Speaker: Dr. Gang Yang (Humboldt University)

Time: 4:00PM, Nov. 18th (Wednesday)

Place: Theoretical Physics Division，319

Abstract:

Single trace operators in gauge theories may be related to some spin chain models. For example, the anomalous dilatation operator (or anomalous dimension) is mapped to the spin chain Hamiltonian (or energy). In some cases, the spin chain models may be exactly solvable, thus can be used to understand the non-perturbative dynamics of gauge theories. This idea has played a significant role in understanding the N=4 SYM as well as the AdS/CFT correspondence. In this talk the speaker will describe how to obtain the dilation operator via modern spinor helicity and unitarity on-shell methods for arbitrary single trace operators, providing an explicit two-loop example in N=4 SYM. This method is not limited to N=4 SYM but may be applied to general gauge theories.