| Title: | Multifractality in quasienergy space of coherent states as a signature of quantum chaos |
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| Authors: | ID Wang, Qian (Author)
ID Robnik, Marko (Author) |
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| Files: |  Multifractality_in_quasienergy_space_Wang_2021.pdf (3,13 MB)
MD5: D78A09D3CB059ED70F039220F001B5DE
 https://www.mdpi.com/1099-4300/23/10/1347
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| Language: | English |
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| Work type: | Scientific work |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | UM - University of Maribor
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| Abstract: | We present the multifractal analysis of coherent states in kicked top model by expanding them in the basis of Floquet operator eigenstates. We demonstrate the manifestation of phase space structures in the multifractal properties of coherent states. In the classical limit, the classical dynamical map can be constructed, allowing us to explore the corresponding phase space portraits and to calculate the Lyapunov exponent. By tuning the kicking strength, the system undergoes a transition from regularity to chaos. We show that the variation of multifractal dimensions of coherent states with kicking strength is able to capture the structural changes of the phase space. The onset of chaos is clearly identified by the phase-space-averaged multifractal dimensions, which are well described by random matrix theory in a strongly chaotic regime. We further investigate the probability distribution of expansion coefficients, and show that the deviation between the numerical results and the prediction of random matrix theory behaves as a reliable detector of quantum chaos. |
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| Keywords: | quantum chaos, multifractal analysis, kicked top, coherent states |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Submitted for review: | 11.09.2021 |
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| Article acceptance date: | 12.10.2021 |
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| Publication date: | 15.10.2021 |
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| Publisher: | MDPI |
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| Year of publishing: | 2021 |
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| Number of pages: | Str. 1-19 |
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| Numbering: | Letn. 23, Št. 10, št. članka 1347 |
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| PID: | 20.500.12556/DKUM-86153  |
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| UDC: | 530.145 |
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| ISSN on article: | 1099-4300 |
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| COBISS.SI-ID: | 81221379 |
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| Publication date in DKUM: | 13.10.2023 |
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| Views: | 433 |
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| Downloads: | 25 |
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| Metadata: |    |
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| Categories: | Misc.
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