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The giant acoustic atom -- a single quantum system with a deterministic time delay
Lingzhen Guo, Arne Grimsmo, Anton Frisk Kockum +2
We investigate the quantum dynamics of a single transmon qubit coupled to surface acoustic waves (SAWs) via two distant connection points. Since the acoustic speed is five orders o…
Leggett--Garg inequality violations with a large ensemble of qubits
Neill Lambert, Kamanasish Debnath, Anton Frisk Kockum +3
We investigate how discrete internal degrees of freedom in a quasi-macroscopic system affect the violation of the Leggett--Garg inequality, a test of macroscopic-realism based on t…
Cutting Feynman Loops in Ultrastrong Cavity QED: Stimulated Emission and Reabsorption of Virtual Particles Dressing a Physical Excitation
Omar Di Stefano, Roberto Stassi, Luigi Garziano +3
In quantum field theory, bare particles are dressed by a cloud of virtual particles to form physical particles. The virtual particles affect properties such as the mass and charge…