Venezuelan-born theoretical physicist
Freddy Alexander Cachazo is a Venezuelan -born theoretical physicist who holds the Gluskin Sheff Freeman Dyson Chair in Theoretical Physics at the Perimeter Institute for Theoretical Physics in Waterloo , Ontario , Canada .
He is known for the contributions to quantum field theory through the study of scattering amplitudes , in particular in quantum chromodynamics , N = 4 supersymmetric Yang–Mills theory and quantum gravity . His contributions include BCFW recursion relations , the CSW vertex expansion and the amplituhedron . In 2014, Cachazo was awarded the New Horizons Prize [ 1] for uncovering numerous structures underlying scattering amplitudes in gauge theories and gravity .[ 2]
Academic career
After graduating from Simón Bolívar University in 1996, Cachazo attended a year-long Postgraduate Diploma Programme at the International Centre for Theoretical Physics (ICTP) in Trieste , Italy .[ 3] He was admitted in Harvard University , where he completed the Ph.D. under the supervision of Cumrun Vafa in 2002.[ 4]
Cachazo was a post-doctoral member of the Institute for Advanced Study (IAS) in Princeton , New Jersey in 2002-05 and 2009-10.[ 5] In 2005, he became a faculty member at the Perimeter Institute for Theoretical Physics in Waterloo , Ontario , Canada , as well as an Adjoint Faculty at the nearby University of Waterloo .[ 6] He currently holds the Gluskin Sheff Freeman Dyson Chair in Theoretical Physics.[ 7]
Cachazo's research concerns quantum field theory , the underlying theory describing fundamental interactions of particles and space-time itself. The research program is to understand their deep structure through the study of scattering amplitudes . Such understanding allows for both efficient computation of the probabilities of physical processes occurring and insights into the unknown structures of the gauge theories and gravity .
Together with Ruth Britto , Bo Feng and Edward Witten , he introduced the recursion relations for the computation of scattering amplitudes , which opened a new window for computations required at particle accelerators, such as the Large Hadron Collider . With Nima Arkani-Hamed and collaborators, he studied N = 4 supersymmetric Yang–Mills theory and showed how to compute amplitudes at any order in the perturbation theory . He co-discovered a new formalism unifying gauge theory and gravity in any space-time dimension, known as the Cachazo-He-Yuan formulation.
Awards and honors
In 2009, he was awarded the Gribov Medal for an outstanding work by a young physicist from the European Physical Society .[ 8] Two year later he won the Rutherford Medal ,[ 9] an equivalent prize awarded by the Royal Society of Canada . In 2012, Canadian Association of Physicists awarded Cachazo with the Herzberg Medal .[ 10] [ 11] Finally, he won the 2014 New Horizons Prize ,[ 1] [ 2] which by many is regarded to be the most prestigious award for young theoretical physicists.
Selected publications
Britto, Ruth; Cachazo, Freddy; Feng, Bo; Witten, Edward (2005). "Direct proof of tree-level recursion relation in Yang-Mills theory". Phys. Rev. Lett . 94 (181602): 181602. arXiv :hep-th/0501052 . Bibcode :2005PhRvL..94r1602B . doi :10.1103/PhysRevLett.94.181602 . PMID 15904356 . S2CID 10180346 .
Britto, Ruth; Cachazo, Freddy; Feng, Bo (2005). "Generalized unitarity and one-loop amplitudes in N=4 super-Yang-Mills". Nucl. Phys . B725 (275–305): 275–305. arXiv :hep-th/0412103 . Bibcode :2005NuPhB.725..275B . doi :10.1016/j.nuclphysb.2005.07.014 . S2CID 11653681 .
Arkani-Hamed, Nima; Cachazo, Freddy; Kaplan, Jared (2010). "What is the Simplest Quantum Field Theory?". JHEP . 1009:016 (9): 16. arXiv :0808.1446 . Bibcode :2010JHEP...09..016A . doi :10.1007/JHEP09(2010)016 . S2CID 118407741 .
Cachazo, Freddy; Svrcek, Peter; Witten, Edward (2004). "MHV vertices and tree amplitudes in gauge theory". JHEP . 2004 (9): 006. arXiv :hep-th/0403047 . Bibcode :2004JHEP...09..006C . doi :10.1088/1126-6708/2004/09/006 . S2CID 16328643 .
Arkani-Hamed, Nima; Bourjaily, Jacob L.; Cachazo, Freddy; Caron-Huot, Simon (2011). "The All-Loop Integrand For Scattering Amplitudes in Planar N=4 SYM". JHEP . 1101:041: 41. arXiv :1008.2958 . Bibcode :2011JHEP...01..041A . doi :10.1007/JHEP01(2011)041 . S2CID 8746937 .
Arkani-Hamed, Nima; Bourjaily, Jacob L.; Cachazo, Freddy; Goncharov, Alexander B. ; Postnikov, Alexander; Trnka, Jaroslav (2012). "Scattering Amplitudes and the Positive Grassmannian". arXiv :1212.5605 [hep-th ].
Arkani-Hamed, Nima; Cachazo, Freddy; Cheung, Clifford; Kaplan, Jared (2010). "A Duality For The S Matrix". JHEP . 1003:020 (3): 20. arXiv :0907.5418 . Bibcode :2010JHEP...03..020A . doi :10.1007/JHEP03(2010)020 . S2CID 5771375 .
Cachazo, Freddy; He, Song; Yuan, Ellis Ye (2014). "Scattering of Massless Particles in Arbitrary Dimensions". Phys. Rev. Lett . 113 (171601): 171601. arXiv :1307.2199 . Bibcode :2014PhRvL.113q1601C . doi :10.1103/PhysRevLett.113.171601 . PMID 25379910 . S2CID 5970885 .
Cachazo, Freddy; Strominger, Andrew (2014). "Evidence for a New Soft Graviton Theorem". arXiv :1404.4091 [hep-th ].
References
International National Academics Other