Universal Luttinger-Liquid excitations of a strong-leg spin ladder

Quantum field theory provides us with analytic predictions stating that the low-energy properties of any gapless 1D spin systems are universal, regardless of the underlying...量子场论（Quantum Field Theory）为我们提供了解析性预言：任意无隙一维自旋系统（gapless 1D spin systems）的低能性质均具有普适性，而与其基底……