Coherent control of electron spin qubits in silicon using a global field

Silicon spin qubits promise to leverage the extraordinary progress in silicon nanoelectronic device fabrication over the past half century to deliver large-scale quantum processors. Despite the scalability advantage of using silicon technology, realising a quantum computer with the millions of qubits required to run some of the most demanding quantum algorithms poses several outstanding challenges, including how to control many qubits simultaneously. Recently, compact 3D microwave dielectric resonators were proposed as a way to deliver the magnetic fields for spin qubit control across an entire quantum chip using only a single microwave source. Although spin resonance of individual electrons in the globally applied microwave field was demonstrated, the spins were controlled incoherently. Here we report coherent Rabi oscillations of single electron spin qubits in a planar SiMOS quantum dot device using a global magnetic field generated off-chip. The observation of coherent qubit control driven by a dielectric resonator establishes a credible pathway to achieving large-scale control in a spin-based quantum computer

Coherent control of electron spin qubits in silicon using a global field

Silicon spin qubits promise to leverage the extraordinary progress in silicon nanoelectronic device fabrication over the past half century to deliver large-scale quantum processors. Despite the scalability advantage of using silicon technology, realising a quantum computer with the millions of qubits required to run some of the most demanding quantum algorithms poses several outstanding challenges, including how to control so many qubits simultaneously. Recently, compact 3D microwave dielectric resonators were proposed as a way to deliver the magnetic fields for spin qubit control across an entire quantum chip using only a single microwave source. Although spin resonance of individual electrons in the globally applied microwave field was demonstrated, the spins were controlled incoherently. Here we report coherent Rabi oscillations of single electron spin qubits in a planar SiMOS quantum dot device using a global magnetic field generated off-chip. The observation of coherent qubit control driven by a dielectric resonator establishes a credible pathway to achieving large-scale control in a spin-based quantum computer

The Effect of Behcet's Disease on Sexual Function and Psychiatric Status of Premenopausal Women

WOS: 000265556500015PubMed: 19040624Little is known about the relationship between Behcet's disease (BD) and female sexual dysfunction (FSD). The aims were to evaluate the prevalence of FSD in premenopausal BD patients and to compare hormonal and psychiatric conditions to healthy subjects. A total of 71 married women with BD and 63 healthy married women between 18 and 44 years old were enrolled into the study. After evaluating detailed history and physical examination, serum steroid hormone levels were measured. Presence of genital ulcerations in physical examination and any medical treatment were recorded in patients. All subjects were asked to complete the Female Sexual Function Index (FSFI) for sexual status and Beck Depression Inventory (BDI) for psychiatric assessment. FSFI and BDI scores and serum sex steroid hormone levels were measured in women with BD and healthy controls. The mean BDI score of patients was significantly greater than that for controls (P = 0.001), and there was a statistically significant difference between BDI scores (Pearson chi(2) = 19.109, P = 0.001). FSD was found in 34 patients with BD (47.9%) and in 11 controls (17.5%). A statistically significant difference was found between the two groups (Pearson chi(2) = 13.855, P = 0.001). While the most common sexual problem in the patients with BD was diminished arousal (n = 49, 69.0%), diminished desire was found in 32 patients (45.1%) and lubrication problems in 36 patients (50.7%). There was a statistically significant negative correlation between BDI and FSFI score in BD patients. On the contrary, there was no relationship between FSFI and presence of genital ulcerations. FSD is more common in BD patients than in healthy subjects. We conclude that depressive mood according to the BDI scale correlates with the sexual status of BD patients, and this may be because of the depressive effect of BD as a chronic disease. Kocak M, Basar MM, Vahapoglu G, Mert HC, and GungorS. The effect of Behcet's disease on sexual function and psychiatric status of premenopausal women. J Sex Med 2009;6:1341-1348

Evaluation of conjunctival morphology in thyroid associated eye disease by use of impression cytology

Thirty-one patients with the diagnosis of thyroid associated eye disease were included in the study Samples were obtained from upper and temporal bulbar conjunctiva of both eyes by cellulose acetate filter paper, Control group included 20 healthy individuals, In patients with thyroid associated eye disease, grade 2 or 3 squamous metaplasia was observed in 32.26% of the samples obtained from upper bulbar conjunctiva, whereas this ratio increased to 82.26% in temporal bulbar area, None of the control cases showed changes of grade 2 or more. The evaluation of cytological changes with respect to clinical findings revealed that the main factor responsible for the cytological findings was inflammatory changes of the conjunctiva, whereas interpalpebral distance and proptosis had only a partial effect

Determination of the etiological organism during acute exacerbations of COPD and efficacy of azithromycin, ampicillin-sulbactam, ciprofloxacin and cefaclor

Acute exacerbations, most of which are due to lower respiratory tract infections, cause great morbidity and mortality in patients with chronic obstructive pulmonary disease (COPD) and most of these are due to lower respiratory tract infections. The aim of this study was to determine the causative organism and the effects of azithromycin, ampicillin sulbactam (sultamicillin), ciprofloxacin and cefaclor monohydrate therapy in COPD. One hundred and six patients with COPD in acute exacerbation were randomized into four groups for empiric antibiotic treatment following lung function tests and sputum examination. The most common strains isolated from sputum were Haemophilus influenzae (30.8%), Streptoccocus pneumoniae (12%) and Moraxella catarrhalis (7.7%). Azithromycin, sultamicillin, ciprofloxacin and cefaclor monohydrate were found to be effective in treating COPD exacerbations

Acute infectious exacerbations in chronic obstructive lung disease and effects of azithromycine, sultamycilline, ciprofloxacin and cefaclor monohydrate Kronik obstruktif akciger hastaligi olgularinda akut infeksiyon doneminde patojen ajanin saptanmasi ve azitromisin, sultamisilin, siprofloksasin ve sefaklor monohidratin etkinligi

Background and Design. Lower respiratory tract infections cause great morbidity and mortality in patients with chronic obstructive pulmonary disease (COPD). The aim of this study was to find out the causative organism and the effects of azithromycine, ampicillin sulbactam (sultamycilline), ciprofloxacin and cefaclor monohydrate therapy in COPD. One hundred and sixteen patients with COPD in acute exacerbation were randomized into four groups for antibiotic treatment following lung function test and sputum. Results. The most common strains were H. influenzae (30.8%), S. pneumoniae (12.0%) and M. catarrhalis (7.7%). Conclusion. H. influenza is the most common causative organism in acute infectious attacks of COPD. Azithromycine, ampicilline sulbactam (Sultamycilline), ciprofloxacin and cefaclor monohydrate are of value in the treatment of acute infectious attacks of COPD