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1997[X]
21Author    K. S. Viswanathan, R. ParthasarathyRequires 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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 TEI-XML for    default:Reihe_A/52/ZNA-1997-52a-0097.pdf 
 Identifier    ZNA-1997-52a-0097 
 Volume    52 
22Author    W. Becker, S. Long, J. K. MclverRequires cookie*
 Title    Nonperturbative Behavior of Higher-Harmonic Production in a Model Atom  
 Abstract    The emission of very high harmonics of a laser field irradiating a model atom defined by a three-dimensional delta function is considered and several nonperturbative features of the harmonic spectrum are discussed. 
  Reference    Z. Naturforsch. 52a, 105—107 (1997) 
  Published    1997 
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 TEI-XML for    default:Reihe_A/52/ZNA-1997-52a-0105.pdf 
 Identifier    ZNA-1997-52a-0105 
 Volume    52 
23Author    TrumanD. Black, DonA. LarsonRequires 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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 TEI-XML for    default:Reihe_A/52/ZNA-1997-52a-0108.pdf 
 Identifier    ZNA-1997-52a-0108 
 Volume    52 
24Author    E. J. Bochove, G. T. Moore, M. O. ScullyRequires cookie*
 Title    Energy Gain, Stability, and Bunching in Gas-Loaded Hermite-Gaussian Laser Linac  
 Abstract    Gas-loaded Hermite-Gaussian laser linacs yield greater gain and interaction lengths then vacuum linacs, however, optical beam and drift tube damage are not adequately alleviated in uniformly loaded devices. These problems can be resolved if the loading is graded so as to accommodate the phase velocity variation of the laser beam. 
  Reference    Z. Naturforsch. 52a, 111—113 (1997) 
  Published    1997 
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 TEI-XML for    default:Reihe_A/52/ZNA-1997-52a-0111.pdf 
 Identifier    ZNA-1997-52a-0111 
 Volume    52 
25Author    C. H. Keitel, H. M. Doss, M. Fleischhauer, L. M. Narducci, M. O. Scully, Shi-Yao ZhuRequires cookie*
 Title    The Dressed State Picture in Quantum Coherence and Interference  
 Abstract    We investigate the advantageous description of driven multi-level systems in the dressed state representation. A demonstration is given for the cases of subnatural line narrowing and lasing without inversion. 
  Reference    Z. Naturforsch. 52a, 114—116 (1997) 
  Published    1997 
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 TEI-XML for    default:Reihe_A/52/ZNA-1997-52a-0114.pdf 
 Identifier    ZNA-1997-52a-0114 
 Volume    52 
26Author    G. Moore, E. Bochove, M. O. ScullyRequires 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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 TEI-XML for    default:Reihe_A/52/ZNA-1997-52a-0117.pdf 
 Identifier    ZNA-1997-52a-0117 
 Volume    52 
27Author    M. O. Scully, Shi-Yao ZhuRequires cookie*
 Title    Sudarshan-Glauber P, £), and Wigner W Distributions in Correlated-Spontaneous-Emission Lasers  
 Abstract    A comparative study of Sudarshan-Glauber P, Q and Wigner ^distributions in correlated-spon-taneous-emission lasers has been made. Immediately giving the information of squeezing by exam-ining the diffusion coefficients is the advantage of the Sudarshan-Glauber P representation. 
  Reference    Z. Naturforsch. 52a, 120—122 (1997) 
  Published    1997 
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 TEI-XML for    default:Reihe_A/52/ZNA-1997-52a-0120.pdf 
 Identifier    ZNA-1997-52a-0120 
 Volume    52 
28Author    M. G. RaizenRequires 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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 TEI-XML for    default:Reihe_A/52/ZNA-1997-52a-0123.pdf 
 Identifier    ZNA-1997-52a-0123 
 Volume    52 
29Author    S. K. SrinivasanRequires cookie*
 Title    Squeezing of Light within the Framework of Population Theoretic Approach  
 Abstract    A multiphase approach for the population model of photons is proposed and it is shown that number squeezed coherent light as well as thermal light can be accomodated. It is also shown that the multiphase approach is a very natural way of describing non-Markov nature of the evolution of the density matrix. 
  Reference    Z. Naturforsch. 52a, 124—126 (1997) 
  Published    1997 
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 TEI-XML for    default:Reihe_A/52/ZNA-1997-52a-0124.pdf 
 Identifier    ZNA-1997-52a-0124 
 Volume    52 
30Author    Chang Su, A. A. Rangwala, K. WódkiewiczRequires 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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 TEI-XML for    default:Reihe_A/52/ZNA-1997-52a-0127.pdf 
 Identifier    ZNA-1997-52a-0127 
 Volume    52 
31Author    RussellG. Torti, JamesC. CouchmanRequires 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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 TEI-XML for    default:Reihe_A/52/ZNA-1997-52a-0130.pdf 
 Identifier    ZNA-1997-52a-0130 
 Volume    52 
32Author    S. K. BoseRequires 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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 TEI-XML for    default:Reihe_A/52/ZNA-1997-52a-0133.pdf 
 Identifier    ZNA-1997-52a-0133 
 Volume    52 
33Author    G. BhamathiRequires 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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 TEI-XML for    default:Reihe_A/52/ZNA-1997-52a-0137.pdf 
 Identifier    ZNA-1997-52a-0137 
 Volume    52 
34Author    CharlesB. Chiu, E.C G Sudarshan, G. BhamathiRequires 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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 TEI-XML for    default:Reihe_A/52/ZNA-1997-52a-0140.pdf 
 Identifier    ZNA-1997-52a-0140 
 Volume    52 
35Author    Ngee-Pong ChangRequires cookie*
 Title    Broken Chiral Symmetry in Hot QCD: The Pion Halo  
 Abstract    The massless pion propagates in hot medium with an exponentially damped halo. 
  Reference    Z. Naturforsch. 52a, 143—146 (1997) 
  Published    1997 
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 TEI-XML for    default:Reihe_A/52/ZNA-1997-52a-0143.pdf 
 Identifier    ZNA-1997-52a-0143 
 Volume    52 
36Author    C. Cronström, PremP. Srivastava, K. TanakaRequires 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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 TEI-XML for    default:Reihe_A/52/ZNA-1997-52a-0147.pdf 
 Identifier    ZNA-1997-52a-0147 
 Volume    52 
37Author    FrederickJ. GilmanRequires 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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 TEI-XML for    default:Reihe_A/52/ZNA-1997-52a-0149.pdf 
 Identifier    ZNA-1997-52a-0149 
 Volume    52 
38Author    C. R. HägenRequires 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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 TEI-XML for    default:Reihe_A/52/ZNA-1997-52a-0155.pdf 
 Identifier    ZNA-1997-52a-0155 
 Volume    52 
39Author    P. D. MorleyRequires 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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 TEI-XML for    default:Reihe_A/52/ZNA-1997-52a-0157.pdf 
 Identifier    ZNA-1997-52a-0157 
 Volume    52 
40Author    Yuval Ne, Eman Wolfson, Chair Extraordinary, Raymond, Beverly SacklerRequires 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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 TEI-XML for    default:Reihe_A/52/ZNA-1997-52a-0160.pdf 
 Identifier    ZNA-1997-52a-0160 
 Volume    52 
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