Recent content by yancey

lol:)

Choppy and Dr. Claude, thanks for your detailed introduction on the workflow of going over manuscripts. Maybe I was too anxious, it's my second paper in my academic career...I should be more patient.

Hi, everyone, I submitted a manuscript to Physics Letters B on about June, 10th. Then received the reply from the editor with two reviewers'comments on July, 15th. Reviewer #1 had some criticle comments on the theory which my paper was based on and gave some advise to me; Reviewer #2 had some...

Thanks for your attention. I was reading a paper on a model of generalized uncertainty principle which originated from quantum gravity effect. ##\alpha## represents the parameter of quantum gravity effect.

hello, everyone. When a vector field ##A_{\mu}## has the Lagrangian of the form as ##L=Const.{\times}F^{\mu\nu}F_{\mu\nu}##, where...

LIGO announced the detection of gravitational wave event GW150914, which coincided with the numerical waveform predicted by GR. The PRL paper says "Using fitting formulas calibrated to numerical relativity simulations, we verified that the remnant mass and spin deduced from the early stage of...

Thanks for reminding me this. I really ignored the point you mentioned above. However I also have some confusions. In cosmology, people always use the usual action to describe inflation, eg. $$S=\int dx^4\sqrt{-g}[-\frac{1}{16\pi}-\frac{1}{2}(\partial _{\mu }\phi )^{2}-V(\phi)]$$for the scalar...

I should calculate the variation of the Ricci scalar to the metric ##\delta R/\delta g^{\mu\nu}##. According to ##\delta R=R_{\mu\nu}\delta g^{\mu\nu}+g^{\mu\nu}\delta R_{\mu\nu}##, ##\delta R_{\mu\nu}## should be calculated. I have referred to the wiki page...

Dear everyone, Now, I'm reading some papers on the "Curvaton Mechanism"(eg.http://arxiv.org/abs/hep-ph/0110002v2 as the original literature.) Here I have some confusion on this topic. (1) Why the primordial perturbation of curvaton field is initially isocurvature-type? When the inflation driven...

Thank you, Einj. You explained my confusion clearly!

Dear everyone, For example, the simplest action for a nonminimally coupled scalar field is S=\int d^{4}x\sqrt{-g}\left[ \frac{1}{2}g^{\mu \nu }\partial _{\mu }\phi \partial _{\nu }\phi -V(\phi )+\frac{\xi }{2}R\phi ^{2}\right]. \xi=0 leads to the scalar field minimally coupled to the...