【摘 要】
：
The Ward identity in gauge theory constrains the behavior of the amplitudes.We discuss the Ward identity for amplitudes with a pair of shifted lines with co
【机 构】
：
NanjingUniversity,China
【出 处】
：
The XXIX International Colloquium on Group-Theoretical Metho
论文部分内容阅读
The Ward identity in gauge theory constrains the behavior of the amplitudes.We discuss the Ward identity for amplitudes with a pair of shifted lines with complex momenta.This will induce a recursion relation identical to BCFW recursion relations at the finite poles of the complexified amplitudes.Furthermore,according to the Ward identity,it is also possible to transform the boundary term into a simple form,which can be obtained by a new recursion relation.For the amplitude with one off-shell line in pure Yang-Mills theory,we find this technique is effective for obtaining the amplitude even when there are boundary contributions.
其他文献
In the standard teleportation protocol,the direct transfer of a quantum system from a sender to a receiver can be perfectly simulated by the transfer of a f
We address the general problem of transforming a quantum gate given by a unitary representation of a symmetry group into a gate given by a different represe
We reveal a correspondence between the eigenvalues of tripartite quantum states and the asymptotic behaviour of symmetric group 6j-symbols of F-matrices.Str
I will discuss ongoing joint work with L.Velazquez,R.Werner and A.Werner in the case of discrete time unitary evolutions.I hope to present some results invo
Finite Heisenberg groups are basic operator structures of finite-dimensional quantum mechanics.Their symmetries are described for single as well as arbitrar
We argue that the discrete symmetries of quantum physics combined with the superposition principle lead to the continuous symmetries in the macroscopic worl
I will explain the basic techniques to deal with a system of n qubits in phase space,which turns out to be a discrete 2n × 2n phase space.The phase space i
We describe a graphical language which enables one to reason abstractly and at the same time very intuitively about quantum phenomena.The language is univer
I will contrast two possible approaches – based on polar decomposition and on generalized Fourier transforms - to the construction of phase operators in sy
We investigate new models for a finite quantum oscillator based upon the Lie superalgebra sl(2|1),where the position and momentum operators are represented