1. Continuous Matrix Product Operator Approach to Finite Temperature Quantum States.
- Author
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Wei Tang, Hong-Hao Tu, and Lei Wang
- Subjects
- *
MATRIX multiplications , *NUCLEAR magnetic resonance , *SPIN-lattice relaxation , *ISING model , *ALGORITHMS , *SPECIFIC heat , *FERRIMAGNETIC materials - Abstract
We present an algorithm for studying quantum systems at finite temperature using continuous matrix product operator representation. The approach handles both short-range and long-range interactions in the thermodynamic limit without incurring any time discretization error. Moreover, the approach provides direct access to physical observables including the specific heat, local susceptibility, and local spectral functions. After verifying the method using the prototypical quantum XXZ chains, we apply it to quantum Ising models with power-law decaying interactions and on the infinite cylinder, respectively. The approach offers predictions that are relevant to experiments in quantum simulators and the nuclear magnetic resonance spin-lattice relaxation rate. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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