6 papers
Noise adaptive two-way secure deterministic quantum key distribution
Abinash Kar, Ayan Patra, Aditi Sen De +1
We introduce noise-adaptive quantum key distribution (QKD) protocols, in which the honest parties optimize the encoding (state preparation) and decoding (measurement basis) operati…
Beating noise in frequency estimation with squeezing and memory in continuous-variable systems
Ayan Patra, Manju, Aditi Sen De +1
Quantum metrology promises precision beyond classical limits, yet environmental noise typically degrades the quantum resources required for such enhancement. In this work, we inves…
Imaginarity-generating power of unitaries: A resource-theoretic approach
Akhil Kumar Awasthi, Mrinmoy Samanta, Sudipta Mondal +2
Imaginarity, stemming from the complex structure of quantum mechanics, has recently emerged as a fundamental resource, yet its dynamical generation remains largely unexplored. In t…
Higher-dimensional BKL dynamics in AdS black holes
Elena Cáceres, Ãngel J. Murcia, Ayan K. Patra +1
Chaotic BKL dynamics provides a canonical description of the approach to spacelike singularities as a sequence of Kasner epochs grouped into eras. While this paradigm is well estab…
Hierarchies of Gaussian multimode entanglement from thermodynamic quantifiers
Mrinmoy Samanta, Sudipta Mondal, Ayan Patra +2
We develop a thermodynamic characterization of multimode entanglement in pure continuous-variable systems by quantifying the gap between globally and locally extractable work (ergo…
Cosmology inside a black hole: adding matter on the brane
José L. F. Barbón, Ayan K. Patra, Juan F. Pedraza +1
Braneworlds inside an AdS black hole provide simple models where a closed cosmology can be encoded in a dual field theory. Previous studies have focused on pure-tension branes, whe…