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The Quantum Vacuum
The vacuum is the lowest energy state of a field in a certain region of space. This definition implies that no particles can be present in the vacuum state. In classical physics, the only features of…
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Hybrid circuit cavity quantum electrodynamics with a micromechanical resonator
TLDR
This is a model system with potential for a quantum interface, which may allow for storage of quantum information in long-lived phonon states, coupling to optical photons or for investigations of strongly coupled quantum systems near the classical limit.
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Dynamical Casimir effect in a Josephson metamaterial
The zero-point energy stored in the modes of an electromagnetic cavity has experimentally detectable effects, giving rise to an attractive interaction between the opposite walls, the static Casimir…
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The Josephson plasmon as a Bogoliubov quasiparticle
We study the Josephson effect in alkali atomic gases within the two-mode approximation and show that there is a correspondence between the Bogoliubov description and the harmonic limit of the phase…
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Observation of the Bloch-Siegert shift in a driven quantum-to-classical transition
We show that the counter-rotating terms of the dispersive qubit-cavity Rabi model can produce relatively large and nonmonotonic Bloch-Siegert shifts in the cavity frequency as the system is driven…
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Quantum systems under frequency modulation
TLDR
The purpose of this review is to present some of the fundamental effects that arise in a quantum system when its transition frequencies are modulated, from two-state atoms and harmonic oscillators to multilevel and many-particle systems.
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Roadmap on STIRAP applications
STIRAP (stimulated Raman adiabatic passage) is a powerful laser-based method, usually involving two photons, for efficient and selective transfer of populations between quantum states. A particularly…
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Autler-Townes effect in a superconducting three-level system.
TLDR
These phenomena in a superconducting Josephson phase qubit, which can be considered an "artificial atom" with a multilevel quantum structure, are observed in a simple three-level Hamiltonian model.
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Entanglement, coherence, and redistribution of quantum resources in double spontaneous down-conversion processes
We study the properties of bi-squeezed tripartite Gaussian states created by two spontaneous parametric down-conversion processes that share a common idler. We give a complete description of the…
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Contact doping, Klein tunneling, and asymmetry of shot noise in suspended graphene
The inherent asymmetry of the electric transport in graphene is attributed to Klein tunneling across barriers defined by $\textit{pn}$-interfaces between positively and negatively charged regions. By…
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