Ashoke Sen

Short description: Indian physicist

Ashoke Sen

FRS

Ashoke Sen in the Physics department of Scottish Church College in 2019

Born|  (1956-07-15) 15 July 1956 (age 70)

Kolkata, West Bengal, India

Nationality| Indian
Alma mater|

* Presidency College, Kolkata (BSc)
* IIT Kanpur (MSc)
* Stony Brook University (PhD)

Known for| Contributions to string field theory
S-duality
Sen Conjecture
Spouse(s)| Sumathi Rao
Awards|

* G.D. Birla Award for Scientific Research (1996)
* TWAS Prize (1997)
* Padma Shri (2001)
* Infosys Prize - Mathematical Sciences (2009)
* Fundamental Physics Prize (2012)
* Padma Bhushan (2013)
* Dirac Medal (2014)

Scientific career
Fields| Physics
Institutions|

* Fermilab
* Stanford Linear Accelerator Center
* Tata Institute of Fundamental Research
* Harish-Chandra Research Institute

Doctoral advisor|

* George Sterman

Website| www.hri.res.in/~sen/

Ashoke Sen, FRS (/əˈʃoʊk sɛn/; born 1956) is an Indian theoretical physicist and distinguished professor at the Harish-Chandra Research Institute, Allahabad.[1] He is also an honorary fellow in National Institute of Science Education and Research (NISER), Bhubaneswar, India [2] and also a Morningstar Visiting professor at MIT and a distinguished professor at the Korea Institute for Advanced Study. His main area of work is string theory. He was among the first recipients of the Fundamental Physics Prize "for opening the path to the realisation that all string theories are different limits of the same underlying theory"[3].

## Contents

* 1 Early life
* 2 Career
* 3 Honors and awards
* 4 References
* 5 External links

## Early life

He was born on 15 July 1956[4] in Kolkata, and is the elder son of Anil Kumar Sen, a former professor of physics at the Scottish Church College, and Gouri Sen, a homemaker.[5]

After completing his schooling from Sailendra Sircar Vidyalaya in Kolkata, he earned his Bachelor of Science degree in 1975 from the Presidency College under the University of Calcutta, and his master's a year later from the Indian Institute of Technology Kanpur. During his undergraduate studies at Presidency, he was greatly inspired by the work and teaching of Amal Kumar Raychaudhuri. He did his doctoral work in physics at Stony Brook University.

## Career

String theory

Fundamental objects

* String
* Brane
* D-brane

Perturbative theory

* Bosonic
* Superstring
* Type I
* Type II (IIA / IIB)
* Heterotic (SO(32) * E8×E8)

Non-perturbative results

* S-duality
* T-duality
* U-duality
* M-theory
* F-theory
* AdS/CFT correspondence

Phenomenology

* Phenomenology
* Cosmology
* Landscape

Mathematics

* Mirror symmetry
* Monstrous moonshine

Related concepts

* Theory of everything
* Conformal field theory
* Quantum gravity
* Supersymmetry
* Supergravity
* Twistor string theory
* N = 4 supersymmetric Yang–Mills theory
* Kaluza–Klein theory
* Multiverse
* Holographic principle

Theorists

* Aganagić
* Arkani-Hamed
* Atiyah
* Banks
* Berenstein
* Bousso
* Cleaver
* Curtright
* Dijkgraaf
* Distler
* Douglas
* Duff
* Ferrara
* Fischler
* Friedan
* Gates
* Gliozzi
* Gopakumar
* Green
* Greene
* Gross
* Gubser
* Gukov
* Guth
* Hanson
* Harvey
* Hořava
* Gibbons
* Kachru
* Kaku
* Kallosh
* Kaluza
* Kapustin
* Klebanov
* Knizhnik
* Kontsevich
* Klein
* Linde
* Maldacena
* Mandelstam
* Marolf
* Martinec
* Minwalla
* Moore
* Motl
* Mukhi
* Myers
* Nanopoulos
* Naqvi
* Năstase
* Nekrasov
* Neveu
* Nielsen
* van Nieuwenhuizen
* Novikov
* Olive
* Ooguri
* Ovrut
* Polchinski
* Polyakov
* Rajaraman
* Ramond
* Randall
* Randjbar-Daemi
* Roček
* Rohm
* Scherk
* Schwarz
* Seiberg
* Sen
* Shenker
* Siegel
* Silverstein
* Sơn
* Staudacher
* Steinhardt
* Strominger
* Sundrum
* Susskind
* 't Hooft
* Townsend
* Trivedi
* Turok
* Vafa
* Veneziano
* Verlinde
* Verlinde
* Wess
* Witten
* Yau
* Yoneya
* Zamolodchikov
* Zamolodchikov
* Zaslow
* Zumino
* Zwiebach

* History
* Glossary

* v
* t
* e

Ashoke Sen made a number of major original contributions to the subject of string theory, including his landmark paper on strong-weak coupling duality or S-duality,[6] which was influential in changing the course of research in the field. He pioneered the study of unstable D-branes and made the famous Sen conjecture about open string tachyon condensation on such branes.[7] His description of rolling tachyons[8] has been influential in string cosmology. He has also co-authored many important papers on string field theory.

In 1998 he won the fellowship of the Royal Society on being nominated by the theoretical physicist Stephen Hawking.[1] His contributions include the entropy function formalism for extremal black holes and its applications to attractors. His recent important works include the attractor mechanism and the precision counting of microstates of black holes, and new developments in string perturbation theory. He joined the National Institute of Science Education and Research (NISER), Bhubaneswar, India as an honorary fellow.[9]

## Honors and awards

* ICTP Prize in 1989[10]
* Fellow of the Indian Academy of Sciences in 1991[4]
* S.S. Bhatnagar award in 1994
* TWAS Prize 1997[11]
* Fellow of the Royal Society 1998[1]
* Fellow of the Indian National Science Academy in 1996[12]
* Padma Shri in 2001[13]
* Infosys Prize in the Mathematical Sciences, 2009[14]
* Doctor of Science (Honoris Causa), 2009, awarded by IIT Kharagpur[15]
* Doctor of Science (Honoris Causa), 2011, awarded by Bengal Engineering and Science University, Shibpur (Presently Indian Institute of Engineering Science and Technology, Shibpur )[16]
* Fundamental Physics Prize, 2012, for his work on string theory[17][18][3]
* Padma Bhushan in 2013[19]
* M.P. Birla Memorial Award in 2013
* Doctor of Science (Honoris Causa), 2013, awarded by Indian Institute of Technology Bombay [20]
* Doctor of Letters (honorary), 2013, awarded by Jadavpur University
* Dirac Medal in 2014[21]

## References

1. ↑ 1.0 1.1 1.2 Pulakkat, Hari (19 December 2013). "How many of us know about Breakthrough Prize winner, Ashoke Sen?". The Economic Times. https://economictimes.indiatimes.com/opinion/et-commentary/how-many-of-us-know-about-breakthrough-prize-winner-ashoke-sen/articleshow/27612815.cms. Retrieved 4 September 2019.
2. ↑ "School of Physical Sciences". National Institute of Science Education and Research. https://www.niser.ac.in/sps/page/faculty. Retrieved 4 September 2019.
3. ↑ 3.0 3.1 "Fundamental Physics Breakthrough Prize". https://breakthroughprize.org/Laureates/1/L8.
4. ↑ 4.0 4.1 "Fellow Profile — Sen, Prof. Ashoke". Bangalore: Indian Academy of Sciences. http://www.ias.ac.in/describe/fellow/Sen,_Prof._Ashoke. Retrieved 23 January 2016.
5. ↑ Miudur, G.S. (2 August 2012). "Physicist with pillow power". https://www.telegraphindia.com/india/physicist-with-pillow-power/cid/389848. Retrieved 4 September 2019.
6. ↑ Sen, Ashoke (1994). "Dyon — monopole bound states, selfdual harmonic forms on the multi — monopole moduli space, and SL(2,Z) invariance in string theory". Phys. Lett. B329: 217–221. doi:10.1016/0370-2693(94)90763-3. Bibcode: 1994PhLB..329..217S.
7. ↑ Sen, Ashoke (1998). "Tachyon condensation on the brane antibrane system". JHEP 1998 (8): 012. doi:10.1088/1126-6708/1998/08/012. Bibcode: 1998JHEP...08..012S.
8. ↑ Sen, Ashoke (2002). "Rolling Tachyon". JHEP 2002 (4): 048. doi:10.1088/1126-6708/2002/04/048. Bibcode: 2002JHEP...04..048S.
9. ↑ "School of Physical Sciences". National Institute of Science Education and Research. https://www.niser.ac.in/sps/page/faculty. Retrieved 4 September 2019.
10. ↑ "ICTP Prize Winner 1989". https://www.ictp.it/about-ictp/prizes-awards/the-ictp-prize/the-prize-winners/ictp-prize-winner-1989.aspx. Retrieved 4 September 2019.
11. ↑ "Prizes and Awards". The World Academy of Sciences. https://twas.org/recipients-twas-awards-and-prizes. Retrieved 4 September 2019.
12. ↑ The Year Book 2014 // Indian National Science Academy, New Delhi.
13. ↑ "Padma Awards". Ministry of Home Affairs, Government of India. Archived from the original on 15 October 2015. https://web.archive.org/web/20151015193758/http://mha.nic.in/sites/upload_files/mha/files/LST-PDAWD-2013.pdf. Retrieved 21 July 2015.
14. ↑ Infosys Prize 2009 Mathematical Sciences
15. ↑ http://www.iitkgp.ac.in/institute/index.php?page=honors
16. ↑ [1][yes|permanent dead link|dead link}}]
17. ↑ "New annual US$3 million Fundamental Physics Prize recognizes transformative advances in the field". Breakthrough Prize. 31 July 2012. https://breakthroughprize.org/News/15. Retrieved 4 September 2019.
18. ↑ "Indian scientist Ashoke Sen bags top physics honour". The Times of India. 2 August 2012. http://economictimes.indiatimes.com/news/politics/nation/indian-scientist-ashoke-sen-bags-top-physics-honour/articleshow/15322177.cms. Retrieved 4 September 2019.
19. ↑ "Rajesh Khanna, Sridevi, Mary Kom, Rahul Dravid on Padma list". The Times of India. TNN. 26 January 2013. http://articles.timesofindia.indiatimes.com/2013-01-26/india/36563644_1_s-haider-raza-padma-awards-padma-vibhushan.
20. ↑ "IIT Bombay's fifty first convocation". Embide. 14 August 2013. https://www.embibe.com/exams/iit-bombays-fifty-first-convocation/undefined. Retrieved 4 September 2019.
21. ↑ "Dirac Medallists 2014". https://www.ictp.it/about-ictp/prizes-awards/the-dirac-medal/the-medallists/dirac-medallists-2014.aspx.

## External links

* Ashoke Sen CV
* "Thomson Honours Leading Indian Scientists"
* The Hindu, Sunday, January 7, 2001: "Stringing together the ultimate law"
* "Profile of Top 25 scientists in India". India Today. 11 September 2011. https://www.indiatoday.in/india/photo/profile-of-top-25-scientists-in-india-366262-2011-09-11. Retrieved 4 September 2019.

* v
* t
* e

Padma Bhushan award recipients (2010–2019)

2010|

* Satya Paul Agarwal
* Mohammad Amin
* Sailesh Kumar Bandopadhyay
* M. S. Banga
* Anil Bordia
* Bipan Chandra
* B. K. Chaturvedi
* Sant Singh Chatwal
* G. P. Chopra
* Tan Chung
* Madhusudan Dhaky
* P. R. Dubhashi
* Puttaraj Gawai
* Belle Monappa Hegde
* Ilaiyaraaja
* Jagdish Chandra Kapur
* Shrinivas Khale
* Aamir Khan
* Sultan Khan
* Ram Kumar
* Kumudini Lakhia
* Kuzhur Narayana Marar
* Chhannulal Mishra
* Eledath Thaikkattu Narayanan Mooss
* C. P. Krishnan Nair
* S. P. Oswal
* Akbar Padamsee
* Ramakanta Panda
* Balasaheb Vikhe Patil
* Arogyaswami Paulraj
* A. R. Rahman
* Moosa Raza
* Mallika Sarabhai
* Nookala Chinna Satyanarayana
* Abhijit Sen
* Satya Vrat Shastri
* Noshir M. Shroff
* Kushal Pal Singh
* Bikash Sinha
* Balagangadharanatha Swamiji
* Narayanan Vaghul
* P. K. Warrier
* Fareed Zakaria

2011|

* S. P. Balasubrahmanyam
* Rajashree Birla
* M. N. Buch
* C. V. Chandrasekhar
* Ajai Chowdhry
* Yogesh Chander Deveshwar
* Satyadev Dubey
* T. J. S. George
* Shankha Ghosh
* Kris Gopalakrishnan
* Keki Byramjee Grant
* Shashi Kapoor
* Krishen Khanna
* Khayyam
* Chanda Kochhar
* Dwijen Mukhopadhyay
* Madavoor Vasudevan Nair
* Ramdas Pai
* Dashrath Patel
* Rajendra Singh Pawar
* Suryanarayanan Ramachandran
* Shobhana Ranade
* Gunupati Venkata Krishna Reddy
* Kallam Anji Reddy
* Waheeda Rehman
* Shyam Saran
* Analjit Singh
* Arpita Singh
* Surendra Singh
* R. K. Srikantan
* Raghavan Thirumulpad

2012|

* Suresh H. Advani
* Shabana Azmi
* Homi K. Bhabha
* Shashikumar Chitre
* Khaled Choudhury
* Jatin Das
* Vidya Dehejia
* Dharmendra
* S. N. Goenka
* M. S. Gopalakrishnan
* T. V. Gopalakrishnan
* Buddhadev Das Gupta
* Sunil Janah
* Anish Kapoor
* S. B. Mujumdar
* B. Muthuraman
* Mira Nair
* Arvind Panagariya
* José Pereira
* Mata Prasad
* M. S. Raghunathan
* P. Chandrasekhara Rao
* Ronen Sen
* Devi Shetty
* M. V. Subbiah
* N. Vittal
* N. H. Wadia
* George Yeo

2013|

* Satya N. Atluri
* Maharaj Kishan Bhan
* Jaspal Bhatti
* Rahul Dravid
* Adi Godrej
* Abdul Rashid Khan
* Rajesh Khanna
* Mary Kom
* Nandkishore Shamrao Laud
* Mangesh Padgaonkar
* Hemendra Singh Panwar
* Jogesh Pati
* Shivajirao Girdhar Patil
* A. Sivathanu Pillai
* D. Ramanaidu
* Kanak Rele
* V. K. Saraswat
* Ashoke Sen
* Gayatri Chakravorty Spivak
* B. N. Suresh
* Sharmila Tagore
* Ramamurthy Thyagarajan
* Saroja Vaidyanathan

2014|

* Anisuzzaman
* Mrityunjay Athreya
* Padmanabhan Balaram
* Dalveer Bhandari
* Ruskin Bond
* Anita Desai
* Pullela Gopichand
* Kamal Haasan
* Jyeshtharaj Joshi
* V. N. Kaul
* Neelam Kler
* M. Mahadevappa
* Leander Paes
* K. Radhakrishnan
* Anumolu Ramakrishna
* Thirumalachari Ramasami
* Lloyd Rudolph
* Susanne Hoeber Rudolph
* Vinod Prakash Sharma
* Ghulam Mohammed Sheikh
* Parveen Sultana
* Dhirubhai Thaker
* Vairamuthu
* J. S. Verma
* T. H. Vinayakram

2015|

* Jahnu Barua
* Manjul Bhargava
* Vijay P. Bhatkar
* Swapan Dasgupta
* David Frawley
* Bill Gates
* Melinda Gates
* Swami Satyamitranand
* N. Gopalaswami
* Subhash C. Kashyap
* Gokulotsavji Maharaj
* Saichiro Misumi
* Ambrish Mithal
* Sudha Ragunathan
* Harish Salve
* Ashok Seth
* Rajat Sharma
* Satpal Singh
* Shivakumara Swami
* Khadg Singh Valdiya

2016|

* Ravindra Chandra Bhargava
* Robert Blackwill
* Hafeez Contractor
* Indu Jain
* Heisnam Kanhailal
* Anupam Kher
* Sania Mirza
* Pallonji Mistry
* Udit Narayan
* Saina Nehwal
* Yarlagadda Lakshmi Prasad
* Vinod Rai
* N. S. Ramanuja Tatacharya
* A. V. Rama Rao
* D. Nageshwar Reddy
* Dayananda Saraswati
* Barjinder Singh Hamdard
* Ram V. Sutar
* Tejomayananda

2017|

* Vishwa Mohan Bhatt
* Deviprasad Dwivedi
* Ratnasundarsuri
* Niranjanananda Saraswati
* Cho Ramaswamy
* Maha Chakri Sirindhorn
* Tehemton Erach Udwadia

2018|

* Pankaj Advani
* Philipose Mar Chrysostom
* Mahendra Singh Dhoni
* Alexander Kadakin
* Ramachandran Nagaswamy
* Laxman Pai
* Arvind Parikh
* Sharda Sinha

2019|

* John T. Chambers
* Sukhdev Singh Dhindsa
* Pravin Gordhan
* Mahashay Dharampal Gulati
* Darshan Lal Jain
* Ashok Laxmanrao Kukade
* Kariya Munda
* Budhaditya Mukherjee
* Mohanlal
* Nambi Narayanan
* Kuldip Nayar
* Bachendri Pal
* V. K. Shunglu
* Hukmdev Narayan Yadav

# Posthumous conferral

* 1954–1959
* 1960–1969
* 1970–1979
* 1980–1989
* 1990–1999
* 2000–2009
* 2010–2019
* 2020–2029

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