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20 papers · 2 filters
Fermion Sampling: a robust quantum computational advantage scheme using fermionic linear optics and magic input states
Michał Oszmaniec, Ninnat Dangniam, Mauro E. S. Morales +1
Fermionic Linear Optics (FLO) is a restricted model of quantum computation which in its original form is known to be efficiently classically simulable. We show that, when initializ…
Collective self-trapping of atoms in a cavity
A. Dombi, T. W. Clark, F. I. B. Williams +5
We experimentally demonstrate optical dipole trapping of a cloud of cold atoms by means of a dynamically coupled mode of a high-finesse cavity. We show that the trap requires a col…
Optimal collection of radiation emitted by a trapped atomic ensemble
A. Kurkó, P. Domokos, A. Vukics +4
Trapped atomic ensembles are convenient systems for quantum information storage in the long-lived sublevels of the electronic ground state and its conversion to propagating optical…
Quantum Distance to Uncontrollability and Quantum Speed Limits
Daniel Burgarth, Jeff Borggaard, Zoltán Zimborás
Distance to Uncontrollability is a crucial concept in classical control theory. Here, we introduce Quantum Distance to Uncontrollability as a measure how close a universal quantum…
Quantum Optimization for the Graph Coloring Problem with Space-Efficient Embedding
Zsolt Tabi, Kareem H. El-Safty, Zsófia Kallus +4
Current quantum computing devices have different strengths and weaknesses depending on their architectures. This means that flexible approaches to circuit design are necessary. We…
Superradiance from non-ideal initial states -- a quantum trajectory approach
Sebastian Fuchs, András Vukics, Stefan Yoshi Buhmann
Collective emission behavior is usually described by the decay dynamics of the completely symmetric Dicke states. To study a more realistic scenario, we investigate alternative ini…