Quantum Critical Phenomena
Quantum Critical Phenomena
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DOI：
10.1007/978-981-15-2580-3_3
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发表时间：
2020-01
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影响因子：
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通讯作者：
Yuto Ashida
中科院分区：
文献类型：
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作者：
Yuto Ashida
量子临界现象起源于强关联粒子的集体行为，是多体系统中普遍低能性质的核心。量子粒子之间的强关联在低维系统中尤为突出。在本章的第一部分，我们将确定哪些类型的测量与一维低能性质相关，并讨论它们如何定性地改变潜在的量子临界行为。在第二部分中，我们研究了测量反作用如何影响在更高的维度量子相变的玻色-哈伯德模型为重点。对于所有的理论考虑，我们讨论可能的实验实现在超冷原子气体。
Quantum critical phenomena originate from collective behavior of strongly correlated particles and lie at the heart of universal low-energy properties in many-body systems. The strong correlation between quantum particles is particularly prominent in a low-dimensional system. In the first part of this Chapter, we identify what types of measurements are relevant to one-dimensional low-energy properties and address how they qualitatively alter the underlying quantum critical behavior. In the second part, we study how the measurement backaction influences on quantum phase transitions in higher dimensions by focusing on the Bose-Hubbard model. For all the theoretical considerations, we discuss possible experimental implementations in ultracold atomic gases.