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VECTOR SUM. “The interplay between gravity (which is inherently attractive) and background space- time sets up the analogue contact forces, purely repulsive or attractive, frictional or frictionless. In our analogy it is not necessary to add any tensorial polarization field due to bound vector charges as in the VCT.” https://lnkd.in/dusKMKM View in LinkedIn

COSMIC LENSING. “A further interesting aspect of this correspondence is the analogue lensing in a photo-elastic material. The physical measurable quantities in this scenario are the correlators of refractive index which depend on the central difference rather than an absolute measure.” https://lnkd.in/dusKMKM View in LinkedIn

A wild garlic blossom, pure and relatively unscented. View in LinkedIn

EXTRAORDINARY LEADERSHIP. “New Zealand aims to create smoke-free generation. Proposals include making sale of cigarettes to anyone born after 2004 illegal. The plan will begin the final demise of tobacco products in this country.” I usually do not comment on politics, but this is different. https://lnkd.in/dNJBbAP View in LinkedIn

COSMOLOGY. “In the physical universe, the vector mode dies out fast due to the expanding spacetime. In the analogue gravity/cosmology situation addressed here, even though we are dealing with a contracting spacetime, we are at liberty to ignore the vector mode in the first place without altering the curl-free and non zero trace condition of χij.” https://lnkd.in/dusKMKM View in LinkedIn

A WORLD IN A GRAIN OF SAND. “The two scalar modes Ψ and Φ, relevant for cosmological observations in the physical universe, play an important role in the gravity analogue for granular matter. We fo- cus on the effect of external stress perturbations on the changes in the analogue spatial geometry.” https://lnkd.in/dusKMKM View in LinkedIn

SHEAR STRESS. “Clearly, the shear stress has been applied on an already spontaneously jammed isotropic state, to show that anisotropic structure formation results because of this external stress perturbation. This implies that, in the gravity analogue as per the Rachaudhuri equation, θ(0) < 0, so that we have a convergent geodesic congruence.” https://lnkd.in/dusKMKM View in LinkedIn

GRANULAR SAND. “Granular media are known to exhibit a richer variety of density fluctuations under externally applied stress, especially a shear stress.” https://lnkd.in/dusKMKM View in LinkedIn

RESPONSE TO PAPER. “As for reactions, it's really a mixed bag. We've had very positive reactions from a small number of young aficionados of granular matter, who've thought our proposed analogy as `very, very interesting'. On the other hand, senior experts appear to be much less enthusiastic and even skeptical. This isn't surprising, given that in today's world people are concerned about their own niches, and losing even an inch of their domain to a group of novices isn't welcome. The paper isn't published yet, but the fight with reviewers is on, so lets see. With our best wishes, Partha (Majumdar).” View in LinkedIn

BLACK HOLE FORMATION. “A more realistic situation for appearance of trapped surfaces is gravitational collapse. Here, the stress-energy tensor vanishes outside the boundary of the collapsing body (assumed spherical for simplicity).” https://lnkd.in/dusKMKM View in LinkedIn