Detecting phonon blockade with photons
Detecting phonon blockade with photons
复制标题
DOI：
10.1103/physrevb.84.054503
复制
发表时间：
2011-08-04
影响因子：
3.7
通讯作者：
Fazio, Rosario
中科院分区：
文献类型：
--
作者：
Didier, Nicolas;Pugnetti, Stefano;Fazio, Rosario
当涉及很少声子时，测量机械系统的量子动力学仍然是一个挑战。我们表明，一个超导微波谐振器线性耦合到机械模式构成了一个非常强大的探针在这个范围内。通过调节栅极电压，这种新的耦合可以比通常的辐射压力相互作用强得多。我们重点研究了声子阻塞的检测，表明它可以通过测量腔内光的统计量来观察到。其根本原因是两个谐振器之间形成了纠缠态。我们的方案实现了声子约瑟夫森结，产生声子和光子之间的相干振荡，以及小于临界值的耦合的自捕获状态。从自捕获到振荡状态的转变也是由耗散动态诱导的。
Measuring the quantum dynamics of a mechanical system, when few phonons are involved, remains a challenge. We show that a superconducting microwave resonator linearly coupled to the mechanical mode constitutes a very powerful probe for this scope. This new coupling can be much stronger than the usual radiation pressure interaction by adjusting a gate voltage. We focus on the detection of phonon blockade, showing that it can be observed by measuring the statistics of the light in the cavity. The underlying reason is the formation of an entangled state between the two resonators. Our scheme realizes a phonotonic Josephson junction, giving rise to coherent oscillations between phonons and photons as well as a self-trapping regime for a coupling smaller than a critical value. The transition from the self-trapping to the oscillating regime is also induced dynamically by dissipation.