Journal
PHYSICAL REVIEW B
Volume 96, Issue 9, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.96.094303
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Funding
- EU via RYSQ
- EU via UQUAM
- EU via QUIC
- DFG [SFB/TRR21]
- Baden-Wurttemberg Stiftung via Eliteprogramm
- Carl Zeiss Foundation
- National Research Foundation of Singapore (CRP-QSYNC)
- Oxford Martin School
- DFG
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We present a technique to compute the microcanonical thermodynamical properties of a many-body quantum system using tensor networks. The density of States, and more general spectral properties, are evaluated by means of a Hubbard-Stratonovich transformation performed on top of a real-time evolution, which is carried out via numerical methods based on tensor networks. As a consequence, the free energy and thermal averages can be also calculated. We test this approach on the one-dimensional Ising and Fermi-Hubbard models. Using matrix product states, we show that the thermodynamical quantities as a function of temperature are in very good agreement with the exact results.
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