Title: Coherent spin-phonon scattering in facilitated Rydberg lattices Show Chinese title

Title: 在促进的里德伯格晶格中的相干自旋-声子散射

Abstract: We investigate the dynamics of a spin system with facilitation constraint that can be studied using Rydberg atoms in arrays of optical tweezer traps. The elementary degrees of freedom of the system are domains of Rydberg excitations that expand ballistically through the lattice. Due to mechanical forces, Rydberg excited atoms are coupled to vibrations within their traps. At zero temperature and large trap depth, it is known that virtually excited lattice vibrations only renormalize the timescale of the ballistic propagation. However, when vibrational excitations are initially present -- i.e., when the external motion of the atoms is prepared in an excited Fock state, coherent state or thermal state -- resonant scattering between spin domain walls and phonons takes place. This coherent and deterministic process, which is free from disorder, leads to a reduction of the power-law exponent characterizing the expansion of spin domains. Furthermore, the spin domain dynamics is sensitive to the coherence properties of the atoms' vibrational state, such as the relative phase of coherently superimposed Fock states. Even for a translationally invariant initial state the latter manifests macroscopically in a phase-sensitive asymmetric expansion. Show Chinese abstract

Abstract: 我们研究了一个具有促进约束的自旋系统的动力学，该系统可以通过光学镊子阵列中的里德伯原子进行研究。 系统的基本自由度是通过晶格球面扩展的里德伯激发区域。 由于机械力， 被激发的里德伯原子与其陷阱内的振动耦合。 在零温度和大陷阱深度下，已知几乎被激发的晶格振动仅会重新调整球面传播的时间尺度。 然而，当初始存在振动激发时——即当原子的外部运动被制备在激发的福克态、相干态或热态时——自旋域壁与声子之间会发生共振散射。 这一不受无序影响的相干且确定性的过程会导致表征自旋域扩展的幂律指数减小。 此外，自旋域的动力学对原子振动态的相干性敏感，例如相干叠加的福克态之间的相对相位。 即使对于平移不变的初始状态，后者也会在宏观上表现出相位敏感的不对称扩展。