65 citations · 395 across the 17 of their papers we have counts for
17 papers
Self-interactions of ULDM to the rescue?
Bihag Dave, Gaurav Goswami
One of the most important questions in cosmology is concerning the fundamental nature of dark matter (DM). DM could consist of spinless particles of very small mass i.e. $m \sim 10…
Extracting the effective contact rate of COVID-19 pandemic
Gaurav Goswami, Jayanti Prasad, Mansi Dhuria
In the absence of any available vaccines or drugs, prevention of the spread of Coronavirus Disease 2019 (COVID-19) pandemic is being achieved by putting many mitigation measures in…
Swampland, Axions and Minimal Warm Inflation
Suratna Das, Gaurav Goswami, Chethan Krishnan
Warm inflation has been noted previously as a possible way to implement inflationary models compatible with the dS swampland bounds. But often in these discussions the heat bath dy…
Trans-Planckian Censorship Conjecture and Non-thermal post-inflationary history
Mansi Dhuria, Gaurav Goswami
The recently proposed Trans-Planckian Censorship Conjecture (TCC) can be used to constrain the energy scale of inflation. The conclusions however depend on the assumptions about po…
Enhancement of axion decay constants in type IIA theory?
Gaurav Goswami
We investigate the possibility of enhancement of effective axion decay constant in well controlled constructions in string theory. To this end, we study the dynamics of axions aris…
Unravelling Robustness of Deep Learning based Face Recognition Against Adversarial Attacks
Gaurav Goswami, Nalini Ratha, Akshay Agarwal +2
Deep neural network (DNN) architecture based models have high expressive power and learning capacity. However, they are essentially a black box method since it is not easy to mathe…
Revisiting CMB constraints on Warm Inflation
Richa Arya, Arnab Dasgupta, Gaurav Goswami +2
We revisit the constraints that Planck 2015 temperature, polarization and lensing data impose on the parameters of warm inflation. To this end, we study warm inflation driven by a…
Extranatural Inflation Redux
Mansi Dhuria, Gaurav Goswami, Jayanti Prasad
The success of a given inflationary model crucially depends upon two features: its predictions for observables such as those of the Cosmic Microwave background (CMB) and its insens…
Constraints on cosmological viscosity and self interacting dark matter from gravitational wave observations
Gaurav Goswami, Girish Kumar Chakravarty, Subhendra Mohanty +1
It has been shown that gravitational waves propagate through ideal fluids without experiencing any dispersion or dissipation. However, if the medium has a non-zero shear viscosity…
Perturbativity, vacuum stability and inflation in the light of 750 GeV diphoton excess
Mansi Dhuria, Gaurav Goswami
The recent observation of the 750 GeV diphoton excess at 13 TeV LHC has motivated many scenarios of physics beyond the Standard Model. In this work, we begin by showing that many m…
Constraints on just enough inflation preceded by a thermal era
Suratna Das, Gaurav Goswami, Jayanti Prasad +1
If the inflationary era is preceded by a radiation dominated era in which the inflaton too was in thermal equilibrium at some very early time then the CMB data places an upper boun…
Revisiting a pre-inflationary radiation era and its effect on the CMB power spectrum
Suratna Das, Gaurav Goswami, Jayanti Prasad +1
We revisit the scenario where inflation is preceded by a radiation era by considering that the inflaton too could have been in thermal equilibrium early in the radiation era. Hence…
Primordial power spectrum features and consequences
Gaurav Goswami
The present Cosmic Microwave Background (CMB) temperature and polarization anisotropy data is consistent with not only a power law scalar primordial power spectrum (PPS) with a sma…
Higgs instability and de Sitter radiation
Gaurav Goswami, Subhendra Mohanty
If the Standard Model (SM) of elementary particle physics is assumed to hold good to arbitrarily high energies, then, for the best fit values of the parameters, the scalar potentia…
On counterterms in cosmological perturbation theory
Gaurav Goswami
Cosmological perturbation theory is the theory of fluctuations (scalar as well as tensor) around the inflationary cosmological background solution. It is important to understand th…
Maximum Entropy deconvolution of Primordial Power Spectrum
Gaurav Goswami, Jayanti Prasad
It is well known that CMB temperature anisotropies and polarization can be used to probe the metric perturbations in the early universe. Presently, there exist neither any observat…
Power spectrum nulls due to non-standard inflationary evolution
Gaurav Goswami, Tarun Souradeep
The simplest models of inflation based on slow roll produce nearly scale invariant primordial power spectra (PPS). But there are also numerous models that predict radically broken…