29 research outputs found
Quantum phase properties of photon added and subtracted displaced Fock states
Quantum phase properties of photon added and subtracted displaced Fock states
(and a set of quantum states which can be obtained as the limiting cases of
these states) are investigated from a number of perspectives, and it is shown
that the quantum phase properties are dependent on the quantum state
engineering operations performed. Specifically, the analytic expressions for
quantum phase distributions and angular distribution as well as measures of
quantum phase fluctuation and phase dispersion are obtained. The uniform phase
distribution of the initial Fock states is observed to be transformed by the
unitary operation (i.e., displacement operator) into non-Gaussian shape, except
for the initial vacuum state. It is observed that the phase distribution is
symmetric with respect to the phase of the displacement parameter and becomes
progressively narrower as its amplitude increases. The non-unitary (photon
addition/subtraction) operations make it even narrower in contrast to the Fock
parameter, which leads to broadness. The photon subtraction is observed to be a
more powerful quantum state engineering tool in comparison to the photon
addition. Further, one of the quantum phase fluctuation parameters is found to
reveal the existence of antibunching in both the engineered quantum states
under consideration. Finally, the relevance of the engineered quantum states in
the quantum phase estimation is also discussed, and photon added displaced Fock
state is shown to be preferable for the task.Comment: Quantum phase properties of an engineered quantum state has been
studied from various perspective
Lower- and higher-order nonclassical properties of photon added and subtracted displaced Fock states
Nonclassical properties of photon added and subtracted displaced Fock states
have been studied using various witnesses of lower- and higher-order
nonclassicality. Compact analytic expressions are obtained for the
nonclassicality witnesses. Using those expressions, it is established that
these states and the states that can be obtained as their limiting cases
(except coherent states) are highly nonclassical as they show the existence of
lower- and higher-order antibunching and sub-Poissonian photon statistics, in
addition to the nonclassical features revealed through the Mandel
parameter, zeros of Q function, Klyshko's criterion, and Agarwal-Tara
criterion. Further, some comparison between the nonclassicality of photon added
and subtracted displaced Fock states have been performed using witnesses of
nonclassicality. This has established that between the two types of
non-Gaussianity inducing operations (i.e., photon addition and subtraction)
used here, photon addition influences the nonclassical properties more
strongly. Further, optical designs for the generation of photon added and
subtracted displaced Fock states from squeezed vacuum state have also been
proposed.Comment: A comparative study of the nonclassicality present in photon added
and subtracted displaced Fock states shows photon addition is generally
preferable nonclassicality inducing operation, while subtraction also has
advantage in some cases over additio
An ovarian mucinous cystadenoma with adnexal tuberculosis: a case report
We report the occurrence of a case of a benign ovarian tumour- mucinous cystadenoma ovary with adnexal tuberculosis. Our case was a middle-aged Indian woman who presented with abdominal distension and discomfort at the gynaecology clinic of M.Y. hospital, Indore. The data were collected by history-taking, clinical examination, laboratory investigations, transabdominal ultrasonographic examination, and by histopathological study of the excised surgical specimen. It was reported as ovarian mucinous cystadenoma with adnexal TB. This case report emphasizes the significance of thorough evaluation of all women presenting with vague abdominal pains and thorough search of any other pathology in the specimen, like in our case it was tuberculosis. With the increasing awareness of such conditions, more and more cases could be detected and reported.
Impact of photon addition and subtraction on nonclassical and phase properties of a displaced Fock state
Various nonclassical and quantum phase properties of photon added then
subtracted displaced Fock state have been examined systematically and
rigorously. Higher-order moments of the relevant bosonic operators are computed
to test the nonclassicality of the state of interest, which reduces to various
quantum states (having applications in quantum optics, metrology and
information processing) in different limits ranging from the coherent
(classical) state to the Fock (most nonclassical) states. The nonclassical
features are discussed using Klyshko's, Vogel's, and Agarwal-Tara's criteria as
well as the criteria of lower- and higher-order antibunching, sub-Poissonian
photon statistics and squeezing. In addition, phase distribution function and
quantum phase fluctuation have been studied. These properties are examined for
various combinations of number of photon addition and/or subtraction and Fock
parameter. The examination has revealed that photon addition generally improves
nonclassicality, and this advantage enhances for the large (small) values of
displacement parameter using photon subtraction (Fock parameter). The
higher-order sub-Poissonian photon statistics is only observed for the odd
orders. In general, higher-order nonclassicality criteria are found to detect
nonclassicality even in the cases when corresponding lower-order criteria
failed to do so. Photon subtraction is observed to induce squeezing, but only
large number of photon addition can be used to probe squeezing for large values
of displacement parameter. Further, photon subtraction is found to alter the
phase properties more than photon addition, while Fock parameter has an
opposite effect of the photon addition/subtraction. Finally, nonclassicality
and non-Gaussianity is also established using function.Comment: Nonclassical and quantum phase properties of photon added then
subtracted displaced Fock state are studied in detai
Cervical Pap smear study and detection of abnormal epithelial lesions and determination of its accuracy by cytohistological correlation in patients of tertiary care teaching hospital in central India
Background: Cervical cancer is the second most common cancer in females and is a major cause of morbidity and mortality. Pap smear is simple, cost effective and sensitive tool for screening of various non-neoplastic and neoplastic lesions of cervix. The objective of this study was to determine the pattern of various cervical smear abnormalities in our center, to study the prevalence of epithelial cell abnormalities in our study population and to determine the accuracy of Pap test by correlating with histopathology.Methods: This was a retrospective study of 7127 cervical pap smears screened and reported at department of pathology, Sri Aurobindo institute of medical sciences Indore, Madhya Pradesh, India during the period of January 2013 to December 2015. Pap smear was done by the conventional method and reporting was done based on the Bethesda system .Emphasis was put on epithelial cell abnormalities and the findings of abnormal epithelial lesions were correlated with histopathology.Results: In this study, the epithelial cell abnormalities constituted 2% of all cases. Low grade squamous intraepithelial lesion was the most common epithelial cell abnormality found in our study group followed by HSIL and then squamous cell carcinoma. About two thirds of the abnormal epithelial lesions were found in the age group above 40 years. Our cytological diagnosis correlated well with histopathology.Conclusions: Pap smear is a cost effective and sensitive screening method for detection of cancerous, pre-cancerous and non-cancerous lesions of cervix
Manipulating nonclassicality via quantum state engineering processes: Vacuum filtration and single photon addition
The effect of two quantum state engineering processes that can be used to
burn hole at vacuum in the photon number distribution of quantum states of
radiation field are compared using various witnesses of lower- and higher-order
nonclassicality as well as a measure of nonclassicality. Specifically, the
witnesses of nonclassical properties due to the effect of vacuum state
filtration and a single photon addition on an even coherent state, binomial
state and Kerr state are investigated using the criteria of lower- and
higher-order antibunching, squeezing and sub-Poissonian photon statistics.
Further, the amount of nonclassicality present in these engineered quantum
states is quantified and analyzed by using an entanglement potential based on
linear entropy. It is observed that all the quantum states studied here are
highly nonclassical, and on many occasions the hole burning processes are found
to introduce/enhance nonclassical features. However, it is not true in general.
The investigation has further revealed that despite the fact that a hole at
vacuum implies a maximally nonclassical state (as far as Lee's nonclassical
depth is used as the quantitative measure of nonclassicality). However, any
particular process of hole burning at vacuum does not ensure the existence of a
particular nonclassical feature. Specifically,lower- and higher-order squeezing
are not observed for photon added even coherent state and vacuum filtered even
coherent state.Comment: Effect of holeburning is studied for various engineered quantum
state
Nintedanib for Systemic Sclerosis-Associated Interstitial Lung Disease
BACKGROUND: Interstitial lung disease (ILD) is a common manifestation of systemic sclerosis and a leading cause of systemic sclerosis-related death. Nintedanib, a tyrosine kinase inhibitor, has been shown to have antifibrotic and antiinflammatory effects in preclinical models of systemic sclerosis and ILD. METHODS: We conducted a randomized, double-blind, placebo-controlled trial to investigate the efficacy and safety of nintedanib in patients with ILD associated with systemic sclerosis. Patients who had systemic sclerosis with an onset of the first non-Raynaud's symptom within the past 7 years and a high-resolution computed tomographic scan that showed fibrosis affecting at least 10% of the lungs were randomly assigned, in a 1:1 ratio, to receive 150 mg of nintedanib, administered orally twice daily, or placebo. The primary end point was the annual rate of decline in forced vital capacity (FVC), assessed over a 52-week period. Key secondary end points were absolute changes from baseline in the modified Rodnan skin score and in the total score on the St. George's Respiratory Questionnaire (SGRQ) at week 52. RESULTS: A total of 576 patients received at least one dose of nintedanib or placebo; 51.9% had diffuse cutaneous systemic sclerosis, and 48.4% were receiving mycophenolate at baseline. In the primary end-point analysis, the adjusted annual rate of change in FVC was 1252.4 ml per year in the nintedanib group and 1293.3 ml per year in the placebo group (difference, 41.0 ml per year; 95% confidence interval [CI], 2.9 to 79.0; P=0.04). Sensitivity analyses based on multiple imputation for missing data yielded P values for the primary end point ranging from 0.06 to 0.10. The change from baseline in the modified Rodnan skin score and the total score on the SGRQ at week 52 did not differ significantly between the trial groups, with differences of 120.21 (95% CI, 120.94 to 0.53; P=0.58) and 1.69 (95% CI, 120.73 to 4.12 [not adjusted for multiple comparisons]), respectively. Diarrhea, the most common adverse event, was reported in 75.7% of the patients in the nintedanib group and in 31.6% of those in the placebo group. CONCLUSIONS: Among patients with ILD associated with systemic sclerosis, the annual rate of decline in FVC was lower with nintedanib than with placebo; no clinical benefit of nintedanib was observed for other manifestations of systemic sclerosis. The adverse-event profile of nintedanib observed in this trial was similar to that observed in patients with idiopathic pulmonary fibrosis; gastrointestinal adverse events, including diarrhea, were more common with nintedanib than with placebo
VARTALAAP - A DISTRIBUTED MULTICAST COMMUNICATION-SYSTEM
With the increasing proliferation of computer networks and distributed systems, there is a growing number of applications using multicast communication. This paper presents the Vartalaap system developed at IIT, Bombay. Vartalaap is an hierarchical distributed system for multicast communication over a network, implemented in a hardware-independent fashion. The multicast is achieved without resorting to unnecessary broadcasting of messages over the network. Issues covered in this paper include the primitives for multicast, the multicast model and the system architecture. We discuss the implementation of Vartalaap and compare it with some other systems. We conclude with a discussion on the limitations of the current implementation and directions for future work
Insurance selling and administration The FSA's high-level approach to regulation
Title from coverSIGLEAvailable from British Library Document Supply Centre- DSC:3423. 77522(160) / BLDSC - British Library Document Supply CentreGBUnited Kingdo
Terminal hemimyelocystocele associated with Chiari II malformation
Terminal myelocystocele (TMC) results from failure of embryonic CSF to drain outside the neural tube creating CSF reservoir within a dorsal meningocele. Association of Chiari II malformation with diastematomyelia and myelocystocele is extremely rare. Myelocystoceles do not have neural tissue so they have good prognosis after treatment, however when associated with hydromelia and Chiari malformation they present with neurological deficits. We present details of a 2 year old female who presented to us with this rare anomaly