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.
Results
Showing 1 to 3 of 3 for “"Loschmidt echo"”.
-
Charge Echo In An Electron Gas
<p>In this work, we investigate the charge, or Loschmidt echo of a system of spinless electrons described by a simple tight-binding Hamiltonian. For this system it is possible to construct a unitary operator, T, that reverses the time evolution of the electron degrees of freedom. The electron gas …
-
Scalable approaches to the characterization of open quantum system dynamics
… We first study the fidelity decay (also called Loschmidt echo) of the system, for many steps under the progressive randomization due to a one-qubit twirl. We show how this quantity encodes useful information about the process begin twirled. We then present a method to measure the magnitude of …
-
Quantum quench dynamics and entanglement
… critical chains at their ends. The Loschmidt echo which measures the similarity between the evolved state and the initial one decays with a power law, whose exponent is the scaling dimension of the defect (junction). Among other conclusions, we see that the local quench dynamics …