#
Dr. Tristan Mc Loughlin

Associate Professor, Pure & Applied Mathematics

## Publications and Further Research Outputs

### Peer-Reviewed Publications

**T. Klose, T. McLoughlin, Worldsheet Form Factors in AdS/CFT , Physical Review D, 87, 2013**

**Haehnel, Philipp and McLoughlin, Tristan, Conformal Higher Spin Theory and Twistor Space Actions, Journal of Physics A: Mathematical and Theoretical, 50, (48), 2017, p485401 **

**Thomas Klose, Tristan McLoughlin, Dhritiman Nandan, Jan Plefka, Gabriele Travaglini , Double-Soft Limits of Gluons and Gravitons , Journal of High Energy Physics, 2015**

**Bargheer, T., Beisert, N., Galleas, W., Loebbert, F., McLoughlin, T., Exacting N = 4 superconformal symmetry, Journal of High Energy Physics, 2009, (11), 2009**

**Till Bargheer, Song He and Tristan McLoughlin, New Relations for Three-Dimensional Supersymmetric Scattering Amplitudes, Physical Review Letters, 108, (23), 2012, p5 **

**Klose, Thomas and McLoughlin, Tristan and Roiban, Radu and Zarembo, Konstantin, Worldsheet scattering in AdS_5 × S, 5, Journal of High Energy Physics, 2007, (3), 2007**

**McLoughlin, T., Swanson, I., N-impurity superstring spectra near the pp-wave limit, Nuclear Physics B, 702, (1-2), 2004, p86-108 **

**Tristan McLoughlin, Review of AdS/CFT Integrability, Chapter II.2: Quantum Strings in AdS_5 × S, 5, Letters in Mathematical Physics, 99, (1-3), 2012, p127-148 **

**Thomas Klose and Tristan McLoughlin, A light-cone approach to three-point functions in AdS_5 × S, 5, Journal of High Energy Physics, 2012, (4), 2012**

**McLoughlin, Tristan and Roiban, Radu, Spinning strings at one-loop in AdS(4) x P**3, JHEP, 12, 2008, p101-**

**Adamo, Tim and Hähnel, Philipp and McLoughlin, Tristan, Conformal higher spin scattering amplitudes from twistor space, JHEP, 2017, p21 **

**Callan Jr., C.G., McLoughlin, T., Swanson, I., Holography beyond the Penrose limit, Nuclear Physics B, 694, (1-2), 2004, p115-169 **

**Callan Jr., C.G., Lee, H.K., McLoughlin, T., Schwarz, J.H., Swanson, I., Wu, X., Quantizing string theory in AdS5×S5: Beyond the pp-wave, Nuclear Physics B, 673, (1-2), 2003, p3-40 **

**McLoughlin, Tristan and Nandan, Dhritiman, Multi-Soft gluon limits and extended current algebras at null-infinity, Journal of High Energy Physics, 8, 2017, p124-**

**Bargheer, Till and Beisert, Niklas and Loebbert, Florian and McLoughlin, Tristan, Conformal Anomaly for Amplitudes in N =6 Superconformal Chern-Simons Theory, Journal of Physics A, 45, (47), 2012, p25 **

**Beisert, Niklas and others, Review of AdS/CFT Integrability: An Overview, Letters in Mathematical Physics, 99, (1-3), 2012, p3-32 **

**Beisert, Niklas and Henn, Johannes and McLoughlin, Tristan and Plefka, Jan, One-Loop Superconformal and Yangian Symmetries of Scattering Amplitudes in N=4 Super Yang-Mills, JHEP, 04, 2010, p085-**

**Agarwal, A., Beisert, N., McLoughlin, T., Scattering in mass-deformed N >= 4 Chern-Simons models, Journal of High Energy Physics, 2009, (6), 2009**

**Klose, Thomas and McLoughlin, Tristan , Comments on World-Sheet Form Factors in AdS/CFT , Journal of Physics A: Mathematical and Theoretical, 47, (5), 2014**

**He, S., McLoughlin, T., On all-loop integrands of scattering amplitudes in planar N = 4 SYM, Journal of High Energy Physics, 2011, (2), 2011**

**Klose, T., McLoughlin, T., Interacting finite-size magnons, Journal of Physics A: Mathematical and Theoretical, 41, (28), 2008**

**Klose, T. and McLoughlin, T. and Minahan, J. A. and Zarembo, K., World-sheet scattering in AdS_5 × S, 5 at two loops, Journal of High Energy Physics, 2007, (8), 2007**

**McLoughlin, T., Swanson, I., Integrable twists in AdS/CFT, Journal of High Energy Physics, 2006, (8), 2006**

**McLoughlin, T., Wu, X., Kinky strings in AdS_5 × S, 5, Journal of High Energy Physics, 2006, (8), 2006**

**Lee, H.K., McLoughlin, T., Wu, X., Gauge/gravity duality for interactions of spherical membranes in 11-dimensional pp-wave, Nuclear Physics B, 728, (1-3), 2005, p1-30 **

**McLoughlin, T., Swanson, I., Open string integrability and AdS/CFT, Nuclear Physics B, 723, (1-2), 2005, p132-162 **

**Callan Jr., C.G., McLoughlin, T., Swanson, I., Higher impurity AdS/CFT correspondence in the near-BMN limit, Nuclear Physics B, 700, (1-3), 2004, p271-312 **

**Beisert, N., McLoughlin, T., Roiban, R., Four-loop dressing phase of N=4 super-Yang-Mills theory, Physical Review D - Particles, Fields, Gravitation and Cosmology, 76, (4), 2007**

**McLoughlin, T., Roiban, R., Tseytlin, A.A., Quantum spinning strings in AdS_4 × CP, 3: Testing the Bethe Ansatz proposal, Journal of High Energy Physics, 2008, (11), 2008**

**Callan Jr., C.G., Heckman, J., McLoughlin, T., Swanson, I., Lattice super-Yang-Mills: A virial approach to operator dimensions, Nuclear Physics B, 701, (1-2), 2004, p180-206 **

**Lorenzo Gerotto, Tristan McLoughlin, Diagonal Form Factors in Landau-Lifshitz Models , JHEP , 1903 (2019) 180, 2019**

### Non-Peer-Reviewed Publications

**Marianne Leitner (DIAS), Tristan McLoughlin (TCD), Werner Nahm (DIAS), Eoin Ó Colgáin (Stony Brook), Joost Slingerland (NUIM) , Irish Quantum Foundations, 27th-29th May , 2015, DIAS**

**Tristan McLoughlin, YRISW 2017, Feb 27th - Mar 3rd, 2017, TCD**

**Jon-Ivar Skullerud (Maynooth), Joost Slingerland (Maynooth), Tristan McLoughlin (TCD), Leron Borsten (DIAS), Graham Kells (DIAS) , Irish Quantum Foundations, 26-27 May, 2016, NUIM Maynooth**

**John Bulava (TCD), Tristan McLoughlin (TCD), Eoin Ó Colgáin (Stony Brook), Jon-Ivar Skullerud (NUIM), Joost Slingerland (NUIM) , Irish Quantum Foundations, May 30-31, 2014, Trinity College Dublin**

**Brian Dolan (NUIM), Tristan McLoughlin (TCD), Eoin Ó Colgáin (Oviedo), Michael Peardon (TCD), Jon-Ivar Skullerud (NUIM), Joost Slingerland (NUIM) , Irish Quantum Foundations, 3-4 May 2013, 2013, Castletown House, Ireland**

**Tristan McLoughlin, Multi-soft limits for gluon amplitudes - A symmetry algebra interpretation, Humboldt University Berlin, Jan 4th, 2017**

**Tristan Mc Loughlin, AdS/CFT and Integrability: A path to exact results in Quantum Field Theory, UCD Applied & Computational Mathematics seminar, UCD, 1st Feb, 2017, Barry Wardell**

**Tristan McLoughlin, Twistors and Conformal Higher-Spin Theory, Theory Group Seminar, Imperial College London, Nov 8th, 2016**

**Tristan McLoughlin, Twistor Theory and Conformal Higher Spin, University of Vienna, May 9th, 2017, Stefan Fredenhagen**

**Tristan McLoughlin, Symmetries of Worldsheet Form Factors, Integrable Approaches to 3pt functions workshop, Budapest, Hungary, 15 - 19 June , 2015, Zoltán Bajnok, Romuald Janik**

**Tristan McLoughlin, Twistors and Conformal Higher-Spin Theory, Queen Mary University London, Nov 10th, 2016, Marco Bianchi**

**Tristan McLoughlin, Integrable Form Factors and AdS/CFT, ISQS23, Prague, Jun 22nd - 27th, 2015, Čestmír Burdík**

**Tristan McLoughlin, Twistors and Conformal Higher Spin Theory, Higher Spin Theory and Holography, Lebedev Inst. Moscow, Dec 2nd , 2016, Ruslan Metsaev**

**Tristan McLoughlin, Form Factors in AdS/CfT, Workshop on 3-point functions in Gauge/String theories, ICTP-SAFIR, Brazil, 21 Sep, 2016, Benjamin Basso, Romuald Janik, Pedro Vieira, Zoltan Bajnok**

**Tristan McLoughlin, World-sheet form factors in AdS/CFT, Maths HEP seminars, Durham University, Feb 14th, 2014, Jonathan Pearson**

**Tristan McLoughlin, Conformal Higher Spins and Twistor Actions, Aspects of Higher Spin Theory, MIAPP, Germany, 23 May, 2016, Erdmenger, Johanna Giombi, Simone Klebanov, Igor Sachs, Ivo Vasiliev, Mikhail**

**Tristan McLoughlin, World-sheet form factors in AdS/CFT, String Seminar, Oxford, UK, Feb 24th, 2014, Philip Candelas**

**Tristan McLoughlin, World-sheet Form Factors in AdS/CFT, International Symposium Ahrenshoop, Akademie Berlin-Schmöckwitz , 25/08 to 29/08, 2014, Thomas Klose, Jan Louis, Jan Plefka, Matthias Staudacher, Stefan Theisen**

**Tristan McLoughlin, String Form Factors and Gauge Theory Correlators, Indian Strings Meeting , Puri, India, December 15-20, 2014, Sujay Ashok (IMSc), Partha Mukhopadhyay (IMSc), Sudhakar Panda (IOPB), Nemani Suryanarayana (IMSc), Amitabh Virmani (IOPB)**

**Tristan McLoughlin, Form Factors in AdS/CFT, ICFT, University of Hertfordshire, April 12 - 13, 2013, Charles Young, Benoit Vicedo.**

**Tristan McLoughlin, Worldsheet form factors in AdS/CFT, Seminar, Perimeter, Jan 8th, 2013**

**Tristan McLoughlin, Form Factors in AdS/CFT, Seminar, INFN Padova, Italy, May 29th, 2013, Dmitri Sorokin**

**Tristan McLoughlin, World-sheet Form Factors in AdS/CFT, IGST , Utrecht, 19 - 23 August , 2013, Gleb Arutyunov, Riccardo Borsato, Bernard de Wit, Alessandro Sfondrini, Stijn van Tongeren, Stefan Vandoren, N/A - N/App**

**Tristan McLoughlin, World-sheet Form Factors in AdS/CFT, North British Mathematical Physics Seminar, Durham University, 6 November, 2013, Douglas Smith**

## Research Expertise

### Description

Many of my research interests centre around the goal of developing a deeper understanding of the nonperturbative behaviour of strongly coupled gauge theories. Such theories underpin our modern description of a wide range of physical phenomena from the existence of protons and neutrons, due to confinement in quantum chromodynamics (QCD), to the fractional quantum Hall effect (FQHE) for strongly coupled electrons in two-dimensions. As these phenomena occur beyond the regime where standard perturbative approaches are applicable we have limited theoretical tools with which to develop any physical understanding and there remain a great number of profound open questions. One novel approach to these problems, which is at the heart of much of my research, is the remarkable duality between specific quantum theories of gravity, such as string theory, and gauge theories. The duality relates the weakly interacting regime of one theory to the strongly coupled regime of the dual theory. While this makes proving the duality rather difficult, it means that we can learn about strongly coupled gauge theories by considering weakly interacting string theories. Furthermore, and just as interesting, it implies we can study problems in quantum gravity through the analysis of gauge theories. A separate, but related, theme in my research has been the study of scattering amplitudes in gauge theories, including gravitational theories and, most recently, higher-spin theories. From a conceptual point of view amplitudes are interesting as gedanken experiments which can give insight into the underlying properties of a given theory. Ultimately we are looking to find a mathematical reformulation of gravity that makes the known symmetries manifest, that gives an efficient method for computation and, most optimistically, to find a useful holographic description of asymptotically flat space-times that would give a definition of quantum gravity in such spaces.### Projects

**Title****Exact Methods in Strongly Coupled Systems**

**Summary**- The overarching objective of this research project is the development of a theoretical and mathematical framework to study the nonperturbative behaviour of strongly coupled systems and to use this knowledge to understand the physics underpinning the discovery of new materials with novel properties.

**Funding Agency**- SFI

**Date From**- 1/12/2016

**Date To**- 30/11/2020

**Title****Exact methods in string and gauge theories**

**Funding Agency**- EUROPEAN COMMISSION

**Date From**- March 2013

**Date To**- March 2017

**Title****New methods in exactly solvable models**

**Funding Agency**- IRC

**Date From**- May 2014

**Date To**- April 2015

## Recognition

### Representations

**Advisory Panel of Journal of Physics A: Mathematical and Theoretical**