SciPost Physics Lecture Notes: Many-body quantum dynamics with MCTDH-X

The newest lecture notes on MCTDH-X just dropped! Written by P. Molignini, S. Dutta and E. Fasshauer, they are now published in SciPost Physics Lecture Notes: https://scipost.org/10.21468/SciPostPhysLectNotes.94

J. Phys.: Conf. Ser.: Condensates breaking up under rotation

"Condensates breaking up under rotation" -- a work by S. Dutta, A. U. J. Lode, and O. E. Alon, was published in J. Phys.: Conf. Ser. 2894, 012014 (2024): https://doi.org/10.1088/1742-6596/2894/1/012014. 

PRR: Interaction quench of dipolar bosons in a one-dimensional optical lattice

"Interaction quench of dipolar bosons in a one-dimensional optical lattice", a paper by P. Molignini and B. Chakrabarti, was just published in Physical Review Research: https://doi.org/10.1103/PhysRevResearch.7.013257.


This paper explores the stability of super-Tonks–Girardeau-like states in dipolar bosonic systems after an interaction quench, showing that long-range dipolar forces can destabilize excited states depending on filling and interaction strength, with collapse dynamics revealed through many-body observables beyond density profiles.

NJP: Interference of longitudinal and transversal fragmentations in the Josephson tunneling dynamics of Bose–Einstein condensates

A new research article using MCTDH-X was published in New Journal of Physics by collaborators Anal Bhowmik and Ofir Alon.

The paper is titled "Interference of longitudinal and transversal fragmentations in the Josephson tunneling dynamics of Bose–Einstein condensates". This study explores how initial transverse fragmentation affects the tunneling dynamics of bosons in a Josephson junction, revealing that interference between longitudinal and transverse fragmentations leads to accelerated revival processes and distinct many-body effects absent in mean-field dynamics. 

Atoms: Many-Body Effects in a Composite Bosonic Josephson Junction

"Many-Body Effects in a Composite Bosonic Josephson Junction" -- a work by Sudip Kumar Haldar and Anal Bhowmik using MCTDHB was published in the journal Atoms: https://doi.org/10.3390/atoms12120066

 

 

PRR: Realizing multiband states with ultracold dipolar quantum simulators

MCTDH-X was instrumental for a recent publication that benchmarked dipolar quantum simulators in two dimensions. The work is titled "Realizing multiband states with ultracold dipolar quantum simulators" and was authored by two MCTDH-X developers (Yuliya & Paolo) and an external collaborator (Michael Hughes).

Here is the link if you want to know more: https://journals.aps.org/prresearch/abstract/10.1103/PhysRevResearch.6.L042024

 

NJP: Unbounded entropy production and violent fragmentation for repulsive-to-attractive interaction quench in long-range interacting systems

Two of us (Paolo and Barnali) published a paper on New Journal of Physics titled "Unbounded entropy production and violent fragmentation for repulsive-to-attractive interaction quench in long-range interacting systems". Check it out: https://iopscience.iop.org/article/10.1088/1367-2630/ad80b8. The paper also includes a short video abstract with a thorough explanation of the main findings!

Eur. Phys. J. Plus: Expansion of strongly interacting dipolar bosons in 1D optical lattices

"Expansion of strongly interacting dipolar bosons in 1D optical lattices", a work by R. Roy, A. Trombettoni, and B. Chakrabarti, was published in the European Physical Journal Plus: https://link.springer.com/article/10.1140/epjp/s13360-024-05651-9 

This paper uses MCTDH-X to investigate how dipolar interactions affect the expansion of bosons in a 1D optical lattice, revealing interaction- and lattice-dependent transport regimes, including bimodal expansion and arrested dynamics, which differ markedly from systems with only contact interactions. 

 

Annals of Physics: Quasi-superfluid and quasi-mott phases of strongly interacting bosons in shallow optical lattice

"Quasi-superfluid and quasi-mott phases of strongly interacting bosons in shallow optical lattice", a work by S. Roy, R. Roy, A. Gammal, B. Chakrabarti, and B. Chatterjee, was published in Annals of Physics: https://doi.org/10.1016/j.aop.2024.169807.

This paper uses the MCTDHB method to uncover two new many-body phases of strongly interacting bosons in weak lattices—quasi-superfluid and quasi-Mott insulator—characterized by fragmentation and analyzed via coherence and entropy measures as the lattice depth increases.

J. Phys.: Cond. Mat.: combining MCTDH-X with path-integral quantum Monte Carlo

A new paper that combines #MCTDHX and path-integral quantum Monte Carlo was published in Journal of Physics: Condensed Matter by A. Sakhel and collaborators from Jordan! Effect of zero-point motion on properties of quantum particles adsorbed on a substrate: https://iopscience.iop.org/article/10.1088/1361-648X/ad3095 .

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