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 7 of 7 for “"effective Hamiltonians"”.
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Compensation of incoherent errors in the precise implementation of effective Hamiltonians for quantum information processing
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2002.
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Quantum Mediated Effective Interactions For Spatially Complex Systems
… of freedom. Chapters 2, 3, 4 and 7 solve model Hamiltonians for quantum spins, where the interactions are boson mediated, and the resulting ground states are spatially complex - meaning that they break translational invariance (some states in Chapter 7 also break time reversal invariance). …
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Stochastic Homogenization of Nonconvex Hamilton-Jacobi Equations in One Dimension
… over large scales. This process results in effective deterministic descriptions, called effective Hamiltonians, which capture the essential behavior of the system. We consider nonconvex Hamilton-Jacobi equations in one space dimension. We provide a fully constructive proof of homogenization, …
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An investigation by electron paramagnetic resonance of the Jahn-Teller effect in LiNbO₃¿:Cu²+
… composed of a doublet and singlet. Further, an effective Hamiltonian (call it Hamiltonian number 4) for defect association is also formulated. The eigenvalue problems for these four effective Hamiltonians are solved using perturbation techniques and their predictions are compared to the EPR …
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Efficient Fock Space Configuration Interaction Approaches For Large Strongly Correlated Systems
… PyFockCI code, avail- able on GitHub. A Bloch effective Hamiltonian formalism is also utilized to extract model Hamiltonian parameters from RAS-1SF calculations, allowing more nuanced studies of the Heisenberg J couplings present in many molecules with magnetically coupled sites. Over- all, our …
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Advances in ab initio approaches to nuclear structure, reaction and nucleonic dynamics
<p>We calculate effective Hamiltonians and effective electroweak operators with the Okubo-Lee-Suzuki formalism for two-nucleon systems. Working within a harmonic oscillator basis, first without and then with a confining harmonic oscillator trap, we demonstrate the effects of renormalization on …
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Interplay Between the Lattice and Spin Degrees of Freedom in Magnetoelectric and Magnetic Materials
… first-principles computational methods, magnetic effective Hamiltonians, and other techniques that are utilized here. The results section of the dissertation can be divided into two parts. The first half focuses on magnetoelectric effects arising from different sources, while the second half is …