非相对论性共形场论与囚禁原子：维里定理与三维态算符对应
On Non-Relativistic Conformal Field Theory and Trapped Atoms: Virial Theorems and the State-Operator Correspondence in Three Dimensions
摘要：
非相对论费米子接触相互作用的场论可以用来计算简谐势阱中冷原子的少体系统的性质。非相对论性共形场论（NRCFT）的态-算符对应表明，N个简谐囚禁费米子的能量本征值（振子单位）可以由NRCFT中N个费米子算符的标度维数来计算.它们也与自由空间中N体问题的零能量、标度不变解一一对应。我们表明，这两个映射的被困费米子问题的自由空间问题是相关的SL（2，R）代数的共形对称的费米子在酉极限的自同构。这种自同构交换了气体的内部哈密顿量与俘获势，从而提供了一种新的方法来推导维里定理的捕获费米气体在幺正极限。我们还表明，通过计算两个和三个费米子运营商的标度尺寸，并找到与已知的确切结果一致的能级的两个和三个被困费米子在酉极限的状态算子对应可以直接应用在三维空间。
英文摘要：
The field theory of nonrelativistic fermions interacting via contact interactions can be used to calculate the properties of few-body systems of cold atoms confined in harmonic traps. The state-operator correspondence of Non-Relativistic Conformal Field Theory (NRCFT) shows that the energy eigenvalues (in oscillator units) of N harmonically trapped fermions can be calculated from the scaling dimensions of N-fermion operators in the NRCFT. They are also in one-to-one correspondence with zero-energy, scale-invariant solutions to the N-body problem in free space. We show that these two mappings of the trapped fermion problem to free space problems are related by an automorphism of the SL(2,R) algebra of the conformal symmetry of fermions at the unitary limit. This automorphism exchanges the internal Hamiltonian of the gas with the trapping potential and hence provides a novel method for deriving virial theorems for trapped Fermi gases at the unitary limit. We also show that the state-operator correspondence can be applied directly in three spatial dimensions by calculating the scaling dimensions of two- and three-fermion operators and finding agreement with known exact results for energy levels of two and three trapped fermions at the unitary limit.
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