Stoppage of Light Made Flexible by an Additional Control Field

We show how the application of a coupling field connecting the two lower metastable states of a Lambda system facilitates stoppage of light in a coheren tly driven Doppler broadened atomic medium via electromagnetic induced transparencyComment: 11 pages, 3 figures, typed in Latex, Accepted in JM

Causality in Propagation of a Pulse in a Nonlinear Dispersive Medium

We investigate the causal propagation of the pulse through dispersive media by very precise numerical solution of the coupled Maxwell-Bloch equations without any approximations about the strength of the input field. We study full nonlinear behavior of the pulse propagation through solid state media like ruby and alexandrite. We have demonstrated that the information carried by the discontinuity, {\it i.e}, front of the pulse, moves inside the media with velocity $c$ even though the peak of the pulse can travel either with sub-luminal or with super-luminal velocity. We extend the argument of Levi-Civita to prove that the discontinuity would travel with velocity $c$ even in a nonlinear medium.Comment: 4 pages, 4 figures, 2 table

Internal Revenue Service Summonses for Sensitive Accountants\u27 Papers

Every modern public corporation has obligations of accountability and disclosure to the public and to its shareholders. These accepted duties of disclosure, however, become the source of conflicts when government agencies make unanticipated inquiries of accountants about otherwise private or background data concerning the corporations they audit. This is particularly true when a public corporation\u27s duties of financial accountability, which stem chiefly from securities law requirements and fiduciary duties,evoke the Internal Revenue Service\u27s interest in information that may reveal or be probative of the corporation\u27s tax liability. Most corporate taxpayers and their accountants understand and accept--if only reluctantly--their obligations to provide the Internal Revenue Service (IRS or Service) with relevant documents generated during everyday business activity. More recently, however,the complexity of financial accountability requirements has prompted some corporations to ask their independent accountants to prepare a set of sensitive 1 papers for the audit of the corporation\u27s financial statements. These papers, which the accountants and their client corporations originally did not intend for revenue agents to examine, have attracted the Service\u27s interest because of their potential impact on the corporation\u27s tax liability... This Article explores the IRS\u27 efforts to resolve the dispute in its favor, the availability of the summons power to obtain sensitive accountant work papers, the public policy controversy generated by the Service\u27s efforts, and the course that the debate is likely to take on these issues in the future... Part III of this Article explores the rationales underlying the accountants\u27 defenses and concludes that the courts should find them unpersuasive