Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 8 of 8 for “"ultrastrong coupling"”.
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Multimode Ultrastrong Coupling with FW-BICs in THz Metasurface
… systems, that show the phenomena of ultra strong coupling (USC), have applications in nonlinear harmonic generation, low loss on-chip communication, and will be critical for quantum computing architectures including the growing sector of quantum information technology. USC can be achieved by …
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Numerical analysis for quantum electrodynamics in the ultrastrong coupling regime
… and enhanced controllability of qubit couplings. Addressing these challenges necessitates accurate simulations of quantum devices, beginning with the foundational task of properly selecting or deriving the Hamiltonian that faithfully represents the underlying physical system. This …
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Quantum Semiconductor Structures Dressed with Terahertz Cavity Photons
… condensed matter cQED, i.e., studies of coherent coupling of solids with cavity photons. Because of the giant dipole moments associated with resonances in solids, compared to atomic dipoles, uncharted regimes of strong and ultrastrong coupling are currently explored in various systems, which in …
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Quantum information processing with geometric phases, cavity magnonics, and semiconductor nanostructures
… band minima of silicon. We also study the ultrastrong coupling of light and matter, which can occur in various physical systems such as cavity magnonics and semiconductor nanostructures. Notably, the ultrastrong coupling regime allows for faster quantum information transduction and the …
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Nanoscale light-matter interaction of ultrathin materials
… Rabi splittings beyond 100 meV in the strong coupling regime flanking a weakly coupled bright exciton peak. We proceed by deriving an analytical, simplified version of the momentum-resolved Maxwell-Bloch equations: a three‐coupled‐oscillator model in which all coupling constants are expressed …
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Bridging infrared and visible light with nano-optics
… the visible and IR ranges through ultra-strong coupling of collective plasmons with light. Such metafilms exhibit record-breaking enhancements in IR optical properties and enable the development of chip-scale visible-IR sensors. Finally, my research explores the use of simple gratings to achieve …
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Phase Transitions in Dipole-Dipole Interacting Atomic Systems
… by controlling the polarization angle. In the ultrastrong coupling limit, the system simplifies to a frustrated extended axial Ising model. For the small coupling limit, a qualitative discussion of the ordering behavior using effective field theory arguments is provided. We show that when the …
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Dinamica effettiva di sistemi quantistici driven chiusi e aperti
… harmonic where at least for one atom the coupling is ultrastrong coupling. This is a necessary condition to perform a routing operation in a modular quantum architecture when scaling to a large number N of target qubits. We obtain an effective Hamiltonian that accounts for the …