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9 papers · 2 filters
Calabi-Yau Three-folds: Poincare Polynomials and Fractals
Anthony Ashmore, Yang-Hui He
We study the Poincare polynomials of all known Calabi-Yau three-folds as constrained polynomials of Littlewood type, thus generalising the well-known investigation into the distrib…
Heterotic Bundles on Calabi-Yau Manifolds with Small Picard Number
Yang-Hui He, Maximilian Kreuzer, Seung-Joo Lee +1
We undertake a systematic scan of vector bundles over spaces from the largest database of known Calabi-Yau three-folds, in the context of heterotic string compactification. Specifi…
Invariants of Toric Seiberg Duality
Amihay Hanany, Yang-Hui He, Vishnu Jejjala +3
Three-branes at a given toric Calabi-Yau singularity lead to different phases of the conformal field theory related by toric (Seiberg) duality. Using the dimer model/brane tiling d…
Violation of the first law of black hole thermodynamics in gravity
Rong-Xin Miao, Miao Li, Yan-Gang Miao
We prove that, in general, the first law of black hole thermodynamics, , is violated in gravity. As a result, it is possible that there exists entropy production, wh…
Degrees of freedom of gravity
Miao Li, Rong-Xin Miao, Yan-Gang Miao
We investigate the Hamiltonian formulation of gravity and find that there are five degrees of freedom. The six first class constraints corresponding to the local Lorentz tra…
The coordinate coherent states approach revisited
Yan-Gang Miao, Shao-Jun Zhang
We revisit the coordinate coherent states approach through two different quantization procedures in the quantum field theory on the noncommutative Minkowski plane. The first proced…