Control of quantum localization and classical diffusion in laser-kicked molecular rotors

Abstract

We experimentally study a system of quantum kicked rotors - an ensemble of diatomic molecules exposed to a periodic sequence of ultrashort laser pulses. In the regime, where the underlying classical dynamics is chaotic, we investigate the quantum phenomenon of dynamical localization by means of state-resolved coherent Raman spectroscopy. We examine the dependence of the exponentially localized angular momentum distribution and of the total rotational energy on the time period between the pulses and their amplitude. The former parameter is shown to provide control over the localization center, whereas the latter one controls the localization length. Similar control of the center and width of a nonlocalized rotational distribution is demonstrated in the limit of classical diffusion, established by adding noise to the periodic pulse sequence.

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References in corpus (10)

• Experimental observation of the Anderson transition with atomic matter waves
• Observing Molecular Spinning via the Rotational Doppler Effect
• Quantum resonances in selective rotational excitation of molecules with a sequence of ultrashort laser pulses
• Experimental observation of Anderson localization in laser-kicked molecular rotors
• Ballistic and localized transport for the atom optics kicked rotor in the limit of vanishing kicking period
• Observation of Bloch oscillations in molecular rotation
• Quantum resonance, Anderson localisation and selective manipulations in molecular mixtures by ultrashort laser pulses
• Anderson wall and Bloch oscillations in molecular rotation
• Generating long sequences of high-intensity femtosecond pulses
• Edge states of periodically kicked quantum rotors

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• Statistical periodicity in driven quantum systems: General formalism and application to noisy Floquet topological chains
• Simulating Floquet topological phases in static systems
• Quantum dynamics of a planar rotor driven by suddenly switched combined aligning and orienting interactions
• Topological charges of periodically kicked molecules
• Topological reflection matrix
• Anomalous multi-gap topological phases in periodically driven quantum rotors
• Noise resilience of two-dimensional Floquet topological phases