少光子区的场致相变
Field induced phase transition in the few photon regime
摘要：
在工作[1]中，在隧穿机制（$ω\ll m$，其中$ω$是外场的特征频率，$m$是电子质量）的范围内讨论了在强随时间变化的电场中伴随电子-正电子等离子体（EPP）真空产生的场诱导相变的一些特征。在本贡献的特点，这一过程将被认为是在少数光子域中，$ω\sim m$。我们观察到一个狭窄的瞬态域的快速振荡，主要是一个相当大的增长的EPP生产的有效性。在这些情况下，我们看到在双频激发的特定情况下EPP创建的有效性增加，其中两种机制（隧穿和少数光子）同时起作用[2，3]。
英文摘要：
Some features of the field induced phase transition accompanied by the vacuum creation of an electron-positron plasma (EPP) in strong time-dependent electric fields have been discussed in the work [1] in the domain of the tunneling mechanism ($ω\ll m$, where $ω$ is the characteristic frequency of the external field and $m$ is the electron mass). In the present contribution the features of the this process will be considered in the few photon domain where $ω\sim m$. We observe a narrowing of the transient domain of the fast oscillations and, mainly, a considerable growth of the effectiveness of the EPP production. Under these circumstances, we see an increase of the effectiveness of the EPP creation in the particular case of a bifrequent excitation, where both mechanisms (tunneling and few photon) act simultaneously [2,3].
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