Quantum 1/4 BPS Dyons

Classical properties of 1/4 BPS dyons were previously well understood both in field theory context and in string theory context. Its quantum properties, however, have been more difficult to probe, although the elementary information of the supermultiplet structures is known from a perturbative construction. Recently, a low energy effective theory of monopoles was constructed and argued to contain these dyons as quantum bound states. In this paper, we find these dyonic bound states explicitly in the N=4 supersymmetric low energy effective theory. After identifying the correct angular momentum operators, we motivate an anti-self-dual ansatz for all BPS bound states. The wavefunctions are found explicitly, whose spin contents and degeneracies match exactly the expected results.Comment: 20 pages, no figure

Spectrum: v. 1, no. 1-4

Spectrum was a newsletter for students, faculty, staff and alumni of the Henry M. Goldman School of Dental Medicine, published from 1983-1992

PENGARUH STRES DAN MOTIVASI KERJA TERHADAP PRESTASI KERJA KARYAWAN DI PT. BANK TABUNGAN NEGARA (PERSERO) TBK KANTOR CABANG BANDUNG

ABSTRAK Penelitian ini berawal dari ditemukannya masalah prestasi kerja yang belum optimal yang disebabkan oleh adanya stres kerja dan rendahnya motivasi kerja. Tujuan penelitian ini adalah untuk mengetahui dan menganalisa pengaruh stres kerja dan motivasi kerja terhadap prestasi kerja karyawan baik secara simultan maupun parsial di PT. Bank Tabungan Negara Kantor Cabang Bandung. Penelitian ini menggunakan pendekatan kuantitatif. Teknik pengumpulan data yang digunakan adalah penelitian lapangan (field research), studi kepustakaan (library research), dan angket penelitian. Metode analisis data yang digunakan adalah metode analisis linier regresi berganda, korelasi berganda, dan koefisien determinasi. Hasil penelitian ini menunjukan bahwa stres kerja berpengaruh negatif dan signifikan terhadap prestasi kerja karyawan. Motivasi kerja berpengaruh positif dan signifikan terhadap prestasi kerja karyawan. Sementara itu variabel stres dan motivasi berpengaruh signifikan bersama-sama terhadap prestasi kerja karyawan di PT. Bank Tabungan Negara Kantor Cabang Bandung. Kata Kunci : Stres Kerja, Motivasi Kerja, Prestasi Kerj

A Note on 1/4-BPS States

We study classical solutions of N=4 super Yang-Mills theories that are invariant under 1/4 of the supersymmetry generators. Expressions for the mass and electric charge of the configurations are derived as functions on the monopole moduli space. These functions also provide a method of determining the number of normalisable bosonic zero modes.Comment: 10 pages, LaTe

Manifolds with 1/4-pinched flag curvature

We say that a nonnegatively curved manifold $(M,g)$ has quarter pinched flag curvature if for any two planes which intersect in a line the ratio of their sectional curvature is bounded above by 4. We show that these manifolds have nonnegative complex sectional curvature. By combining with a theorem of Brendle and Schoen it follows that any positively curved manifold with strictly quarter pinched flag curvature must be a space form. This in turn generalizes a result of Andrews and Nguyen in dimension 4. For odd dimensional manifolds we obtain results for the case that the flag curvature is pinched with some constant below one quarter, one of which generalizes a recent work of Petersen and Tao

1/4-BPS states on noncommutative tori

We give an explicit expression for classical 1/4-BPS fields in supersymmetric Yang-Mills theory on noncommutative tori. We use it to study quantum 1/4-BPS states. In particular we calculate the degeneracy of 1/4-BPS energy levels.Comment: 15 pages, Latex; v.2 typos correcte

String Webs and 1/4 BPS Monopoles

We argue for the existence of many new 1/4 BPS states in N=4 SU(N_c) Super-Yang-Mills theory with N_c>=3, by constructing them from supersymmetric string webs whose external strings terminate on parallel D3-branes. The masses of the string webs are shown to agree with the BPS bound for the corresponding states in SYM. We identify the curves of marginal stability, at which these states decay into other BPS states. We find the bosonic and fermionic zero modes of the string webs, and thereby the degeneracy and spin content of some of the BPS states. States of arbitrarily high spin are predicted in this manner, all of which become massless at the conformal point. For N_c>=4 we find BPS states which transform in long multiplets, and are therefore not protected against becoming stable non-BPS states as moduli are varied. The mass of these extremal non-BPS states is constrained as they are connected to BPS states. Analogous geometric phenomena are anticipated.Comment: 29 pages LaTex, 5 eps figure