leads to the critical forms for the potential that minimizes the energy functional in the Chern-Simons-Higgs (CSH) system. If we have only the Chern-Simons (CS) term in the SL (2, R) gauge group one obtains a formalism that yields the equations of motion of a variety on non-linear models in two dimensions when the curvature is set equal to zero. | | | |
Reference
| Z. Naturforsch. 52a, 147—148 (1997) | | | |
Published
| 1997 | | | |
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| default:Reihe_A/52/ZNA-1997-52a-0147.pdf | | | | Identifier
| ZNA-1997-52a-0147 | | | | Volume
| 52 | |
| 37 | Author
| FrederickJ. Gilman | Requires cookie* | | | Title
| CP Violation | | | | Abstract
| The phenomenon of CP violation is examined, and predictions for its manifestations based on the three-generation Standard Model are reviewed. Applications to the K and B meson systems are emphasized. | | | |
Reference
| Z. Naturforsch. 52a, 149—154 (1997) | | | |
Published
| 1997 | | | |
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| default:Reihe_A/52/ZNA-1997-52a-0149.pdf | | | | Identifier
| ZNA-1997-52a-0149 | | | | Volume
| 52 | |
| 38 | Author
| C. R. Hägen | Requires cookie* | | | Title
| Whither the Anyon ? | | | | Abstract
| It is pointed out that Chern-Simons field theories do not always allow an interpretation in terms of anyons even in the nonrelativistic limit. Significantly, when the two approaches are found to differ the former is the one which is compatible with established physical principles. Thus the role left for the anyon is that of a very special subcase of Chern-Simons theories in the limit in which relativistic and spin considerations become irrelevant. | | | |
Reference
| Z. Naturforsch. 52a, 155—156 (1997) | | | |
Published
| 1997 | | | |
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| default:Reihe_A/52/ZNA-1997-52a-0155.pdf | | | | Identifier
| ZNA-1997-52a-0155 | | | | Volume
| 52 | |
| 39 | Author
| P. D. Morley | Requires cookie* | | | Title
| Production of Tauonic Uranium in e + -e Machines * * | | | | Abstract
| I discuss the production of tauonic uranium in e + -e~ machines. A suggested experimental arrangement is given which allows for future machine improvement. To obtain the energy levels to within 1% accuracy, the Dirac equation is solved using a radial uranium charge distribution. Finally, weak t capture P + t -* • N + v T in uranium is calculated. | | | |
Reference
| Z. Naturforsch. 52a, 157—159 (1997) | | | |
Published
| 1997 | | | |
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| default:Reihe_A/52/ZNA-1997-52a-0157.pdf | | | | Identifier
| ZNA-1997-52a-0157 | | | | Volume
| 52 | |
| 40 | Author
| Yuval Ne, Eman Wolfson, Chair Extraordinary, Raymond, Beverly Sackler | Requires cookie* | | | Title
| SU (2/1) as a Chiral Supersymmetry | | | | Abstract
| The Weinberg-Salam model is embedded in SU (2/1), thereby considerably reducing the arbitrari-ness in SU(2) and U(l) assignments for leptons and quarks. The grading of the matter fields corresponds to their chirality. The action of the odd generators of a superalgebra usually involves a change in the statistics of the states, in the representation carrier-space. We explain the interplay between chiralities and statistics. | | | |
Reference
| Z. Naturforsch. 52a, 160—162 (1997); received July 16 1996 | | | |
Published
| 1997 | | | |
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| default:Reihe_A/52/ZNA-1997-52a-0160.pdf | | | | Identifier
| ZNA-1997-52a-0160 | | | | Volume
| 52 | |
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