কেতিয়াবা কবিতা লিখিবলৈও মন যায়,
এনে এক কবিতা যি তোমাৰ বুকুত প্ৰেমৰ কঠিয়া সিঁচে,
কিন্তু দুৰ্ভিক্ষত আক্ৰান্ত এই হৃদয়ে আজি শব্দ বিচাৰি কৰিছে হাহাকাৰ,
শুনা পাইছানে তুমি সেই হৃদয়ৰ আৰ্তনাদ ?
শুনা পালে পঠাবা মোলৈ শব্দৰ এজাক বৰষুণ
মোৰ হৃদয়তো গজালি মেলিব কবিতাই
তোমালৈ বুলি কবিতা লিখিম
তোমাক ভাল পাবলৈ শিকিম.........
Monday, August 8, 2011
15th August is approaching, and India is going to celebrate her 65th Independence day. The country, although got freedom from the British rule in 1947, is yet to get freedom from many other things: poverty, illiteracy, insurgency, unemployment, corruption, illegal immigration are few of them. Specially the people of rural India are yet to understand what independence or freedom actually means. Situation is even worse in North East(NE) India, an alien land to rest of India as well as the central government. All the above listed parasites are there in this part of land since the day India got her freedom. The step motherly attitude of the central government as well as the lack of good leaders from this region are possibly the main reasons why NE, a paradise on earth so to say, has always been affected by the above mentioned problems. There are huge number of articles or books related to NE India and its problems which I am not going to repeat here, neither I have studied enough to suggest effective solutions to all these issues. It's just that I feel very nostalgic as this day approaches. Although I have been outside NE India since 2003, yet I come to know from my family and friends there about the celebrations, fears, anxieties in the minds of people there as the Independence day approaches. Things have not changed there, Independence day means a holiday, a holiday of a different kind when people prefer to stay inside home, shop owners never open their shops and car owners never hit the streets. Few government officers come to their respective offices for flag hoisting amidst tight security. Even the Indian railways cancel their trains for around 1 week fearing attacks creating lots of problems for common people who have to travel everyday. I am sure most of the people would even wish if this 15th August day had never come to their lives, they would have probably lived a better life. I wonder how soon these things will change there, I haven't seen any change throughout my life but still hopeful of seeing some changes so that people can come out of their homes to celebrate Independence day without fear but with the pride of being an Indian. Jai Hind!
Couple of months ago, I posted something expressing my anger and frustration about scientific peer review. I had a hard time then dealing with the referee's comments related to one of my papers. Sometimes referee suggest some more work, and after I actually do them and resubmit, the referee comes up with some other objections and reject the whole paper and the whole process cost me several months. Sometimes the situation is even worse. The editor responds like this: "One referee recommends publishing your paper and one referee doesn't. Hence I decide not to publish your paper." I am not kidding, this indeed happened with me. But after I started sending papers to Physical Review, my opinions about scientific peer review have changed. No matter they publish your article or not, the comments of criticism they send are really helpful. It helped me learn much beyond the content of my paper, and in some cases improved the quality of the paper by several times. Rejection on the basis of concrete justifications is never depressing, it is rather encouraging to do better. I have become a big fan of Physical Review now and would always prefer to send my articles to them without worrying too much about impact factors. But of course, I have not communicated with many other publishers, so can't comment on whether they will be better or worse than Physical Review in terms of reviewers comments.
Friday, August 5, 2011
I am happy to be back in blogosphere after a gap of around one and a half months. There were too many things I was involved in related to the administrative branch of my home institute. Slow and inefficient Indian bureaucracy takes too much time to get things done, can't help it. Anyway, I am feeling quite blank regarding what to post. The easiest thing to post is about my latest paper which appeared in arxiv last week. The title of this post is the arxiv pre-print number of my article.
The paper titled as " Spontaneous Parity Breaking and Supersymmetry Breaking in Metastable Vacua with Consistent Cosmology" is all about study of some cosmological issues in a model where Left-Right symmetry can be broken spontaneously as well as Supersymmetry can be broken in a metastable vacua without any reference to hidden sectors (like in usual Supersymmetry breaking models) . Such a model was constructed recently by a Japanese group, we study it in details and point out some cosmological issues which needs to be addressed. The issue is related to the formation of domain walls (extended two dimensional topological objects) which are formed after the phase transition accompanying the discrete left right symmetry breaking. These domain walls have very high energy density compared to usual matter or radiation and if they start dominating the Universe, the standard cosmology will be in trouble in view of recent experimental data from WMAP (Wilkinson Mass Anisotropy Probe). We discussed some techniques to get rid of such unwanted walls in earlier works also and the basic idea is to incorporate gravitational effects which break the discrete symmetry explicitly leading to a pressure difference across the walls. Thus the true vacuum will expand and occupy the entire observable Universe. The model we are studying in this present paper is however different from earlier models in the sense that here both left right symmetry breaking and supersymmetry breaking mechanisms are specifically mentioned, that too without talking about hidden sectors. Such theories are based on Seiberg duality which relates a UV free supersymmetric gauge theory to an IR free magnetic theory thereby making computations easier in both the regimes. The magnetic theory , if assumed to describe the low energy world, also breaks Supersymmetry spontaneously. Supersymmetry preserving vacua also appear dynamically in the magnetic theory leading to metastable vacua. The work I have done, studied the constraints coming from such long lifetime of metastable vacua as well as domain wall disappearance in the left right symmetric model. The life time constraint gives a lower bound on the left right symmetry breaking scale whereas the domain wall disappearance puts an upper bound on that scale. Fortunately these bounds don't conflict each other and more excitingly the lower bound coming from long life time of metastable vacua requirement lies pretty close to the TeV scale. Anyway much more work needs to be done in these models and our work just tells a tiny part of it concerning mainly the domain wall disappearance!