Title: Enhanced quantum state transfer via feedforward cancellation of optical phase noise Show Chinese title

Title: 通过前馈消除光学相位噪声增强量子态传输

Abstract: Many experimental platforms for quantum science depend on state control via laser fields. Frequently, however, the control fidelity is limited by optical phase noise. This is exacerbated in stabilized laser systems where high-frequency phase noise is an unavoidable consequence of feedback. Here we implement an optical feedforward technique to suppress laser phase noise in the STIRAP state transfer of ultracold RbCs molecules, across 114 THz, from a weakly bound Feshbach state to the rovibrational ground state. By performing over 100 state transfers on single molecules, we measure a significantly enhanced transfer efficiency of 98.7(1)% limited only by available laser intensity. Show Chinese abstract

Abstract: 许多量子科学实验平台依赖于通过激光场实现的态控制。然而，通常情况下，控制保真度受到光学相位噪声的限制。在稳定的激光系统中，高频相位噪声是反馈不可避免的结果，这使得情况更加恶化。在这里，我们实现了光学前馈技术来抑制超冷RbCs分子在STIRAP态转移中的激光相位噪声，在114 THz的频段内，从弱束缚的Feshbach态转移到振转基态。通过对单个分子进行超过100次态转移，我们测量到的转移效率高达98.7(1)%，这一结果仅受限于可用的激光强度。