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The Quantum Approximate Optimization Algorithm performance with low entanglement and high circuit depth Open
Variational quantum algorithms constitute one of the most widespread methods for using current noisy quantum computers. However, it is unknown if these heuristic algorithms provide any quantum-computational speedup, although we cannot simu…
Non-Markovian Steady States of a Driven Two-Level System Open
We show that an open quantum system in a non-Markovian environment can reach steady states that it cannot reach in a Markovian environment. As these steady states are unique for the non-Markovian regime, they could offer a simple way of de…
Engineering the level structure of a giant artificial atom in waveguide quantum electrodynamics Open
Engineering light-matter interactions at the quantum level has been central to the pursuit of quantum optics for decades. Traditionally, this has been done by coupling emitters, typically natural atoms and ions, to quantized electromagneti…
Synthesizing electromagnetically induced transparency without a control field in waveguide QED using small and giant atoms Open
The absorption of photons in a three-level atom can be controlled and manipulated by applying a coherent drive at one of the atomic transitions. The situation where the absorption is fully canceled, and the atom thus has been turned comple…
Synthesizing electromagnetically induced transparency without a control\n field in waveguide QED using small and giant atoms Open
The absorption of photons in a three-level atom can be controlled and\nmanipulated by applying a coherent drive at one of the atomic transitions. The\nsituation where the absorption is fully canceled, and the atom thus has been\nturned com…
Cavity-free vacuum-Rabi splitting in circuit quantum acoustodynamics Open
Artificial atoms coupled to surface acoustic waves (SAWs) have played a\ncrucial role in the recent development of circuit quantum acoustodynamics\n(cQAD). In this paper, we have investigated the interaction of an artificial\natom and SAWs…