AI 中文总结
该研究提出在由两个旋转谐振器与纳米机械振荡器近场耦合的二次光机械系统中实现非互易声子阻塞的方案，利用萨尼亚克 - 菲佐效应及光学弹簧效应，通过设置参数实现不同方向的单双声子共振，量化非互易性，揭示热效应，为相关器件及应用提供途径。
AI 中文摘要
我们提出了一种在由两个与纳米机械振荡器近场耦合的旋转谐振器组成的二次光机械（QOM）系统中实现非互易声子阻塞的方案。由于萨尼亚克 - 菲佐效应，沿相反方向传播的泵浦场经历不同的有效失谐，从而导致腔内强度不对称。通过光学弹簧效应，这种强度不平衡导致有效机械频率的方向依赖性偏移，这是非互易声子阻塞的核心机制。通过明智地设置参数，单声子共振激发在一个泵浦方向上导致传统的声子阻塞，而双声子共振在另一个方向上促进声子诱导隧穿（PIT）。声子二阶相关函数中的对比度超过55 dB量化了明显的非互易性。为了阐明非互易统计，从相干分量和压缩涨落之间的干涉方面进一步分析了声子阻塞。纳入热声子后，我们揭示了一种扩展的非互易热效应，其中热噪声增加在一个方向上使反聚束向泊松统计退化，但在相反方向上使统计从聚束反转到反聚束。我们这项工作为非互易声子器件和定向声子开关提供了一条途径，在手性网络和声子信息处理中有潜在应用。
英文摘要
We propose a scheme for achieving nonreciprocal phonon blockade in a quadratic optomechanical (QOM) system consisting of two spinning resonators near-field coupled to a nanomechanical oscillator. Due to the Sagnac-Fizeau effect, pump fields propagating in opposite directions experience distinct effective detunings,thereby leading to asymmetric intracavity intensities. Through the optical spring effect, this intensity imbalance gives rise to direction-dependent shifts in the effective mechanical frequency, providing the core mechanism for nonreciprocal phonon blockade. By judiciously setting parameters, single-phonon resonant excitation leads to conventional phonon blockade for one pump direction, whereas two-phonon resonance facilitates phononinduced tunneling (PIT) for the other. The pronounced nonreciprocity is quantified by a contrast ratio in the phonon second-order correlation function exceeding 55 dB. To elucidate the nonreciprocal statistics, the phonon blockade is further analyzed in terms of interference between the coherent component and squeezed fluctuations. Incorporating thermal phonons, we reveal an extended nonreciprocal thermal effect, where increasing thermal noise degrades antibunching toward Poissonian statistics in one direction, yet reverses the statistics from bunching to antibunching in the opposite direction. Our work provides a pathway toward nonreciprocal phonon devices and directional phonon switches, with potential applications in chiral networks and phononic information processing.
Comments13 pages, 6 figures
Journal refPhysical Review A 114, 013701 (2026)
