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Nilpotent polynomials approach to four-qubit entanglement
A. Mandilara, L. Viola
We apply the general formalism of nilpotent polynomials [Mandilara et al, Phys. Rev. A 74, 022331 (2006)] to the problem of pure-state multipartite entanglement classification in f…
Single-bit Feedback and Quantum Dynamical Decoupling
Francesco Ticozzi, Lorenza Viola
Synthesizing an effective identity evolution in a target system subjected to unwanted unitary or non-unitary dynamics is a fundamental task for both quantum control and quantum inf…
Generalized Coherent States as Preferred States of Open Quantum Systems
Sergio Boixo, Lorenza Viola, Gerardo Ortiz
We investigate the connection between quasi-classical (pointer) states and generalized coherent states (GCSs) within an algebraic approach to Markovian quantum systems (including b…
Generalized Entanglement as a Natural Framework for Exploring Quantum Chaos
Yaakov S. Weinstein, Lorenza Viola
We demonstrate that generalized entanglement [Barnum {\em et al.}, Phys. Rev. A {\bf 68}, 032308 (2003)] provides a natural and reliable indicator of quantum chaotic behavior. Sinc…
Randomized Dynamical Decoupling Techniques for Coherent Quantum Control
Lorenza Viola, Lea F. Santos
The need for strategies able to accurately manipulate quantum dynamics is ubiquitous in quantum control and quantum information processing. We investigate two scenarios where rando…
Enhanced Convergence and Robust Performance of Randomized Dynamical Decoupling
Lea F. Santos, Lorenza Viola
We demonstrate the advantages of randomization in coherent quantum dynamical control. For systems which are either time-varying or require decoupling cycles involving a large numbe…