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	== See also ==		== See also ==
	~~{{Portal\|India\|Physics}}~~
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	* [[Bell's theorem]]		* [[Bell's theorem]]

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Biography: picture is tangentially related; removed

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{{short description|Indian quantum physicist (born 1941)}}
{{Use dmy dates|date=December 2018}}
{{Use Indian English|date=December 2018}}
{{Infobox scientist
| name = Shasanka Mohan Roy
| image =
| alt =
| caption =
| birth_date = {{Birth date and age|1941|9|2|df=y}}
| birth_place = Delhi, India
| death_date =
| death_place =
| residence = [[Vashi]], [[Navi Mumbai]], [[Maharashtra]], India
| nationality = [[Indian nationality|Indian]]
| fields = {{ublist | [[High energy physics]] | [[Quantum field theory]] }}
| workplaces = {{ublist | [[Tata Institute of Fundamental Research]] | [[Jawaharlal Nehru University]] | [[European Organization for Nuclear Research]] | [[Saclay Nuclear Research Centre]] | [[University of Lausanne]] | [[Syracuse University]] | [[University of Alberta]] | [[University of Kaiserslautern]] | [[University of York]] }}
| alma_mater = {{ublist | [[University of Delhi]] | [[Princeton University]] |[[University of California, San Diego]] }}
| doctoral_advisor =
| doctoral_students =
| known_for = {{ublist | Roy's equations | Roy-Singh bounds }}
| awards = {{ublist| 1981 [[Shanti Swarup Bhatnagar Prize]] | 2003 [[Indian Science Congress Association|ISCA]] S. N. Bose Birth Centenary Gold Medal }}
}}
'''Shasanka Mohan Roy''' (born 2 September 1941) is an Indian [[quantum physicist]] and a [[Raja Ramanna]] fellow of the [[Department of Atomic Energy]] at the School of Physical Sciences of [[Jawaharlal Nehru University]]. He is also a former chair of the ''Theoretical Physics Group Committee'' at [[Tata Institute of Fundamental Research]]. Known for developing ''Exact Integral Equation'' on ''pion-pion dynamics'', also called ''Roy's equations'', and his work on [[Bell's theorem|Bell inequalities]], Roy is an elected fellow of all the three major Indian science academies – [[Indian Academy of Sciences]], [[Indian National Science Academy]], and [[National Academy of Sciences, India]] – as well as [[The World Academy of Sciences]]. The [[Council of Scientific and Industrial Research]], the apex agency of the Government of India for scientific research, awarded Roy the [[Shanti Swarup Bhatnagar Prize for Science and Technology]], one of the highest Indian science awards, for his contributions to Physical Sciences in 1981.<ref name="View Bhatnagar Awardees">{{cite web | url=http://ssbprize.gov.in/Content/AwardeeList.aspx | title=View Bhatnagar Awardees | publisher=Shanti Swarup Bhatnagar Prize | date=2016 | accessdate=12 November 2016}}</ref>{{Refn|group=note|Long link – please select award year to see details}}

== Biography ==
Roy, born on 2 September 1941 in the Indian capital of Delhi, did his early college studies at [[Delhi University]] from where he earned a BSc (hons) in 1960 and an MSc in 1962.<ref name="Indian fellow">{{Cite web |url=http://insaindia.res.in/detail/N89-1033 |title=Indian fellow |date=2017 |publisher=Indian National Science Academy}}</ref> Subsequently, he moved to the US on a [[union territories]] overseas scholarship for his doctoral studies at [[Princeton University]] and after securing a PhD in 1966, he did his post-doctoral work at the [[University of California, San Diego]] from 1966 to 1967.<ref name="Curriculum vitae on TIFR">{{Cite web |url=http://theory.tifr.res.in/~shasanka/cv06.pdf |title=Curriculum vitae on TIFR |date=2017 |publisher=Tata Institute of Fundamental Research}}</ref> On his return to India, Roy joined [[Tata Institute of Fundamental Research]] in 1967 to commence an association which would last close to four decades and during this period, he chaired the Theoretical Physics Group Committee of the institution from 1992 to 1997. He was serving as a senior professor at the time of his superannuation in 2006. Post retirement from regular service, Roy joined [[Jawaharlal Nehru University]] as a Raja Ramanna fellow of the [[Department of Atomic Energy]] at the ''School of Physical Sciences''. He also held visiting faculty positions at a number of institutions abroad which included four stints at [[European Organization for Nuclear Research]] (CERN) and one each at [[Saclay Nuclear Research Centre]], [[University of Lausanne]], [[Syracuse University]], [[University of Alberta]], [[University of Kaiserslautern]] and [[University of York]].<ref name="Curriculum vitae on TIFR" />

Roy is married to Nandita and the couple has two children, Arunabha and Aditi.<ref name="Curriculum vitae on TIFR" /> The family lives in [[Vashi]], one of the nodes of [[Navi Mumbai]] in [[Maharashtra]].<ref name="NASI fellows">{{Cite web |url=http://www.nasi.org.in/fellows.asp?RsFilter=R |title=NASI fellows |date=2017 |publisher=National Academy of Sciences, India}}</ref>

== Legacy ==
[[File:EPR illustration.svg|thumb|235px|[[EPR paradox]] illustration]]
Roy's research was principally based on pion dynamics and hadron interactions.<ref name="Brief Profile of the Awardee">{{Cite web |url=http://ssbprize.gov.in/content/Detail.aspx?AID=488 |title=Brief Profile of the Awardee |date=2017 |publisher=Shanti Swarup Bhatnagar Prize |access-date=12 November 2016}}</ref> His work on [[axiomatic quantum field theory]] assisted him to develop an exact [[integral equation]] which later came to be known as ''Roy's equations'', and many scientists opined that the equation helped in pion–pion data analysis.<ref name="Research Highlights">{{Cite web |url=http://theory.tifr.res.in/~shasanka/highlights06.pdf |title=Research Highlights |date=2017 |publisher=Tata Institute of Fundamental Research}}</ref> Roy furthered the studies of Andre Martin on high-energy bounds and the observations of [[John Stewart Bell]] regarding [[Einstein-Podolsky-Rosen paradox]]; his work on the former resulted in the development of ''Roy-Singh bounds'' (unitarity bounds on high-energy cross sections) and the studies on the latter evolved into ''Roy-Singh multiparticle Bell inequalities'' and ''Auberson-Mahoux-Roy-Singh Bell inequalities''.<ref name="Indian fellow" /> He developed the theme further by proposing ''Roy's multipartite separability inequalities''. Another area of his research was the [[Chandrasekhar limit]] and the critical mass of [[boson]] systems, and Roy collaborated with Andre Martin to propose a proof for the relativistic collapse of ''M<sub>cr</sub>'' critical mass. ''Dhar-Grover-Roy super-Zeno algorithm'', for use in ''suppressing the transitions of a quantum mechanical system'',<ref name="Preserving Quantum States : A Super-Zeno Effect">{{Cite journal |last=Deepak Dhar, Lov K. Grover, Shasanka M. Roy |title=Preserving Quantum States : A Super-Zeno Effect |journal=Physical Review Letters |date=2006 |volume=96 |issue=10 |page=100405 |doi=10.1103/PhysRevLett.96.100405|pmid=16605715 |bibcode=2006PhRvL..96j0405D }}</ref> ''Roy-Braunstein's quantum metrology'', a precision measurement protocol,<ref name="Exponentially Enhanced Quantum Metrology">{{Cite journal |last=S. M. Roy, Samuel L. Braunstein |title=Exponentially Enhanced Quantum Metrology |journal=Physical Review Letters |date=2008 |volume=100 |issue=22 |page=220501 |doi=10.1103/PhysRevLett.100.220501|pmid=18643409 |arxiv=quant-ph/0607152 |bibcode=2008PhRvL.100v0501R |s2cid=7979719 }}</ref> and his elucidation of [[Pomeranchuk's theorem]] and its violations are some of his other major contributions.<ref name="Handbook of Shanti Swarup Bhatnagar Prize Winners">{{cite web | url=http://www.csirhrdg.res.in/ssb.pdf | title=Handbook of Shanti Swarup Bhatnagar Prize Winners | publisher=Council of Scientific and Industrial Research | date=1999}}</ref> His studies have been documented by way of a number of articles<ref name="Browse by Fellow">{{Cite web |url=http://repository.ias.ac.in/view/fellows/Roy=3AShasanka_Mohan=3A=3A.html |title=Browse by Fellow |date=2017 |publisher=Indian Academy of Sciences}}</ref>{{Refn|group=note|Please see ''Selected bibliography'' section}} and [[ResearchGate]], an online repository of scientific articles, has listed 105 of them.<ref name="On ResearchGate">{{Cite web |url=https://www.researchgate.net/profile/Shasanka_Roy/publications |title=On ResearchGate |date=2017 }}</ref> Besides, he has published a book, ''Advances in High Energy Physics'',<ref name="RoySingh1973">{{cite book|author1=S. M. Roy|author2=Virendra Singh|title=Advances in High Energy Physics|url=https://books.google.com/books?id=lqxTvgAACAAJ|date=1973|publisher=Tata Institute of Fundamental Research}}</ref> along with [[Virendra Singh (physicist)|Virendra Singh]], and his work has drawn citations from other scientists.<ref name="Lam2010">{{cite book|author=T.Y. Lam|title=Serre's Problem on Projective Modules|url=https://books.google.com/books?id=7K-h_v_JPf8C&pg=PA366|date=17 May 2010|publisher=Springer Science & Business Media|isbn=978-3-540-34575-6|pages=366–}}</ref><ref name="Mitra2009">{{cite book|author=Asoke Nath Mitra|title=India in the World of Physics: Then and Now|url=https://books.google.com/books?id=hRLPM6s7hWAC&pg=PA78|year=2009|publisher=Pearson Education India|isbn=978-81-317-1579-6|pages=78–}}</ref>

Roy initiated the ''Theoretical Physics Seminar Circuit'' (TPSC) of the [[Department of Science and Technology (India)|Department of Science and Technology]] (DST) at Tata Institute of Fundamental Research.<ref name="Indian fellow" /> He has conducted lecture courses for DST at CSIR-Structural Engineering Research Centre institutions and served as the expert member at the senate of the [[Indian Institute of Technology, Bombay]] in 1997. Roy was the principal Indian investigator of the Indo-French Centre for the Promotion of Advanced Research (IFCPAR/CEFIPRA)-funded project on ''Rigorous Results on Schroedinger Equations and Foundations of Quantum Theory and Applications to Particle physics and Astrophysics'' during 1999–2002.<ref name="Curriculum vitae on TIFR" />

== Awards and honors ==
The Council of Scientific and Industrial Research awarded Roy the [[Shanti Swarup Bhatnagar Prize]], one of the highest Indian science awards in 1981'<ref name="CSIR list of Awardees">{{Cite web |url=http://www.csir.res.in/careeraward/prize-winner-indexdiscipline-wise |title=CSIR list of Awardees |date=2017 |publisher=Council of Scientific and Industrial Research}}</ref> The [[Indian Academy of Sciences]] elected him as a fellow in 1982<ref name="Fellow profile">{{Cite web |url=http://www.ias.ac.in/describe/fellow/Roy,_Prof._Shasanka_Mohan |title=Fellow profile |date=2017 |publisher=Indian Academy of Sciences}}</ref> and he became of fellow of the [[Indian National Science Academy]] in 1989.<ref name="INSA Year Book 2016">{{Cite web |url=http://www.insaindia.res.in/pdf/YearBook_2016.pdf |title=INSA Year Book 2016 |date=2017 |publisher=Indian National Science Academy}}</ref> The other major Indian science academy, [[National Academy of Sciences, India]] made him their fellow in 1993<ref name="NASI Year Book 2015">{{Cite web |url=http://www.nasi.org.in/Year%20Book%202015.pdf |title=NASI Year Book 2015 |date=2017 |publisher=National Academy of Sciences, India}}</ref> and [[The World Academy of Sciences]] elected Roy as a fellow in 2002.<ref name="TWAS fellow">{{Cite web |url=https://twas.org/member/roy-shasanka-mohan |title=TWAS fellow |date=2017 |publisher=The World Academy of Sciences}}</ref> In 2003, [[Indian Science Congress Association]] selected him for the S. N. Bose Birth Centenary Gold Medal.<ref name="Indian fellow" />

== Selected bibliography ==
=== Books ===
* {{cite book|author1=S. M. Roy|author2=Virendra Singh|title=Advances in High Energy Physics|date=1973|publisher=Tata Institute of Fundamental Research}}

=== Articles ===
* {{Cite journal |last=S. M. Roy |title=Maximally Causal Quantum Mechanics |journal=Pramana |date=1998 |volume=51 |issue=5 |pages=597–602 |doi=10.1007/BF02827451|arxiv=quant-ph/9811047 |bibcode=1998Prama..51..597R |s2cid=16787218 }}
* {{Cite journal |last=S. M. Roy, Veerendra Singh |title=Maximally Realistic Causal Quantum Mechanics |journal=Physics Letters A |date=1999 |volume=255 |issue=4–6 |pages=201–208 |doi=10.1016/S0375-9601(99)00186-3|arxiv=quant-ph/9811041 |bibcode=1999PhLA..255..201R |s2cid=1626474 }}
* {{Cite journal |last=Deepak Dhar, Lov K. Grover, Shasanka M. Roy |title=Preserving Quantum States : A Super-Zeno Effect |journal=Physical Review Letters |date=2006 |volume=96 |issue=10 |page=100405 |doi=10.1103/PhysRevLett.96.100405|pmid=16605715 |bibcode=2006PhRvL..96j0405D }}
* {{Cite journal |last=S. M. Roy, Samuel L. Braunstein |title=Exponentially Enhanced Quantum Metrology |journal=Physical Review Letters |date=2008 |volume=100 |issue=22 |page=220501 |doi=10.1103/PhysRevLett.100.220501|pmid=18643409 |arxiv=quant-ph/0607152 |bibcode=2008PhRvL.100v0501R |s2cid=7979719 }}
* {{Cite journal |last=S. M. Roy |title=Exact Quantum Correlations of Conjugate Variables From Joint Quadrature Measurements |journal=Physics Letters A |date=2013 |volume=377 |issue=34–36 |pages=2011–2015 |doi=10.1016/j.physleta.2013.07.003|arxiv=1305.0410 |bibcode=2013PhLA..377.2011R |s2cid=118390430 }}
* {{Cite journal |last=André Martin, S. M. Roy |title=Froissart bound on inelastic cross section without unknown constants |journal=Physical Review D |date=2015 |volume=91 |issue=7 |page=076006 |doi=10.1103/PhysRevD.91.076006|arxiv=1503.01261 |bibcode=2015PhRvD..91g6006M |s2cid=56316392 }}

== See also ==
{{Portal|India|Physics}}
{{Div col|colwidth=30em}}
* [[Bell's theorem]]
* [[Subrahmanyan Chandrasekhar]]
* [[Satyendra Nath Bose]]
* [[Virendra Singh (physicist)]]
{{div col end}}

== Notes ==
{{reflist|group=note|2}}

== References ==
{{reflist}}

== External links ==
* {{Cite web |url=http://www.ias.ac.in/listing/bibliography/pram/Shasanka_Mohan_Roy |title=Shasanka Mohan Roy on Pramana |date=2017 |publisher=Indian Academy of Sciences |work=Author profile}}
* {{Cite web |url=http://www.mathpubs.com/author/Shasanka+Mohan+Roy |title=Shasanka Mohan Roy on MathPubs |date=2017 |publisher=MathPubs |work=Author profile |access-date=2017-04-27 |archive-url=https://web.archive.org/web/20170428051056/http://www.mathpubs.com/author/Shasanka+Mohan+Roy |archive-date=2017-04-28 |url-status=dead }}
* {{Cite web |url=http://theory.tifr.res.in/~shasanka/ |title=Shasanka Mohan Roy |date=2017 |publisher=Tata Institute of Fundamental Research |work=Home page}}
* {{Cite web |url=http://theory.tifr.res.in/~shasanka/publist06.pdf |title=List of Publications |date=2017 |publisher=Tata Institute of Fundamental Research}}

{{SSBPST recipients in Physical Science}}
{{authority control}}

{{DEFAULTSORT:Roy, Shasanka Mohan}}
[[Category:1941 births]]
[[Category:Scientists from Delhi]]
[[Category:University of Delhi alumni]]
[[Category:Princeton University alumni]]
[[Category:University of California, San Diego alumni]]
[[Category:Indian scientific authors]]
[[Category:Fellows of the Indian Academy of Sciences]]
[[Category:Indian quantum physicists]]
[[Category:Tata Institute of Fundamental Research faculty]]
[[Category:People associated with CERN]]
[[Category:University of Lausanne faculty]]
[[Category:Syracuse University faculty]]
[[Category:University of Alberta faculty]]
[[Category:Academics of the University of York]]
[[Category:Recipients of the Shanti Swarup Bhatnagar Award in Physical Science]]
[[Category:Fellows of the Indian National Science Academy]]
[[Category:Fellows of The National Academy of Sciences, India]]
[[Category:TWAS fellows]]
[[Category:20th-century Indian physicists]]
[[Category:Living people]]

Shasanka Mohan Roy - Revision history

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