- Black Holes and Theoretical Physics
- Quantum many-body systems
- Cosmology and Gravitation Theories
- Quantum and electron transport phenomena
- Advanced Thermodynamics and Statistical Mechanics
- Noncommutative and Quantum Gravity Theories
- Quantum Electrodynamics and Casimir Effect
- Quantum, superfluid, helium dynamics
- Particle physics theoretical and experimental studies
- Relativity and Gravitational Theory
- Physics of Superconductivity and Magnetism
- Quantum Information and Cryptography
Indian Institute of Technology Madras
2020-2025
We obtain an action for a generalized conformal mechanics (GCM) coupled to Jackiw-Teitelboim (JT) gravity from double scaling limit of the motion charged massive particle in near-horizon geometry spherical black hole. When JT is treated classical approximation, backreaction particle’s wave function on time-reparametrization mode (and therefore bulk metric) vanishes while symmetry GCM reparametrized state-dependent way. also construct semi-classical Hilbert space full theory by explicitly...
The quantum null energy condition (QNEC) is a lower bound on the energy-momentum tensor in terms of variation entanglement entropy subregion along direction. To gain insights into thermodynamics many-body systems, we study if QNEC restricts irreversible production quenches driven by inflow from an infinite memoryless bath two-dimensional holographic theories. We find that increase both and temperature, as implied Clausius inequality classical thermodynamics, necessary but not sufficient to...
Investigating principles for storage of quantum information at finite temperature with minimal need active error correction is an area research. We bear upon this question in two-dimensional holographic conformal field theories via the null energy condition that we have shown earlier to implement restrictions imposed by thermodynamics on such many-body systems. study explicit encoding a logical qubit into two similar chirally propagating excitations von Neumann entropy background whose...
We introduce a stabilizer code model with qutrit at every edge on square lattice and noninvertible plaquette operators. The degeneracy of the ground state is topological as in toric code, it also has usual deconfined excitations consisting pairs electric magnetic charges. However, there are novel types confined fractonic composed cluster adjacent faces vanishing flux. They manifest confinement, even larger configurations these fractons fully immobile although they acquire emergent internal...
A bstract We study how the black hole complementarity principle can emerge from quantum gravitational dynamics within a local semiclassical approximation. Further developing and then simplifying microstate model based on fragmentation instability of near-extremal hole, we find that key to replication (but not cloning) infalling information is decoupling various degrees freedom. The matter decouples interior retaining residual time-dependent state in hair which encodes initial...
Black holes past their Page times should act as efficient scramblers and information mirrors. The of the infalling bits are rapidly encoded by old black hole in Hawking quanta, but it take time that is exponential entropy to decode interior. Motivated features fragmentation instability near-extremal holes, we construct a simple phenomenological model lattice interacting nearly $AdS_2$ throats with gravitational hair charges propagating over lattice. We study microstate solutions response...
Utilizing quantum information theory, it has been shown that irreversible entropy production is bounded from both below and above in physical processes. Both these bounds are positive generalize the Clausius inequality. Such are, however, obtained distance measures space of states, which hard to define compute field theories. We show null energy condition (QNEC) can be utilized obtain lower upper on for quenches leading transitions between thermal states carrying uniform momentum density two...
We obtain an action for a generalized conformal mechanics (GCM) coupled to Jackiw-Teitelboim (JT) gravity from double scaling limit of the motion charged massive particle in near-horizon geometry near-extremal spherical black hole. When JT is treated classical approximation, backreaction particle's wavefunction on time-reparametrization mode (and therefore bulk metric) vanishes while symmetry GCM reparametrized state-dependent way. also construct semi-classical Hilbert space full theory by...
We study how the black hole complementarity principle can emerge from quantum gravitational dynamics within a local semiclassical approximation. Further developing and then simplifying microstate model based on fragmentation instability of near-extremal hole, we find that key to replication (but not cloning) infalling information is decoupling various degrees freedom. The matter decouples interior retaining residual time-dependent state in hair which encodes initial non-isometrically....
We introduce a stabilizer code model with qutrit at every edge on square lattice and non-invertible plaquette operators. The degeneracy of the ground state is topological as in toric code, it also has usual deconfined excitations consisting pairs electric magnetic charges. However, there are novel types confined fractonic composed cluster adjacent faces (defects) vanishing flux. They manifest confinement, even larger configurations these fractons fully immobile although they acquire emergent...
Investigating principles for storage of quantum information at finite temperature with minimal need active error correction is an area research. We bear upon this question in two-dimensional holographic conformal field theories via the null energy condition (QNEC) that we have shown earlier to implement restrictions imposed by thermodynamics on such many-body systems. study explicit encoding a logical qubit into two similar chirally propagating excitations von-Neumann entropy background...