最近[J. Haro和E. Elizalde,Phys. Rev. Lett. { \bf 97},130401(2006)]中,引入了哈密顿公式,以便解决与在反射镜移动时的所有时间的动态卡西米尔效应的物理描述相关联的一些长期存在的严重问题。在这里,我们提出了完整的计算提供精确的细节,特别是,正则化过程,这是决定性的正确推导的物理意义的量。一个基本的区别时,与其他作者以前获得的结果相比,在我们的方法中推导出的运动力包含一个反应项-成比例的镜子的加速度。这是为了在反射镜振荡期间始终获得具有正能量的粒子的本质-同时始终满足能量守恒定律。仔细分析以前在文献中获得的不同结果之间的相互关系,然后进行。为了简单起见,我们更详细地考虑了一维中性标量场的具体情况,其中有一个或两个部分透射镜(正则化问题的基本条件),但我们的一般方法被证明是可推广的,没有本质问题(本文第2节),在二维和更高维的任何类型的场。
英文摘要:
Recently [J. Haro and E. Elizalde, Phys. Rev. Lett. {\bf 97}, 130401 (2006)], a Hamiltonian formulation has been introduced in order to address some longstanding severe problems associated with the physical description of the dynamical Casimir effect at all times while the mirrors are moving. Here we present the complete calculation providing precise details, in particular, of the regularization procedure, which is decisive for the correct derivation of physically meaningful quantities. A basic difference when comparing with the results previously obtained by other authors is the fact that the motion force derived in our approach contains a reactive term --proportional to the mirrors' acceleration. This is of the essence in order to obtain particles with a positive energy all the time during the oscillation of the mirrors --while always satisfying the energy conservation law. A careful analysis of the interrelations among the different results previously obtained in the literature is then carried out. For simplicity, the specific case of a neutral scalar field in one dimension, with one or two partially transmitting mirrors (a fundamental proviso for the regularization issue) is considered in more detail, but our general method is shown to be generalizable, without essential problems (Sect. 2 of this paper), to fields of any kind in two and higher dimensions.
Topological Casimir effect in a quantum LC circuit: real-time dynamics
研究了定义在紧致小流形${\mathbb{M}}$上的Maxwell系统配分函数的新贡献,该流形具有非平凡映射$π_1[U(1)]\cong\mathbb{Z}$ .这些贡献不能用具有两个横向偏振的传统物理传播光子来描述,而是作为拓扑上不同但物理上相同的真空缠绕状态之间的隧穿跃迁的结果出现。\exclude{These new terms give an extra contribution to the Casimir pressure, yet to be measured.}我们认为,如果同一系统被认为是在一个小的外部时间依赖的E\&M场的背景下,那么真正的物理光子将从真空中发射出来,类似于动态卡西米尔效应(DCE)的光子辐射从真空中由于时间依赖的边界条件。这种分析的基本技术困难在于,物理光子在质量壳上的辐射本质上是一种实时Minkowski现象,而拓扑$|k\rangle$扇区之间的真空涨落则依赖于欧几里得瞬子公式。我们克服了这一障碍,通过引入辅助拓扑领域,允许一个简单的分析继续之间的闵可夫斯基和欧几里德描述,并开发一个量子力学技术来计算这些影响。我们还提出了一个实验实现这种小的影响,使用适当的边界条件的微波腔。最后,我们评论这种效应可能的宇宙学意义。