高Q微波腔中存储光子的原位频率调谐
In-situ frequency tuning of photons stored in a high Q microwave cavity
摘要：
光子是电磁场的基本激发，可以在腔中捕获。对于具有一定尺寸的给定腔，基模具有固定的频率f，其赋予光子特定的“颜色”。腔还具有典型的寿命τ，这导致有限的线宽Δ f。如果腔的大小与τ相比变化得很快，并且频率变化Δ f >> Δ f，那么就有可能改变捕获光子的“颜色”。在这里，我们展示超导微波腔，可调的有效长度。通过改变腔体一端的约瑟夫森电感来实现调谐。我们展示了在时间Δ t << tau内通过几百个线宽进行的调谐。在少光子极限下，我们证明了储存在腔中的光子在失谐后将从具有新频率的腔中泄漏出来。被测器件的特性使其适合于量子比特的动态耦合。
英文摘要：
Photons are fundamental excitations of the electromagnetic field and can be captured in cavities. For a given cavity with a certain size, the fundamental mode has a fixed frequency f which gives the photons a specific "colour". The cavity also has a typical lifetime tau, which results in a finite linewidth delta f}. If the size of the cavity is changed fast compared to tau, and so that the frequency change Delta f >> delta f, then it is possible to change the "colour" of the captured photons. Here we demonstrate superconducting microwave cavities, with tunable effective lengths. The tuning is obtained by varying a Josephson inductance at one end of the cavity. We show tuning by several hundred linewidths in a time Delta t << tau. Working in the few photon limit, we show that photons stored in the cavity at one frequency will leak out from the cavity with the new frequency after the detuning. The characteristics of the measured devices make them suitable for dynamic coupling of qubits.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
