Crystallization, Fermionization, and Cavity-Induced Phase Transitions of Bose-Einstein Condensates

A. U. J. Lode (), O. E. Alon (), L. S. Cederbaum (), B. Chakrabarti, B. Chatterjee, R. Chitra, A. Gammal, S. K. Haldar, M. L. Lekala, C. Lévêque, R. Lin, P. Molignini, L. Papariello and M. C. Tsatsos
Additional contact information
A. U. J. Lode: Institute of Physics
O. E. Alon: University of Haifa, Department of Mathematics
L. S. Cederbaum: Universität Heidelberg, Theoretische Chemie, Physikalisch-Chemisches Institut
B. Chakrabarti: Presidency University, Department of Physics
B. Chatterjee: Indian Institute of Technology-Kanpur, Department of Physics
R. Chitra: Institute for Theoretical Physics
A. Gammal: Universidade de São Paulo, Instituto de Fisica
S. K. Haldar: University of Haifa, Department of Mathematics
M. L. Lekala: University of South Africa, Department of Physics
C. Lévêque: Atominstitut, TU Wien, Vienna Center for Quantum Science and Technology
R. Lin: Institute for Theoretical Physics
P. Molignini: Institute for Theoretical Physics
L. Papariello: Institute for Theoretical Physics
M. C. Tsatsos: University of São Paulo, São Carlos Institute of Physics

A chapter in High Performance Computing in Science and Engineering '19, 2021, pp 77-87 from Springer

Abstract: Abstract Bose-Einstein condensates (BECs) are one of the cornerstones in the exploration of the quantum many-body physics of interacting indistinguishable particles. Here, we study them using the MultiConfigurational Time-Dependent Hartree for Bosons (MCTDHB) method implemented in the MCTDHB and MCTDH-X software packages using the Cray XC40 system Hazel Hen. In this year we investigated the physics of (i) fermionization and crystallization of ultracold strongly interacting bosons, (ii) correlations of bosons with strong dipolar interactions, (iii) cavity-induced phase transitions of ultracold bosons in high-finesse cavities, (iv) the dimensionality of the variance of BECs in annular confinements, (v) the dynamics of BECs with long-ranged interactions in a bosonic Josephson junction, (vi) the dynamics of BECs in an asymmetric bosonic Josephson junction, (vii) the variance of BECs in anharmonic traps. All these results are novel and intriguing findings that demonstrate the versatility of the MCTDHB method, its implementations in the MCTDHB and MCTDH-X software packages, and how extremely fruitful the computational resources at the HLRS system Hazel Hen were for the MCTDHB project there. For the sake of brevity, we restrict the present report to the results (i)–(iii). We conclude with an outline for possible future avenues in the development revolving around MCTDHB and MCTDH-X.

Date: 2021
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DOI: 10.1007/978-3-030-66792-4_5

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