46 citations · 235 across the 27 of their papers we have counts for
13 papers · 1 filter
Pinning of a High-Energy Wavepacket by a Single Impurity
Fartash Chalangari, Anant Vijay Varma, Joonas Keski-Rahkonen +1
We demonstrate that a single repulsive impurity enhances directional confinement of a high-energy wavepacket in a finite two-dimensional lattice of quantum wells. At energies far a…
Universal Quantum Birthmark: Ghost of the quantum past
Ivy Xiaoya, Anton M. Graf, Eric J. Heller +1
Quantum dynamics retains a permanent and universal memory of its initial conditions, even in systems whose spectra display fully chaotic, random-matrix behavior. This effect, known…
Adiabaticity Crossover: From Anderson Localization to Planckian Diffusion
Tiange Xiang, Yubo Zhang, Joonas Keski-Rahkonen +2
We investigate electron transport in one dimension from the quantum-acoustic perspective, where the coherent-state representation of lattice vibrations results in a time-dependent…
Coexistence of Anderson Localization and Quantum Scarring in Two Dimensions
Fartash Chalangari, Anant Vijay Varma, Joonas Keski-Rahkonen +1
We investigate finite two-dimensional disordered systems with periodic confinement. At low energies, eigenstates exhibit strong Anderson localization, while at higher energies a su…
Path-Integral Approach to Quantum Acoustics
Joost V. de Nijs, Anton M. Graf, Eric J. Heller +1
A path-integral approach to quantum acoustics is developed here. In contrast to the commonly utilized particle perspective, this emerging field brings forth a long neglected but es…
Antiscarring from eigenstate stacking in a chaotic spinor condensate
Zhongling Lu, Anton M. Graf, Eric J. Heller +2
We reveal a feature of quantum scarring in systems with many particles: Quantum scars, living densely near an unstable periodic orbit, must be compensated by corresponding antiscar…
Quantum birthmarks: Ergodicity breaking beyond scarring
Anton M. Graf, Saul Atwood, Mingxuan Xiao +3
A hallmark of classical ergodicity is the complete loss of memory of the initial conditions due to eventual uniform covering of {\it a priori} available phase space. In quantum cou…
Planckian Diffusion: The Ghost of Anderson Localization
Yubo Zhang, Anton M. Graf, Alhun Aydin +2
We find that Anderson localization ceases to exist when a random medium begins to move, but another type of fundamental quantum effect, Planckian diffusion , rises to…
Antiscarring in Chaotic Quantum Wells
J. Keski-Rahkonen, A. M. Graf, E. J. Heller
Chaos plays a crucial role in numerous natural phenomena, but its quantum nature has remained large elusive. One intriguing quantum-chaotic phenomenon is the scarring of a single-p…
Quantum-Acoustical Drude Peak Shift
J. Keski-Rahkonen, X. -Y. Ouyang, S. Yuan +3
Quantum acoustics -- a recently developed framework parallel to quantum optics -- establishesa nonperturbative and coherent treatment of the electron-phonon interaction in real spa…
Quantum Lissajous Scars
J. Keski-Rahkonen, A. Ruhanen, E. J. Heller +1
A quantum scar - an enhancement of a quantum probability density in the vicinity of a classical periodic orbit - is a fundamental phenomenon connecting quantum and classical mechan…
Effects of scarring on quantum chaos in disordered quantum wells
J. Keski-Rahkonen, P. J. J. Luukko, S. Åberg +1
The suppression of chaos in quantum reality is evident in quantum scars, i.e., in enhanced probability densities along classical periodic orbits, providing opportunities in control…
Controllable quantum scars in semiconductor quantum dots
J. Keski-Rahkonen, P. J. J. Luukko, L. Kaplan +2
Quantum scars are enhancements of quantum probability density along classical periodic orbits. We study the recently discovered phenomenon of strong, perturbation-induced quantum s…