Demonstration of Floquet engineered non-Abelian geometric phase for holonomic quantum computing

Holonomic quantum computing (HQC) functions by transporting an adiabatically degenerate manifold of computational states around a closed loop in a control-parameter space; this cyclic evolution results in a non-Abelian geometric phase which may couple states within the manifold. Realizing the required degeneracy is challenging, and typically requires auxiliary levels or intermediate-level couplings. One potential way to circumvent this is through Floquet engineering, where the periodic driving of a nondegenerate Hamiltonian leads to degenerate Floquet bands, and subsequently non-Abelian gauge structures may emerge. Here we present an experiment in ultracold $^{87}$Rb atoms where atomic spin states are dressed by modulated RF fields to induce periodic driving of a family of Hamiltonians linked through a fully tuneable parameter space. The adiabatic motion through this parameter space leads to the holonomic evolution of the degenerate spin states in $SU(2)$, characterized by a non-Abelian connection. We study the holonomic transformations of spin eigenstates in the presence of a background magnetic field, characterizing the fidelity of these gate operations. Results indicate that while the Floquet engineering technique removes the need for explicit degeneracies, it inherits many of the same limitations present in degenerate systems

The impact on staff of working with personality disordered offenders: A systematic review

© 2015 Freestone et al. Background: Personality disordered offenders (PDOs) are generally considered difficult to manage and to have a negative impact on staff working with them. Aims: This study aimed to provide an overview of studies examining the impact on staff of working with PDOs, identify impact areas associated with working with PDOs, identify gaps in existing research,and direct future research efforts. Methods: The authors conducted a systematic review of the English-language literature from 1964-2014 across 20 databases in the medical and social sciences. Results: 27 papers were included in the review. Studies identified negative impacts upon staff including: negative attitudes, burnout, stress, negative counter-transferential experiences; two studies found positive impacts of job excitement and satisfaction, and the evidence related to perceived risk of violence from PDOs was equivocal. Studies demonstrated considerable heterogeneity and meta-analysis was not possible. The overall level of identified evidence was low: 23 studies (85%) were descriptive only, and only one adequately powered cohort study was found. Conclusions: The review identified a significant amount of descriptive literature, but only one cohort study and no trials or previous systematic reviews of literatures. Clinicians and managers working with PDOs should be aware of the potential impacts identified, but there is an urgent need for further research focusing on the robust evaluation of interventions to minimise harm to staff working with offenders who suffer from personality disorder Copyright

Jutho/TensorOperations.jl: v4.0.5

TensorOperations v4.0.5 Diff since v4.0.

AlgebraicJulia/Catlab.jl: v0.16.0

<h2>Catlab v0.16.0</h2> <p><a href="https://github.com/AlgebraicJulia/Catlab.jl/compare/v0.15.5...v0.16.0">Diff since v0.15.5</a></p> <p><strong>Merged pull requests:</strong></p> <ul> <li>Delta migration of acset transformations (#710) (@kris-brown)</li> <li>Transformations between acsets involving only combinatorial data (#806) (@kris-brown)</li> <li>Data migrations with Julia functions on attributes (#823) (@KevinArlin)</li> <li>Move acset homomorphism search into own submodule (#843) (@kris-brown)</li> <li>Remove DataMigrations code from Catlab (#846) (@KevinArlin)</li> <li>GATlab integration (#847) (@olynch)</li> <li>Bug fix and tests for <code>to_graphviz</code> with <code>Diagram</code> objects (#850) (@slwu89)</li> <li>Unbreak <code>makemap</code> from <code>attrMigr</code> branch (#854) (@KevinArlin)</li> <li>Consistent whitespace in runtests.jl (#855) (@neonWhiteout)</li> <li>Export named graphs from <code>Catlab.Graphs</code> (#856) (@epatters)</li> <li>Use named graphs API in Graphviz visualization (#858) (@epatters)</li> <li>CompatHelper: add new compat entry for AlgebraicInterfaces at version 0.1, (keep existing compat) (#861) (@algebraicjuliabot)</li> <li>CompatHelper: add new compat entry for GATlab at version 0.0.7, (keep existing compat) (#862) (@algebraicjuliabot)</li> <li>Reexport GATlab (#864) (@epatters)</li> </ul> <p><strong>Closed issues:</strong></p> <ul> <li>Spin out DataMigrations.jl (#842)</li> <li><code>NamedGraph</code> and presentations (#848)</li> <li>Reexport GATlab from Catlab (#863)</li> </ul&gt