6 papers
The Carrollian Kaleidoscope
Arjun Bagchi, Aritra Banerjee, Prateksh Dhivakar +2
The Carroll group arises in the vanishing speed of light limit of the Poincaré group and was initially discarded as just a mathematical curiosity. However, recent developments hav…
Carroll fermions, expansions and the lightcone
Arjun Bagchi, Saikat Mondal
We investigate fermions on Carrollian manifolds. We complement previous intrinsic analysis by deriving Carrollian fermion actions from a relativistic Dirac theory via a systematic…
The Tensionless Lives of Null Strings
Arjun Bagchi, Aritra Banerjee, Ritankar Chatterjee +1
The tensionless limit probes the very high energy regime of string theory in contrast to the well studied point-particle limit which reduces to Einstein gravity. Tensionless string…
Scalar fields and 3D Flat Space Cosmologies
Arjun Bagchi, Supratik Biswas, Astha Kakkar +1
Flat Space Cosmologies (FSC) are time-dependent solutions in Einstein gravity in three-dimensional (3D) spacetimes with zero cosmological constant. These are orbifolds of 3D flat s…
Strings, Virasoro Sandwiches and Worldsheet Horizons
Arjun Bagchi, Aritra Banerjee, Ida M. Rasulian +1
We revisit the canonical quantization of free bosonic closed string theory and observe that the physicality of states requires vanishing of the worldsheet Virasoro algebra generato…
Emergent Carroll symmetry at phase separation in one-dimensional lattice systems
Sourav Biswas, Ashutosh Dubey, Saikat Mondal +3
Asymptotic behavior of generic Tomonaga-Luttinger liquid in the vicinity of phase-separated regions is known to produce an instability where well-known relativistic Conformal Field…