We provide general conditions for which bosonic quadratic Hamiltonians on Fock spaces can be diagonalized by Bogoliubov transformations. Our results cover the case when quantum systems have infinite degrees of freedom and the associated one-body kinetic and paring operators are unbounded. Our sufficient conditions are optimal in the sense that they become necessary when the relevant one-body operators commute.
Bogoliubov theory for the dilute Fermi gas in three dimensions
在一个自旋为1/2的N个费米子的三维稀体系中,研究了由基态能量与非相互作用费米子海态能量之差给出的关联能.我们回顾了Falconi等人的论文[Ann. Henri Poincaré 22(2021),2283-2353]中的一些最新结果,其中我们利用了Bogoliubov理论可以有效描述的系统低能激发的几乎玻色子性质。
Analytical diagonalization of the open-boundary bosonic Kitaev chain: An asymmetric plane-wave ansatz approach
Center for Quantum Technology Research, and Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurements (MOE), School of Physics, Beijing Institute of Technology(北京理工大学物理学院量子技术研究中心及先进光电子量子架构与测量教育部重点实验室);Center for the Cross-disciplinary Research of Space Science and Quantum-technologies (CROSS-Q), College of Physics, Nanjing University of Aeronautics and Astronautics(南京航空航天大学物理学院空间科学与量子技术交叉研究中心)