8/5/2023 0 Comments Phase transitions![]() Loschmidt echo in many-spin systems: a quest for intrinsic decoherence andĮmergent irreversibility, PR Zangara and HM Pastawski. (2020-in press) arXiv 1902.06628ĬM Sánchez, AK Chattah, KX Wei, L Buljubasich, P Cappellaro, and HM Pastawski, Emergent perturbation independent decay of the Loschmidt echo in a many-body GA Álvarez, EP Danieli, PR Levstein, and HM Pastawski. Environmentally induced quantum dynamical phase transition in the spin Attenuation of polarization echoes in NMR: A test for the emergence ofĭynamical Irreversibility in Many-Body Quantum Systems. This intrinsic irreversibility, shows that one should be careful in applying the Schrödinger Equation to many-body systems in the thermodynamic limit. However, when the Hamiltonian strength is weak respect to uncontrollable residual interactions, Loschmidt Echo experiments reveals that dynamical transition from a reversible dynamics to an irreversible one whose time constant is fixed by the Hamiltonian itself, not by the residual interactions. Phase Transitions List of issues Browse the list of issues and latest articles from Phase Transitions. The left and right columns show the system’s spectra on both sides of the transitions, while the. B) A dipolar scaled dynamics, which is seen as an apparent spin-diffusion through the study of Out of Time Order Correlations (OTOCs) associated with collective polarization. Figure shows a variety of phase transition behaviours in Hermitian and non-Hermitian systems. Phase transitions can have a wide variety of important implications including the formation of topological defects - cosmic strings, domain walls, monopoles and. We have addressed two phenomena: A) the polarization a spin dimmer, may have a Rabi oscillation that becomes an overdamped polarization transfer when the interaction with a spin environment becomes enough strong as compared with the Rabi frequency. ![]() This is possible because this technique addresses spins in the thermodynamic limit. ![]() In recent years, Solid State Nuclear Magnetic Resonance (NMR) has given us the chance to observe surprising dynamical emergent phenomena. Pastawski, Universidad Nacional de Córdoba, Argentina, ![]()
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