Advanced Science Institute, The Institute of Physical and Chemical Research (RIKEN), Wako-shi, Saitama 351-0198, Japan.
Phys Rev Lett. 2009 Oct 2;103(14):147003. doi: 10.1103/PhysRevLett.103.147003. Epub 2009 Sep 28.
We investigate the dynamical Casimir effect in a coplanar waveguide (CPW) terminated by a superconducting quantum interference device (SQUID). Changing the magnetic flux through the SQUID parametrically modulates the boundary condition of the CPW, and thereby, its effective length. Effective boundary velocities comparable to the speed of light in the CPW result in broadband photon generation which is identical to the one calculated in the dynamical Casimir effect for a single oscillating mirror. We estimate the power of the radiation for realistic parameters and show that it is experimentally feasible to directly detect this nonclassical broadband radiation.
我们研究了在由超导量子干涉器件（SQUID）终止的共面波导（CPW）中动态 Casimir 效应。通过改变 SQUID 中的磁通量，可以参数化地调制 CPW 的边界条件，从而改变其有效长度。与 CPW 中光速相当的有效边界速度会导致宽带光子产生，这与单个振荡镜的动态 Casimir 效应中计算出的结果相同。我们根据实际参数估计了辐射功率，并表明直接检测这种非经典宽带辐射在实验上是可行的。
