A report on the nonlinear squeezed states and their non-classical properties of a generalized isotonic oscillator

We construct nonlinear squeezed states of a generalized isotonic oscillator potential. We demonstrate the non-existence of dual counterpart of nonlinear squeezed states in this system. We investigate statistical properties exhibited by the squeezed states, in particular Mandel's parameter, second-order correlation function, photon number distributions and parameter $A_3$ in detail. We also examine the quadrature and amplitude-squared squeezing effects. Finally, we derive expression for the $s$-parameterized quasi-probability distribution function of these states. All these information about the system are new to the literature.Comment: Accepted for publication in J. Phys. A: Math. Theo

Needs, beliefs and barriers for contraceptive use among women in a low resource setting in Tamil Nadu: a qualitative study

Background: The decline in fertility rate based on the National Health Profile is attributed to the choice of permanent sterilisation as the preferred method of contraception among Indian women. The uptake of spacing methods has declined over the years in many parts of India related to low awareness about options other than sterilisation. Hence understanding the needs, beliefs and barriers of women regarding contraceptive use can identify the factors behind their choice of contraceptive methods. This study aims to explore the needs, beliefs and barriers of women in using different methods of contraception in a low-resource area of urban Vellore, Tamil Nadu.Methods: A qualitative study was conducted in three underserved areas of urban Vellore served by the secondary care hospital of a private academic institution. A descriptive qualitative method was chosen. Focus group discussion was carried out among study participants. Thematic analysis was used to analyse data.Results: The need for contraceptive use was felt after completing the families determining the type of method chosen. Fear of impending side-effects of commonly available spacing methods of contraception limited their use. The results highlight the forceful use of intra-uterine device among study participants reflecting the incentive-based family planning services implemented in most Indian states.Conclusions: Our study reinforces that neither the availability of contraceptives nor forceful implementation of policies will increase the utilisation of contraceptives. There is a need for community-based education on the indications, types and side-effects of reversible methods of contraception