Generalized Unruh effect and Lamb shift for atoms on arbitrary stationary trajectories
Generalized Unruh effect and Lamb shift for atoms on arbitrary stationary trajectories
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DOI：
10.1088/0264-9381/12/12/010
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发表时间：
1995-12-01
影响因子：
3.5
通讯作者：
Holzmann, M
中科院分区：
文献类型：
--
作者：
Audretsch, J;Muller, R;Holzmann, M
我们研究了加速原子在任意静止轨道上的自发退激和激发(广义Unruh效应)。我们分别考虑了真空涨落和辐射反应的影响。结果表明，辐射反应一般不受静止加速的影响，而真空涨落对所有静止加速轨迹的贡献不同于其惯性值。基态的自发激发发生在所有加速的静止轨道上，因此是“正常情况”。此外，我们还证明了对于所有静止的轨道，二能级原子的辐射能量漂移(‘Lamb漂移’)被加速度所修正。同样，只有真空波动才会引起这种转变。我们的结果以原子作圆周运动的特殊情况为例进行了说明，这可能是实验上相关的。
We study the spontaneous de-excitation and excitation of accelerated atoms on arbitrary stationary trajectories ('generalized Unruh effect'). We consider the effects of vacuum fluctuations and radiation reaction separately. We show that radiation reaction is generally not altered by stationary acceleration, whereas the contribution of vacuum fluctuations differs for all stationary accelerated trajectories from its inertial value. Spontaneous excitation from the ground state occurs for all accelerated stationary trajectories and is therefore the 'normal case'. Furthermore, we show that the radiative energy shift ('Lamb shift') of a two-level atom is modified by acceleration for all stationary trajectories. Again only vacuum fluctuations give rise to the shift. Our results are illustrated for the special case of an atom in circular motion, which may be relevant experimentally.