Mechanical systems at the quantum level A number of platforms are being pursued for developing technologies that exploit the enhanced sensing and measurement capabilities of quantum mechanics. Hybrid systems offer the flexibility of combining and optimizing different platforms. Hong et al. combined optomechanical control of motion and single-phonon counting techniques to probabilistically generate a single-phonon Fock state within a nanomechanical resonator. Chu et al. used electromechanical coupling to address a bulk piezoelectric resonator with a superconducting quantum circuit. Both approaches hold promise for developing hybrid quantum technologies. Science, this issue p. 203, p. 199 Single-phonon states can be electrically stored and retrieved in a piezoelectric resonator. Mechanical objects have important practical applications in the fields of quantum information and metrology as quantum memories or transducers for measuring and connecting different types of quantum systems. The field of electromechanics is in pursuit of a robust and highly coherent device that couples motion to nonlinear quantum objects such as superconducting qubits. Here, we experimentally demonstrate a high-frequency bulk acoustic wave resonator that is strongly coupled to a superconducting qubit using piezoelectric transduction with a cooperativity of 260. We measure qubit and mechanical coherence times on the order of 10 microseconds. Our device requires only simple fabrication methods and provides controllable access to a multitude of phonon modes. We demonstrate quantum control and measurement on gigahertz phonons at the single-quantum level.

中文翻译：

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具有超导量子位的量子声学

量子级的机械系统 正在开发许多平台来开发利用量子力学增强的传感和测量能力的技术。混合系统提供了组合和优化不同平台的灵活性。洪等人。结合运动的光机械控制和单声子计数技术，在纳米机械谐振器内概率性地生成单声子 Fock 状态。楚等人。使用机电耦合来解决具有超导量子电路的体压电谐振器。这两种方法都有望开发混合量子技术。科学，这个问题 p。203，第。199 单声子状态可以在压电谐振器中进行电存储和检索。机械物体作为量子存储器或换能器，用于测量和连接不同类型的量子系统，在量子信息和计量学领域具有重要的实际应用。机电领域正在寻求一种强大且高度相干的设备，该设备将运动耦合到非线性量子对象，例如超导量子位。在这里，我们通过实验演示了一种高频体声波谐振器，该谐振器使用协同性为 260 的压电转换与超导量子位强耦合。我们测量了 10 微秒数量级的量子位和机械相干时间。我们的设备只需要简单的制造方法，并提供对多种声子模式的可控访问。