Nilanjan Sircar | Tel Aviv University (original) (raw)

Nilanjan Sircar

Supervisors: Dr. B. Sathiapalan

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Papers by Nilanjan Sircar

Research paper thumbnail of Can the Hagedorn phase transition be explained from matrix model for strings

Journal of High Energy Physics, 2008

The partition function of BFSS matrix model is studied for two different classical backgrounds up... more The partition function of BFSS matrix model is studied for two different classical backgrounds upto 1-loop level. One of the backgrounds correspond to a membrane wrapped around a compact direction and another to a localized cluster of D0D0D0-branes. It is shown there exist phase transitions between these two configurations - but only in presence of an IR cut-off. The low temperature phase corresponds to a string (wrapped membrane) phase and so we call this the Hagedorn phase transition. While the presence of an IR cut-off seemingly is only required for perturbative analysis to be valid, the physical necessity of such a cut-off can be seen in the dual supergravity side. It has been argued from entropy considerations that a finite size horizon must develop even in an extremal configuration of D0-branes, from higher derivative O(gs)O(g_s)O(gs) corrections to supergravity. It can then be shown that the Hagedorn like transition exists in supergravity also. Interestingly the perturbative analysis also shows a second phase transition back to a string phase. This is also reminiscent of the Gregory-Laflamme instability.

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Research paper thumbnail of Properties of CFTs dual to charged BTZ black hole

Nuclear Physics B, 2010

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Research paper thumbnail of Can the Hagedorn phase transition be explained from matrix model for strings

Journal of High Energy Physics, 2008

The partition function of BFSS matrix model is studied for two different classical backgrounds up... more The partition function of BFSS matrix model is studied for two different classical backgrounds upto 1-loop level. One of the backgrounds correspond to a membrane wrapped around a compact direction and another to a localized cluster of D0D0D0-branes. It is shown there exist phase transitions between these two configurations - but only in presence of an IR cut-off. The low temperature phase corresponds to a string (wrapped membrane) phase and so we call this the Hagedorn phase transition. While the presence of an IR cut-off seemingly is only required for perturbative analysis to be valid, the physical necessity of such a cut-off can be seen in the dual supergravity side. It has been argued from entropy considerations that a finite size horizon must develop even in an extremal configuration of D0-branes, from higher derivative O(gs)O(g_s)O(gs) corrections to supergravity. It can then be shown that the Hagedorn like transition exists in supergravity also. Interestingly the perturbative analysis also shows a second phase transition back to a string phase. This is also reminiscent of the Gregory-Laflamme instability.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Properties of CFTs dual to charged BTZ black hole

Nuclear Physics B, 2010

Bookmarks Related papers MentionsView impact

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