KMS, etc

A general form of the ``Wick rotation'', starting from imaginary-time Green functions of quantum-mechanical systems in thermal equilibrium at positive temperature, is established. Extending work of H. Araki, the role of the KMS condition and of an associated anti-unitary symmetry operation, the ``modular conjugation'', in constructing analytic continuations of Green functions from real- to imaginary times, and back, is clarified. The relationship between the KMS condition for the vacuum with respect to Lorentz boosts, on one hand, and the spin-statistics connection and the PCT theorem, on the other hand, in local, relativistic quantum field theory is recalled. General results on the reconstruction of local quantum theories in various non-trivial gravitational backgrounds from ``Euclidian amplitudes'' are presented. In particular, a general form of the KMS condition is proposed and applied, e.g., to the Unruh- and the Hawking effects. This paper is dedicated to Huzihiro Araki on the occasion of his seventieth birthday, with admiration, affection and best wishes.Comment: 56 pages, submitted to J. Math. Phy

Invariance of KMS states on graph C*-algebras under classical and quantum symmetry

We study invariance of KMS states on graph C*-algebras coming from strongly connected and circulant graphs under the classical and quantum symmetry of the graphs. We show that the unique KMS state for strongly connected graphs is invariant under quantum automorphism group of the graph. For circulant graphs, it is shown that the action of classical and quantum automorphism group preserves only one of the KMS states occurring at the critical inverse temperature. We also give an example of a graph C*-algebra having more than one KMS state such that all of them are invariant under the action of classical automorphism group of the graph, but there is a unique KMS state which is invariant under the action of quantum automorphism group of the graph.Comment: 15 pages, 2 figure

Thermal States in Conformal QFT. II

We continue the analysis of the set of locally normal KMS states w.r.t. the translation group for a local conformal net A of von Neumann algebras on the real line. In the first part we have proved the uniqueness of KMS state on every completely rational net. In this second part, we exhibit several (non-rational) conformal nets which admit continuously many primary KMS states. We give a complete classification of the KMS states on the U(1)-current net and on the Virasoro net Vir_1 with the central charge c=1, whilst for the Virasoro net Vir_c with c>1 we exhibit a (possibly incomplete) list of continuously many primary KMS states. To this end, we provide a variation of the Araki-Haag-Kastler-Takesaki theorem within the locally normal system framework: if there is an inclusion of split nets A in B and A is the fixed point of B w.r.t. a compact gauge group, then any locally normal, primary KMS state on A extends to a locally normal, primary state on B, KMS w.r.t. a perturbed translation. Concerning the non-local case, we show that the free Fermi model admits a unique KMS state.Comment: 36 pages, no figure. Dedicated to Rudolf Haag on the occasion of his 90th birthday. The final version is available under Open Access. This paper contains corrections to the Araki-Haag-Kaster-Takesaki theorem (and to a proof of the same theorem in the book by Bratteli-Robinson). v3: a reference correcte

On The KMS Condition for the critical Ising model

Using the KMS condition and exchange algebras we discuss the monodromy and modular properties of two-point KMS states of the critical Ising model.Comment: 8 pages, TcilaTe

Penerapan Knowledge management System Pada Perusahaan Bisnis Konsultasi PT. Piramedia Sejahtera Abadi (Red Piramid)

The article clarified the implementation of Knowledge Management System (KMS), analysis the benefit of implementation, and cultures the sharing knowledge on the company. The used research methods were Focus Group Discussion (FGD), information system strategy analysis, and Knowledge Management process. It can be concluded that the implementation of KMS is in high potential for the company. The selection on the implementation of Knowledge Management application on Red Piramid was based on the implication that will be happened to service and the possibility on the movement of KMS into strategic field. From the review result, it is also recommended that the use of Content Management System using intranet facility that is available on Red Piramid. Artikel menjelaskan penerapan sistem Knowledge Management System (KMS, menganalisis manfaat penerapan, dan membudayakan sharing knowledge pada perusahaan tersebut. Metode penelitian yang digunakan adalah Focus Group Discussion (FGD), analisis strategi sistem informasi, dan proses Knowledge Management. Hasil penelitian menyimpulkan bahwa penerapan aplikasi KMS terdapat dalam ranah high potential. Pemilihan penerapan aplikasi pada Red Piramid didasarkan pada implikasi yang akan terjadi terhadap jasa yang akan diterapkan serta kemungkinan bergeraknya penerapan KMS ke ranah stratejik. Dari hasil penilaian tersebut direkomendasikan pula penggunaan Content Management System menggunakan fasilitas intranet yang telah tersedia di Red Piramid

The enablers and implementation model for mobile KMS in Australian healthcare

In this research project, the enablers in implementing mobile KMS in Australian regional healthcare will be investigated, and a validated framework and guidelines to assist healthcare in implementing mobile KMS will also be proposed with both qualitative and quantitative approaches. The outcomes for this study are expected to improve the understanding the enabling factors in implementing mobile KMS in Australian healthcare, as well as provide better guidelines for this process