论文标题
Fermi表面共振和强烈相互作用的费米气体
Fermi Surface Resonance and Quantum Criticality in Strongly Interacting Fermi Gases
论文作者
论文摘要
费米气体中的费米斯遵守保利的排除原则，限制了任何两个费米子填充相同的量子状态。费米之间的强相互作用可以完全改变费米气体的性质。在我们的理论研究中，我们发现在强烈相互作用的费米气体中发现了一个新的外来量子相，这些量子被限制在施加在费米表面上的某种条件下，我们称之为费米表面的共振。新阶段至关重要，可以通过光谱密度和不同静态敏感性的幂律频率识别。新阶段的一个特别引人注目的特征是与奇怪金属相似的DC电阻率的异常幂律温度依赖性。新的量子临界阶段可以在普通的半导体异质结构中实验发现。
Fermions in the Fermi gas obey the Pauli exclusion principle restricting any two fermions from filling the same quantum state. Strong interaction between fermions can completely change the properties of the Fermi gas. In our theoretical study we find a new exotic quantum phase in strongly interacting Fermi gases constrained to a certain condition imposed on the Fermi surfaces which we call the Fermi surface resonance. The new phase is quantum critical which can be identified by the power-law frequency tail of the spectral density and divergent static susceptibilities. An especially striking feature of the new phase is the anomalous power-law temperature dependence of the dc resistivity that is similar to strange metals. The new quantum critical phase can be experimentally found in ordinary semiconductor heterostructures.
