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Flow equations for cold Bose gases

Volosniev, A G ; Hammer, H-W (2017)
Flow equations for cold Bose gases.
In: New Journal of Physics, 2017, 19 (11)
Article, Secondary publication

Copyright Information: CC BY 4.0 International - Creative Commons, Attribution.

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Item Type: Article
Type of entry: Secondary publication
Title: Flow equations for cold Bose gases
Language: English
Date: 14 December 2017
Place of Publication: Darmstadt
Year of primary publication: 2017
Journal or Publication Title: New Journal of Physics
Volume of the journal: 19
Issue Number: 11
Corresponding Links:
Origin: Secondary publication via sponsored Golden Open Access

Wederive flow equations for cold atomic gases with one macroscopically populated energy level. The generator is chosen such that the ground state decouples from all other states in the system as the renormalization group flow progresses.Wepropose a self-consistent truncation scheme for the flow equations at the level of three-body operators and show how they can be used to calculate the ground state energy of a generalN-body system. Moreover, we provide a general method to estimate the truncation error in the calculated energies. Finally, we test our scheme by benchmarking to the exactly solvable Lieb–Liniger model and find good agreement for weak and moderate interaction strengths.

Identification Number: 113051
URN: urn:nbn:de:tuda-tuprints-70408
Classification DDC: 500 Science and mathematics > 530 Physics
Divisions: 05 Department of Physics > Institute of Nuclear Physics > Theoretische Kernphysik
Date Deposited: 14 Dec 2017 13:28
Last Modified: 14 Nov 2023 19:03
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/7040
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