Families of Quasilocal Conservation Laws and Quantum Spin Transport
Families of Quasilocal Conservation Laws and Quantum Spin Transport
For fundamental integrable quantum chains with deformed symmetries we outline a general procedure for defining a continuous family of quasilocal operators whose time derivative is supported near the two boundary sites only. The program is implemented for a spin $1/2$ $XXZ$ chain, resulting in improved rigorous estimates for the high …