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Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics
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Shortcuts to adiabaticity in a time-dependent box
1Los Alamos National Laboratory, Theoretical Division T-4 and T-CNLS, Los Alamos, NM 87545, USA. delcampo@lanl.gov
Scientific Reports
|September 13, 2012
Summary
This study introduces a novel method for controlling ultrafast dynamics in ultracold gases, preserving quantum correlations by inverting a scaling law. The technique is robust and applicable to various interacting many-body systems.
Area of Science:
- Quantum physics
- Ultracold atomic gases
- Many-body systems
Background:
- Controlling quantum dynamics is crucial for quantum technologies.
- Maintaining quantum correlations during rapid evolutions is challenging.
- Adiabatic approximations often fail for ultrafast processes.
Purpose of the Study:
- To develop a method for driving ultrafast non-adiabatic dynamics in ultracold gases.
- To preserve quantum correlations and avoid spurious excitations.
- To extend the method to interacting many-body systems.
Main Methods:
- Utilizing an adiabatic invariant and inverting its self-similar scaling law.
- Employing a time-dependent box potential.
- Incorporating an auxiliary expulsive potential for physical implementation.
Main Results:
- Achieved ultrafast non-adiabatic dynamics free from spurious excitations.
- Preserved initial quantum correlations up to a scaling factor.
- Demonstrated robustness for Tonks-Girardeau gases and Bose-Einstein condensates.
Conclusions:
- The proposed method offers precise control over ultrafast quantum dynamics.
- It is applicable to a wide range of interacting many-body systems.
- The technique shows excellent robustness with experimentally realizable potentials.
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