可扩展的声子-激光器阵列与自组织同步
Scalable phonon-laser arrays with self-organized synchronization
AI总结：
本文提出通过局部驱动在量子多体Ising-like自旋链中生成可扩展的可寻址声子激光器，实现自组织同步和全局相位锁定，克服了传统声子激光器的可扩展性和耦合限制。
摘要：
量子机械振荡器在GHz范围内运作时，已被预测支持声子激光——当有效增益超过内在损耗时，自维持的相干振动运动出现。当前声子激光器提案面临两个关键限制，即缺乏可扩展性和依赖于将所有振荡器耦合到共同场，这显著限制了灵活性并阻止了在特定位置的按需声子激光。鉴于许多应用和理论洞察自然源于可扩展的多体系统，解决这些限制是及时的。在本文中，我们展示了如何通过局部驱动在量子多体Ising-like自旋链中生成可扩展的可寻址声子激光器阵列。我们严格确立了机械振荡器从热运动转为持续相干自振荡的共振条件。与以往依赖共同耦合总线的方法不同，我们的方案采用纯粹的本地驱动，产生一种本质上模块化和可扩展的架构，非常适合集成到大规模量子系统中。此外，我们的方法通过简单地开关自旋-机械耦合相互作用，使在特定位置的按需激光成为可能，只要满足特定的共振条件。值得注意的是，我们的声子激光器阵列对共振不匹配具有鲁棒性，并且在共振附近自然表现出成对的自组织同步和全局相位锁定。最后，我们概述了在当前实验能力内的实验实现。
英文摘要：
Quantum mechanical oscillators operating at frequencies up to the GHz regime have been predicted to support phonon lasing -- self-sustained coherent vibrational motion emerging when the effective gain exceeds intrinsic losses. Current phonon-laser proposals face two key limitations, namely: they lack scalability and rely on coupling all oscillators to a common field, which significantly restricts flexibility and prevents selective, on-demand phonon lasing at specific locations. Given that numerous applications and theoretical insights naturally emerge from scalable many-body systems, addressing these limitations is timely. In this Letter, we demonstrate how scalable arrays of individually addressable phonon lasers can be generated through local driving in a quantum many-body Ising-like spin chain. We rigorously establish the resonance conditions under which mechanical oscillators transition from thermal motion to sustained coherent self-oscillation. Unlike previous approaches that rely on a common coupling bus, our proposal employs purely local driving, resulting in an inherently modular and scalable architecture ideally suited for integration into large-scale quantum systems. Additionally, our approach enables on-demand lasing of individual mechanical oscillators at specific sites by simply switching the spin-mechanical coupling interaction on and off, provided specific resonance conditions are satisfied. Notably, our phonon laser array is robust against resonance mismatches and naturally exhibits both pairwise self-organized synchronization and global phase locking near resonance. Finally, we outline an experimental implementation within current experimental capabilities.
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