Quantum metasurface for multiphoton interference and state reconstruction.

Metasurfaces based on resonant nanophotonic structures have enabled innovative types of flat-optics devices that often outperform the capabilities of bulk components, yet these advances remain largely unexplored for quantum applications. We show that nonclassical multiphoton interferences can be achieved at the subwavelength scale in all-dielectric metasurfaces. We simultaneously image multiple projections of quantum states with a single metasurface, enabling a robust reconstruction of amplitude, phase, coherence, and entanglement of multiphoton polarization-encoded states.

Direct characterization of a nonlinear photonic circuit's wave function with laser light.

Integrated photonics is a leading platform for quantum technologies including nonclassical state generation, demonstration of quantum computational complexity and secure quantum communications. As photonic circuits grow in complexity, full quantum tomography becomes impractical, and therefore an efficient method for their characterization is essential. Here we propose and demonstrate a fast, reliable method for reconstructing the two-photon state produced by an arbitrary quadratically nonlinear optical circuit.

Two-photon tomography using on-chip quantum walks.

We present an approach to quantum tomography based on first expanding a quantum state across extra degrees of freedom and then exploiting the introduced sparsity to perform reconstruction. We formulate its application to photonic circuits and show that measured spatial photon correlations at the output of a specially tailored discrete-continuous quantum walk can enable full reconstruction of any two-photon spatially entangled and mixed state at the input. This approach does not require any tunable elements, so it is well suited for integration with on-chip superconducting photon detectors.

Using the patient-centred medicine clinical framework to better appreciate and explore the many barriers to care in type 2 diabetes.

There are many barriers to diabetes care. This paper explores whether organising these barriers to Type 2 diabetes care within the clinical framework of patient-centred medicine (PCM) enables a better appreciation and conceptualisation of these barriers. The terms 'diabetes', 'barriers to care', 'self-management', 'patient-centred care' and 'outcome assessment' were used to identify 28 articles describing multiple barriers (minimum of three) to care in Type 2 diabetes.

A patient-centred clinical approach to diabetes care assists long-term reduction in HbA1c.

Introduction: Patient-centred care has proven to be cost-effective, with a positive impact on health outcomes. A patient-centred approach is recognised as a desirable component of diabetes care.

Aim: The aim of this audit was to determine if the specific patient-centred intervention offered by a clinical service (GPSI Diabetes service) improves diabetes care, as measured by changes in glycosylated haemoglobin (HbA1c).

Understanding barriers to glycaemic control from the patient's perspective.

Introduction: To better understand barriers to glycaemic control from the patient's perspective.

Methods: An interpretative phenomenological approach was used to study the experiences of 15 adults with Type 2 diabetes. Participants each gave a semi-structured interview of their experiences of living with diabetes.

Assessing long-term effects of trauma: diagnosing symptoms of avoidance and numbing.

Objective: This study compared the discovery of posttraumatic stress disorder (PTSD) symptoms by means of the Structured Clinical Interview for DSM-III-R (SCID) with a semistructured, psychodynamic clinical interview in a long-term follow-up of the survivors of the Buffalo Creek (W.Va.) flood.

Portraits of survival. A twenty-year follow-up of the children of Buffalo Creek.

This study is a follow-up of the children of Buffalo Creek "hollow" who survived the dam collapse and flood of 1972. It was conceived as a complement to the 1988 NIMH-funded follow-up investigation of the children of Buffalo Creek conducted by the University of Cincinnati Traumatic Stress Study Center. That 1988 study utilized standardized methodology to assess levels of psychopathology present among those who were children at the time of the 1972 flood.

Psychotherapy with survivors of the Beverly Hills Supper Club fire.

Thirty psychotherapies with survivors of a devastating supper club fire were studied. Treatments were judged in terms of level of completeness, traumatic symptomatology, therapist experience, and therapist sensitivity to the particular disaster influenced level of completion. Nodal points, such as engagement, dosage of affect, and management of transference are described, and case illustrations provided.

Disaster at Buffalo Creek. Family and character change at Buffalo Creek.

Psychiatric evaluation teams used observations of family interaction and psychoanalytically oriented individual interviews to study the psychological aftereffects of the 1972 Buffalo Creek disaster, a tidal wave of sludge and black water released by the collapse of a slag waste dam. Traumatic neurotic reactions were found in 80% of the survivors. Underlying the clinical picture were unresolved grief, survivor shame, and feelings of impotent rage and hopelessness.