Strongly interacting polaritons in coupled arrays of cavities
Strongly interacting polaritons in coupled arrays of cavities
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DOI：
10.1038/nphys462
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发表时间：
2006-12-01
期刊：
影响因子：
19.6
通讯作者：
Plenio, Martin B.
中科院分区：
文献类型：
--
作者：
Hartmann, Michael J.;Brandao, Fernando G. S. L.;Plenio, Martin B.
由于所涉及的长度和时间尺度都很短，因此在强相关的多粒子系统中观察量子现象很困难。对此类系统中各个元素的状态进行控制更是如此，并且是实现量子计算设备的一个障碍。光学晶格中的约瑟夫森结和冷原子阵列已经取得了实质性进展，其中对集体属性的详细控制是可行的，但解决单个位点仍然是一个挑战。在这里，我们展示了保存在谐振光学腔阵列中的极化子系统，可以使用光子晶体或环形微谐振器来实现，可以形成一个强相互作用的多体系统，显示量子相变，其中可以控制和测量单个粒子。该系统还提供了产生有吸引力的现场电势的可能性，产生高度纠缠态和粒子比超流体更加离域的相。
Observing quantum phenomena in strongly correlated many-particle systems is difficult because of the short length- and timescales involved. Exerting control over the state of individual elements within such a system is even more so, and represents a hurdle in the realization of quantum computing devices. Substantial progress has been achieved with arrays of Josephson junctions and cold atoms in optical lattices, where detailed control over collective properties is feasible, but addressing individual sites remains a challenge. Here we show that a system of polaritons held in an array of resonant optical cavities which could be realized using photonic crystals or toroidal microresonators - can form a strongly interacting many-body system showing quantum phase transitions, where individual particles can be controlled and measured. The system also offers the possibility to generate attractive onsite potentials yielding highly entangled states and a phase with particles much more delocalized than in superfluids.