Curved spacetime from interacting gauge theories

Curved spacetime from interacting gauge theories
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相互作用规范理论中的弯曲时空

DOI:
10.1088/1361-6382/aaf9f6
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发表时间:
2019
影响因子:
3.5
通讯作者:
Butera S
Butera S
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Butera S

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玻色-爱因斯坦凝聚体中的声子可以通过控制凝聚体的流动速度来表现得好像它们在弯曲的时空中传播一样。看似与此无关,人工规范势可以通过例如将两个原子能级耦合到激光场来在电荷中性的原子凝聚体中诱导。在这项工作中,我们连接这两个世界,并表明,合成的相互作用规范场,即密度相关的规范位,诱导一个非平凡的声子时空结构。虽然声子的有效视界的产生完全取决于凝聚体的流速,但这允许通过调谐横向激光相位来容易地设计新的时空几何形状。通过利用这个新的自由度,我们表明,在2+ 1维的有效带电声子可以模拟,表现得好像他们移动的引力场和电磁场的影响下。
Phonons in a Bose–Einstein condensate can be made to behave as if they propagate in curved spacetime by controlling the condensate flow speed. Seemingly disconnected to this, artificial gauge potentials can be induced in charge neutral atomic condensates by for instance coupling two atomic levels to a laser field. In this work, we connect these two worlds and show that synthetic interacting gauge fields, ie density-dependent gauge potentials, induce a non-trivial spacetime structure for the phonons. Whilst the creation of effective horizons for phonons solely depends on the flow speed of the condensate, this allows for the creation of new spacetime geometries which can be easily designed by tuning the transverse laser phase. By exploiting this new degree of freedom we show that effectively charged phonons in 2+ 1 dimensions can be simulated, which behave as if they move under the influence of both a gravitational and an electromagnetic field.
DOI: 10.1103/physreva.69.033602
发表时间: 2004-03-01
期刊: PHYSICAL REVIEW A
影响因子: 2.9
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影响因子: 3.5
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DOI: 10.1088/0264-9381/23/9/023
发表时间: 2005
影响因子: 3.5
作者:
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通讯作者: S. Weinfurtner