"Cosmological" quasiparticle production in harmonically trapped superfluid gases
"Cosmological" quasiparticle production in harmonically trapped superfluid gases
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DOI：
10.1103/physreva.69.033602
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发表时间：
2004-03-01
影响因子：
2.9
通讯作者：
Fischer, UR
中科院分区：
文献类型：
--
作者：
Fedichev, PO;Fischer, UR
我们表明，各种宇宙学动机的有效准粒子时空可以产生在谐波捕获超流玻色和费米气体。我们研究模拟的宇宙粒子生产在这些有效的时空，诱导的捕获潜力和耦合常数具有任意的时间依赖性。计算了超流真空中声子产生的WKB几率，并提出了一种通过测量密度-密度关联函数来探测准粒子产生的实验方法。
We show that a variety of cosmologically motivated effective quasiparticle space-times can be produced in harmonically trapped superfluid Bose and Fermi gases. We study the analog of cosmological particle production in these effective space-times, induced by trapping potentials and coupling constants possessing an arbitrary time dependence. The WKB probabilities for phonon creation from the superfluid vacuum are calculated, and an experimental procedure to detect quasiparticle production by measuring density-density correlation functions is proposed.