8 papers
Quantum-Limited Blind Source Separation of Classical Light
Janis Nötzel, Janis Nötzel, Kiran Adhikari
Using the framework of quantum multiparameter estimation, we study the problem of separating independent thermal optical sources mixed by an unknown passive linear transformation,…
Pseudo entropy and topological phases of matter
Pramod Kamal Kharel, Manghang Limbu, Nabaraj Khatri +2
Entanglement entropy has proven to be a powerful probe of phenomena such as quantum chaos and phase transitions. Pseudo entropy is a recently proposed time-like generalization of a…
Cosmological Pseudo-Entropy
Manghang Limbu, Pramod Kamal Kharel, Rohit Bhattarai +1
We study pseudo entropy , a recent generalization of entanglement entropy, for scalar cosmological perturbations in de Sitter space with sound speed $0.024 \leq c_s \l…
Fundamental Limits of Eavesdropper Detection and Localization in Optical Fiber via Stimulated Brillouin Scattering
Kiran Adhikari, Janis Nötzel
Recent work investigated the use of Stimulated Brillouin Scattering (SBS) to measure changes in fiber parameters, thereby enhancing the security of a Quantum Key Distribution (QKD)…
Quantum ramp secret sharing from Haar scrambling
Kiran Adhikari
Quantum information scrambling has emerged as a powerful tool for studying the dynamics of chaotic quantum many-body systems, assessing benchmarking protocols, and even investigati…
Krylov Polynomials and Quantum Query Complexity
Kiran Adhikari
We show that the minimal query complexity for preparing is exactly the optimal polynomial approximation degree of in , where is the spectral meas…