Analogue of cosmological particle creation in an ion trap.
Analogue of cosmological particle creation in an ion trap.
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DOI：
10.1103/physrevlett.99.201301
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发表时间：
2007-05
影响因子：
8.6
通讯作者：
R. Schützhold;M. Uhlmann;L. Petersen;H. Schmitz;A. Friedenauer;T. Schätz
中科院分区：
文献类型：
--
作者：
R. Schützhold;M. Uhlmann;L. Petersen;H. Schmitz;A. Friedenauer;T. Schätz
我们研究了由含时(轴向)势强的陷阱限制的离子动力学链中的声子，并证明了它们的行为方式与膨胀或收缩宇宙中的量子场相同。在此类比的基础上，我们提出了一种探测宇宙粒子产生的类比的方案，该方案在目前的技术条件下应该是可行的。为了测试粒子产生机制的量子性质，并将其与加热等经典效应区分开来，我们建议通过第二个红边带跃迁测量双声子幅度，并将其与单声子幅度(第一个红边带)进行比较。
We study phonons in a dynamical chain of ions confined by a trap with a time-dependent (axial) potential strength and demonstrate that they behave in the same way as quantum fields in an expanding or contracting Universe. Based on this analogy, we present a scheme for the detection of the analogue of cosmological particle creation which should be feasible with present day technology. In order to test the quantum nature of the particle creation mechanism and to distinguish it from classical effects such as heating, we propose to measure the two-phonon amplitude via the 2nd red sideband transition and to compare it with the one-phonon amplitude (1st red sideband).