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 11 of 11 for “"Periodic driving"”.
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Periodic driving and nonreciprocity in cavity optomechanics
… with cavity optomechanical systems subject to periodic driving. We develop a Floquet approach to solve time-periodic quantum Langevin equations in the steady state, show that two-time correlation functions of system operators can be expanded in a Fourier series, and derive a generalized …
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Spectral properties of planar helium under periodic driving
… three body Coulomb problem under electromagnetic driving. Our ab initio approach combines Floquet theory, complex dilation, and the representation of the Hamiltonian in suitably chosen coordinates without adjustable parameters. The resulting complex-symmetric, sparse banded generalized eigenvalue …
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Locally Tuneable Quantum Hamiltonians with Neutral Atoms in Optical Lattices
… on Hamiltonians generated by incorporating time-periodic implementations of these site-dependent potentials. Time dependence adds a new set of control parameters and allows us to break important symmetries in the system. This can yield qualitatively different behaviours that are fundamentally …
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Aeroelastic optimization of thin flapping structure
… parameters, as well as the amplitude of the periodic driving. We demonstrate that the bending stiffness of the structure can be tuned to maximize the output of the generated airflow, while simultaneously minimizing the input power. A design guideline is established for this optimal conditions …
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Phase transitions in quasiperiodic and driven optical lattices
… a novel lattice geometry, and the use of Floquet driving to engineer behaviours qualitatively different from static systems. In particular I will present our work using periodic driving to make a continuous quantum phase transition become discontinuous, which to our knowledge has never been done …
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Chaos and Localisation
… from the interaction with an external time-periodic driving force. In particular two quantum phenomena, which have no counterpart on the classical level, are studied: the suppression of classical diffusion, known as dynamical localisation, and quantum resonances as a regime of enhanced …
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Nonlinear dynamics of a matter-wave soliton in driven potentials
… trapping potential, and subject to weak periodic driving. Such systems have potential applications in metrology, specifically in the use of atom interferometers for high precision inertial and gravitational field sensing. The localised and dynamically robust nature of matter-wave solitons …
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Nonlinear dynamics of a matter-wave soliton in driven potentials
… trapping potential, and subject to weak periodic driving. Such systems have potential applications in metrology, specifically in the use of atom interferometers for high precision inertial and gravitational field sensing. The localised and dynamically robust nature of matter-wave solitons …
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Spontaneous symmetry breaking transport : from anomalous response to chiral separation
… of Brownian particles exposed to symmetric periodic potentials and driven out of equilibrium by symmetric driving forces at several examples. For any non-zero temperature, the average velocity vanishes but there may be dynamical states of sustained transport spontaneously breaking the …
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Phase Transitions in driven 1D and Quasi-Periodic 2D Optical Lattices
… patterns posses long-range order but lack periodicity. This places them in the spectrum of materials between clean, ordered crystals and disordered, amorphous solids. They share properties of both disordered structures and ordered materials, resulting in a rich variety of physical …