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Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
Published on: March 30, 2017
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Spectral Structure and Many-Body Dynamics of Ultracold Bosons in a Double-Well
Frank Schäfer1,2, Miguel A Bastarrachea-Magnani1,3, Axel U J Lode1
1Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Hermann-Herder-Straße 3, D-79104 Freiburg, Germany.
Entropy (Basel, Switzerland)
|December 8, 2020
Summary
We studied interacting bosons in a double-well potential, exploring their dynamics and spectral structure. Our findings reveal how barrier height and interactions influence quantum behavior, offering insights into many-body systems.
Area of Science:
- Quantum mechanics
- Atomic physics
- Condensed matter physics
Background:
- Understanding the behavior of interacting quantum particles in confined potentials is crucial for quantum technologies.
- Double-well potentials are fundamental systems for studying quantum phenomena like tunneling and entanglement.
Purpose of the Study:
- To investigate the spectral structure and many-body dynamics of two and three interacting bosons in a 1D double-well.
- To analyze the influence of barrier height, interaction strength, and initial conditions on system evolution.
- To characterize the transition from diabatic to quasi-adiabatic dynamics using quantum entropy measures.
Main Methods:
- Exact diagonalization of the many-particle Hamiltonian for small particle numbers.
- Multiconfigurational time-dependent Hartree method for indistinguishable particles (MCTDH-X) for larger systems.
- Analysis of particle dynamics launched from ground and saddle-point states.
Main Results:
- Detailed examination of spectral properties and dynamical evolution under varying parameters.
- Characterization of the crossover from diabatic to quasi-adiabatic regimes.
- Demonstration of MCTDH-X for extrapolating results to higher particle counts.
Conclusions:
- The study provides a comprehensive analysis of interacting boson dynamics in a double-well.
- Insights into quantum state evolution and the impact of potential manipulation.
- Validation of advanced computational methods for simulating complex quantum systems.
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