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Confinement-Induced Resonances in Spherical Shell Traps
C Moritz Carmesin1, Maxim A Efremov1,2
1Universität Ulm, Institut für Quantenphysik and Center for Integrated Quantum Science and Technology (IQST), 89081 Ulm, Germany.
Physical Review Letters
|July 31, 2025
Summary
Researchers computed the energy spectrum of two interacting bosonic particles in a shell trap. They identified confinement-induced resonances, offering a new way to control atom-atom interactions by tuning the shell
Area of Science:
- Atomic, molecular and optical physics.
- Quantum mechanics.
- Condensed matter physics.
Background:
- Two-body problem in quantum mechanics.
- Interacting bosonic particles.
- Confined quantum systems.
Purpose of the Study:
- Compute the energy spectrum and wave functions of two interacting bosonic particles in a spherical shell trap.
- Identify confinement-induced resonances.
- Explore controlling atom-atom interactions via geometrical parameters.
Main Methods:
- Numerical computation of energy spectrum and wave functions.
- Analysis of avoided crossings in the energy spectrum.
- Investigation of the relative and center-of-mass motions.
Main Results:
- Calculated energy spectrum and wave functions for the system.
- Identified confinement-induced resonances as avoided crossings.
- Demonstrated that resonances arise from strong coupling between relative and center-of-mass motions.
Conclusions:
- Confinement-induced resonances provide a mechanism to control atom-atom interactions.
- Tuning geometrical parameters of the shell trap allows control over interactions.
- This offers a novel approach for manipulating atomic gases.
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