Comments on "Vortex Glass and Lattice Melting Transitions in a YNi_2B_2C Single Crystal"

Recently, Mun et.al. (Phys. Rev. Lett., 76, 2790 (1996)) have published their results on single crystal YNi_2B_2C, claiming that their experimental observations can be explained in terms of formation of Vortex Glass and Lattice melting. Our experiments, carried out on samples obtained from the SAME source, reveal a much richer phase diagram and span wider regions of experimental parameter space than Mun et. al. that encompasses most of their observations. We speculate that this material has anomalous intrinsic properties and the results cannot be explained by simple models about the flux lattice.Comment: 1 page, LaTeX type, 1 PostScript figure, Uses PRABIB.STY file, 600 dpi PS file available at http://sagar.physics.neu.edu/preprints.html To appear in Physical Review Letter

ASSESSMENT OF EDUCATIONAL INTERVENTION ON KNOWLEDGE, ATTITUDE, AND PRACTICES OF RURAL COMMUNITY PHARMACISTS OF MYSURU DISTRICT TOWARD ADVERSE DRUG REACTION REPORTING

Objective: A prospective interventional study was conducted to evaluate the impact of educational intervention on knowledge, attitude, and practices (KAP)(of rural community pharmacists toward adverse drug reaction (ADR) reporting.Methods: A validated KAP questionnaire was administered on the enrolled community pharmacists in the study. SPSS software package version-19 was used to calculate the influence of educational intervention on KAP scores of the participants. Pre-training KAP scores were compared with the post-training KAP scores.Results: About 49 community pharmacists have participated in the study, 95.91% (n=47) were males, and 4.08% (n=2) were females. The mean±SD age of the participants was 40.93±7.84 years. The mean ± SD score in the knowledge component was significantly increased from 4.87±2.015 to 7.09 ± 0.68 (n=49, p<0.05). After the educational intervention, 77.55% (n=38) of participants could correctly define the ADRs, and 73.46% (n=36) of participants were aware of the consequence of ADRs. About 57.34% of participants disagree with the statement reporting of ADRs incurs the addtional workload with post education intervention. At the end of the study, the participants' knowledge was significantly increased and participant pharmacists felt responsible toward ADR reporting.Conclusion: Educational interventional program have shown a tremendous change in knowledge and awareness of the respondents towards adverse drug reaction monitoring and reporting. It is well understood that there is a need for promoting the pharmacovigilance activities among community pharmacists

The squeezed generalized amplitude damping channel

Squeezing of a thermal bath introduces new features absent in an open quantum system interacting with an uncorrelated (zero squeezing) thermal bath. The resulting dynamics, governed by a Lindblad-type evolution, extends the concept of a generalized amplitude damping channel, which corresponds to a dissipative interaction with a purely thermal bath. Here we present the Kraus representation of this map, which we call the squeezed generalized amplitude damping channel. As an application of this channel to quantum information, we study the classical capacity of this channel.Comment: Accepted for publication in Physical Review A; note on methods of generating bath squeezing added in Section II A; 12 pages, 7 figure

Bilarge neutrino mixing from supersymmetry with high-scale nonrenormalizable interactions

We suggest a supersymmetric (SUSY) explanation of neutrino masses and mixing, where nonrenormalizable interactions in the hidden sector generate lepton number violating Majorana mass terms for both right-chiral sneutrinos and neutrinos. It is found necessary to start with a superpotential including an array of gauge singlet chiral superfields. This leads to nondiagonal $\Delta L = 2$ mass terms and almost diagonal SUSY breaking $A$-terms. As a result, the observed pattern of bilarge mixing can be naturally explained by the simultaneous existence of the seesaw mechanism and radiatively induced masses. Allowed ranges of parameters in the gauge singlet sector are delineated, corresponding to each of the cases of normal hierarchy, inverted hierarchy and degenerate neutrinos.Comment: 19 pages, 5 figures. Minor modifications are made in the title and the text, some new references are added. To appear in this form in Physical Review

Complementarity in generic open quantum systems

We develop a unified, information theoretic interpretation of the number-phase complementarity that is applicable both to finite-dimensional (atomic) and infinite-dimensional (oscillator) systems, with number treated as a discrete Hermitian observable and phase as a continuous positive operator valued measure (POVM). The relevant uncertainty principle is obtained as a lower bound on {\it entropy excess}, $X$, the difference between the entropy of one variable, typically the number, and the knowledge of its complementary variable, typically the phase, where knowledge of a variable is defined as its relative entropy with respect to the uniform distribution. In the case of finite dimensional systems, a weighting of phase knowledge by a factor $\mu$ ($> 1$) is necessary in order to make the bound tight, essentially on account of the POVM nature of phase as defined here. Numerical and analytical evidence suggests that $\mu$ tends to 1 as system dimension becomes infinite. We study the effect of non-dissipative and dissipative noise on these complementary variables for oscillator as well as atomic systems.Comment: 18 pages, 15 figures; accepted for publication in Modern Physics Letters