Thema der Dissertation:
Disspative Preparation of Many-Body States
Disspative Preparation of Many-Body States
Abstract: While dissipation is commonly regarded as detrimental to quantum coherence, it can be harnessed as a powerful resource for preparing quantum many-body states. Building on this perspective, we develop and analyze protocols in which engineered system–environment interactions drive a quantum system toward desired target states.
Three complementary approaches are explored. First, engineered measurements are employed to realize quantum Lindblad dynamics with designed quasi-local jump operators. This enables the preparation of ground states of a broad class of many-body Hamiltonians, even in the dilute limit where dissipation acts only locally. These results are analyzed in the context of matrix product states (MPS) and their parent Hamiltonians.
Second, we introduce a universal cooling protocol based on randomized system–meter interactions. Averaging over random parameters yields dynamics that converge to a unique steady state close to the ground state of a target Hamiltonian, largely independent of microscopic details.
Finally, we investigate how coherent driving and interactions modify dissipative dynamics within a "dressed" reservoir engineering framework, demonstrating how tailored Hamiltonian contributions reshape steady states and their convergence properties.
Three complementary approaches are explored. First, engineered measurements are employed to realize quantum Lindblad dynamics with designed quasi-local jump operators. This enables the preparation of ground states of a broad class of many-body Hamiltonians, even in the dilute limit where dissipation acts only locally. These results are analyzed in the context of matrix product states (MPS) and their parent Hamiltonians.
Second, we introduce a universal cooling protocol based on randomized system–meter interactions. Averaging over random parameters yields dynamics that converge to a unique steady state close to the ground state of a target Hamiltonian, largely independent of microscopic details.
Finally, we investigate how coherent driving and interactions modify dissipative dynamics within a "dressed" reservoir engineering framework, demonstrating how tailored Hamiltonian contributions reshape steady states and their convergence properties.
Zeit & Ort
24.04.2026 | 15:30
Hörsaal B (0.1.01)
(Fachbereich Physik, Arnimallee 14, 14195 Berlin)