论文标题
长寿命声子的量子机电界面
A quantum electromechanical interface for long-lived phonons
论文作者
论文摘要
在量子状态下控制长寿命的机械振荡器具有量子信息处理的承诺。在这里，我们提出了一个机电系统，该系统能够在硅启用平台中在GHz频带中运行。依靠基于静电场和基于TIN超级电阻器的高防潮的微波腔的新型驾驶方案，我们能够演示$ {g/2π} = 1.1 $ MHz的参数增强的机电耦合，足以与$ \ \ \ calcal coolage cooperative comploce coopertime complative cool cool coopime。我们平台中缺少压电材料会导致较长的机械寿命，从而找到高达$τ_\ text {d} = 265〜μ $ s（$ q = 8.4 \ times {10}^6 $ at $ω__\ mathrm {m Mathrm {m}/2π= 5 $ ghz）的数量和米尔克元数的数字。尽管具有强大的参数驱动器，但我们通过执行侧带温度测量测量，在量子基础状态下发现空腔机械系统。同时实现了基础状态操作，较长的机械寿命和强耦合，为在混合量子系统中使用硅机电谐振器作为记忆元素和换能器，为探测量子损失的起源而奠定了阶段。
Controlling long-lived mechanical oscillators in the quantum regime holds promises for quantum information processing. Here, we present an electromechanical system capable of operating in the GHz-frequency band in a silicon-on-insulator platform. Relying on a novel driving scheme based on an electrostatic field and high-impedance microwave cavities based on TiN superinductors, we are able to demonstrate a parametrically-enhanced electromechanical coupling of ${g/2 π} = 1.1$ MHz, sufficient to enter the strong-coupling regime with a cooperativity of $\mathcal{C} = 1200$. The absence of piezoelectric materials in our platform leads to long mechanical lifetimes, finding intrinsic values up to $τ_\text{d} = 265~ μ$s ($Q = 8.4 \times {10}^6$ at $ω_\mathrm{m}/2π= 5$ GHz) measured at low-phonon numbers and millikelvin temperatures. Despite the strong parametric drives, we find the cavity-mechanics system in the quantum ground state by performing sideband thermometry measurements. Simultaneously achieving ground-state operation, long mechanical lifetimes, and strong coupling sets the stage for employing silicon electromechanical resonators as memory elements and transducers in hybrid quantum systems, and as a tool for probing the origins of acoustic loss in the quantum regime.
