195 research outputs found
Topological hypermultiplet on N=2 twisted superspace in four dimensions
We propose a N=2 twisted superspace formalism with a central charge in four
dimensions by introducing a Dirac-K\"ahler twist. Using this formalism, we
construct a twisted hypermultiplet action and find an explicit form of
fermionic scalar, vector and tensor transformations. We construct a off-shell
Donaldson-Witten theory coupled to the twisted hypermultiplet. We show that
this action possesses N=4 twisted supersymmetry at on-shell level. It turns out
that four-dimensional Dirac-K\"ahler twist is equivalent to the Marcus's twist.Comment: 20 pages, no figur
Supersymmetric Matrix model on Z-orbifold
We find that the IIA Matrix models defined on the non-compact ,
and orbifolds preserve supersymmetry where the fermions
are on-mass-shell Majorana-Weyl fermions. In these examples supersymmetry is
preserved both in the orbifolded space and in the non-orbifolded space at the
same time. The Matrix model on orbifold has the same
supersymmetry as the case of
orbifold which was pointed out previously.
On the other hand the Matrix models on and orbifold have
a half of the supersymmetry. We further find that the Matrix model
on orbifold with a parity-like identification preserves
supersymmetry.Comment: 21 pages, no figur
Volume of Moduli Space of Vortex Equations and Localization
We evaluate volume of moduli space of BPS vortices on a compact Riemann
surface by using topological field theory and localization technique developed
by Moore, Nekrasov and Shatashvili. We apply this technique to Abelian (ANO)
vortex and show that the volume of moduli space agrees with the previous
results obtained by integrating over the moduli space metric. We extend the
evaluation to non-Abelian gauge groups and multi-flavors. We also compare our
results with the volume of the Kahler quotient space inspired by the brane
configuration.Comment: 45 pages, 1 figure, note and references adde
Off-shell Invariant D=N=2 Twisted Super Yang-Mills Theory with a Gauged Central Charge without Constraints
We formulate N=2 twisted super Yang-Mills theory with a gauged central charge
by superconnection formalism in two dimensions. We obtain off-shell invariant
supermultiplets and actions with and without constraints, which is in contrast
with the off-shell invariant D=N=4 super Yang-Mills formulation with
unavoidable constraints.Comment: 14 page
Moduli space volume of vortex and localization
Volume of moduli space of BPS vortices on a compact genus h Riemann surface
Sigma_h is evaluated by means of topological field theory and localization
technique. Vortex in Abelian gauge theory with a single charged scalar field
(ANO vortex) is studied first and is found that the volume of the moduli space
agrees with the previous results obtained more directly by integrating over the
moduli space metric. Next we extend the evaluation to non-Abelian gauge groups
and multi-flavors of scalar fields in the fundamental representation. We find
that the result of localization can be consistently understood in terms of
moduli matrix formalism wherever possible. More details are found in our paper
in Prog.Theor.Phys.126 (2011) 637.Comment: 10 pages, talk at the international conference "quantum theory and
symmetries 7" in prague, august 7-13, 201
Adsorption of Saliva Related Protein on Denture Materials: An X-Ray Photoelectron Spectroscopy and Quartz Crystal Microbalance Study
The aim of this study was to evaluate the difference in the adsorption behavior of different types of bovine salivary proteins on the PMMA and Ti QCM sensors are fabricated by spin-coating and sputtering onto bare QCM sensors by using QCM and X-ray photoelectron spectroscopy (XPS). SPM, XPS, and contact angle investigations were carried out to determine the chemical composition and surface wettability of the QCM surface. We discuss the quality of each sensor and evaluate the potential of the high-frequency QCM sensors by investigating the binding between the QCM sensor and the proteins albumin and mucin (a salivary-related protein). The SPM image showed a relatively homogeneous surface with nano-order roughness. The XPS survey spectra of the thin films coated on the sensors were similar to the binding energy of the characteristic spectra of PMMA and Ti. Additionally, the amount of salivary-related protein on the PMMA QCM sensor was higher than those on the Ti and Au QCM sensors. The difference of protein adsorption is proposed to be related to the wettability of each material. The PMMA and Ti QCM sensors are useful tools to study the adsorption and desorption of albumin and mucin on denture surfaces
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