Can the displacemon device test objective collapse models?
Can the displacemon device test objective collapse models?
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DOI：
10.1116/5.0073626
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发表时间：
2021-10
期刊：
影响因子：
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通讯作者：
Lydia A. Kanari-Naish;Jack Clarke;M. Vanner;E. Laird
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文献类型：
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作者：
Lydia A. Kanari-Naish;Jack Clarke;M. Vanner;E. Laird
测试量子力学适用性的极限将加深我们对宇宙的理解，并可能揭示量子力学和引力之间的相互作用。目前，有一个广泛的方法，这样的宏观测试跨越从大分子的物质波干涉测量的精确测量的加热速率的运动中的微尺度杠杆。“displacemon”是一种拟议的机电设备，由一个机械谐振器组成，该谐振器与超导量子位磁通耦合，能够产生和读出机械量子态。在最初的提议中，机械谐振器是一个碳纳米管，含有10^6 $核子。在这里，为了在更宏观的尺度上探索量子力学，我们建议在两个更大的质量尺度上使用铝机械谐振器，一个是马歇尔-西蒙-彭罗斯-鲍梅斯特移动镜提议的启发，另一个是普朗克质量。对于这样一个设备，我们检查所需的实验要求进行更宏观的量子测试，从而切实可行地检测到退相干效应预测的两个客观的崩溃模型：Di\'{o} si-彭罗斯和连续自发本地化。我们测试这两种理论的协议利用了displacemon架构来创建与环境不平衡的非高斯机械状态，然后分析超导量子位的测量统计数据。我们发现，随着这些机电设备的制造和振动灵敏度的改进，displacemon设备提供了一种新的途径，可以超越标准量子理论，可行地测试退相干机制。
Testing the limits of the applicability of quantum mechanics will deepen our understanding of the universe and may shed light on the interplay between quantum mechanics and gravity. At present there is a wide range of approaches for such macroscopic tests spanning from matter-wave interferometry of large molecules to precision measurements of heating rates in the motion of micro-scale cantilevers. The"displacemon"is a proposed electromechanical device consisting of a mechanical resonator flux-coupled to a superconducting qubit enabling generation and readout of mechanical quantum states. In the original proposal, the mechanical resonator was a carbon nanotube, containing $10^6$ nucleons. Here, in order to probe quantum mechanics at a more macroscopic scale, we propose using an aluminium mechanical resonator on two larger mass scales, one inspired by the Marshall-Simon-Penrose-Bouwmeester moving-mirror proposal, and one set by the Planck mass. For such a device, we examine the experimental requirements needed to perform a more macroscopic quantum test and thus feasibly detect the decoherence effects predicted by two objective collapse models: Di\'{o}si-Penrose and continuous spontaneous localization. Our protocol for testing these two theories takes advantage of the displacemon architecture to create non-Gaussian mechanical states out of equilibrium with their environment and then analyzing the measurement statistics of a superconducting qubit. We find that with improvements to the fabrication and vibration sensitivities of these electromechanical devices, the displacemon device provides a new route to feasibly test decoherence mechanisms beyond standard quantum theory.