Papers by Ahmed Elhalawany
International Orthopaedics
In this work, we propose a theoretical model of two-quantum bit gates for quantum computation usi... more In this work, we propose a theoretical model of two-quantum bit gates for quantum computation using the polarization states of two photons in a microcavity. By letting the two photons interact non-resonantly with four quantum dots inside the cavity, we obtain an effective photon-photon interaction which we exploit for the implementation of an universal XOR gate. The two-photon Hamiltonian is written in terms of the photons' total angular momentum operators and their states are written using the Schwinger representation of the total angular momentum.
BMC Musculoskeletal Disorders
Background Despite multiple published reviews, the optimum method of correction and stabilisation... more Background Despite multiple published reviews, the optimum method of correction and stabilisation of Blount’s disease remains controversial. The purpose of this study is to evaluate the clinical and radiological outcomes of acute correction of late-onset tibial vara by percutaneous proximal tibial osteotomy with circular external fixation using two simple rings. Weighing up the pros and cons and to establish if this method would be the method of choice in similar severe cases especially in a context of limited resources. Methods This study was conducted between November 2016 and July 2020. We retrospectively reviewed the clinical notes and radiographs of 30 patients (32 tibiae) who had correction of severe late-onset tibia vara by proximal tibial osteotomy and Ilizarov external fixator. The mean age at the time of the operation was 16.6 (± 2.7) years (range 13–22). Results The mean proximal tibial angle was 65.7° (± 7.8) preoperatively and 89.8° (± 1.7) postoperatively (p
IEEE Journal of Selected Topics in Quantum Electronics, 2016
Techniques in Orthopaedics
Bone & Joint Open
Aims COVID-19 remains the major focus of healthcare provision. Managing orthopaedic emergencies e... more Aims COVID-19 remains the major focus of healthcare provision. Managing orthopaedic emergencies effectively, while at the same time protecting patients and staff, remains a challenge. We explore how the UK lockdown affected the rate, distribution, and type of orthopaedic emergency department (ED) presentations, using the same period in 2019 as reference. This article discusses considerations for the ED and trauma wards to help to maintain the safety of patients and healthcare providers with an emphasis on more remote geography. Methods The study was conducted from 23 March 2020 to 5 May 2020 during the full lockdown period (2020 group) and compared to the same time frame in 2019 (2019 group). Included are all patients who attended the ED at Raigmore Hospital during this period from both the local area and tertiary referral from throughout the UK Highlands. Data was collected and analyzed through the ED Information System (EDIS) as well as ward and theatre records. Results A total of...
Frontiers in Optics 2014, 2014
We investigate the upconversion emission spectra of Tm 3+ and Yb 3+ codoped: β-NaYF 4-NaYF 4 core... more We investigate the upconversion emission spectra of Tm 3+ and Yb 3+ codoped: β-NaYF 4-NaYF 4 core-shell nanoparticles embedded in plasmonic nanocavities. The results confirm the role of nanocavities in maximizing the conversion efficiency from the NIR to UV.
Journal of Clinical Orthopaedics and Trauma
In this work we present a theoretical model for an electrically injected single photon source at ... more In this work we present a theoretical model for an electrically injected single photon source at room temperature. The source is made of three regions. The region containing the source is n-doped, the middle region is an intrinsic semiconductor heterostructure. The region containing the drain is p-doped. The con guration of the intrinsic region is designed to trap a single
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Papers by Ahmed Elhalawany