Quantum critical behavior in strongly interacting Rydberg gases.
Quantum critical behavior in strongly interacting Rydberg gases.
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DOI：
10.1103/physrevlett.101.250601
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发表时间：
2008-06
影响因子：
8.6
通讯作者：
H. Weimer;R. Löw;T. Pfau;H. Büchler
中科院分区：
文献类型：
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作者：
H. Weimer;R. Löw;T. Pfau;H. Büchler
我们研究了共振驱动原子系综进入强相互作用里德堡态时的关联多体现象。描述驱动系统的哈密顿量的基态表现出二阶量子相变。我们推导了量子相变的临界理论，并表明它描述了饱和状态下驱动里德伯系统的性质。我们发现，被称为封锁现象的抑制里德堡激发表现出一个普遍的指数代数标度律。
We study the appearance of correlated many-body phenomena in an ensemble of atoms driven resonantly into a strongly interacting Rydberg state. The ground state of the Hamiltonian describing the driven system exhibits a second order quantum phase transition. We derive the critical theory for the quantum phase transition and show that it describes the properties of the driven Rydberg system in the saturated regime. We find that the suppression of Rydberg excitations known as blockade phenomena exhibits an algebraic scaling law with a universal exponent.