14 papers
Scaling vs entanglement in measurement-induced phase transition for non-integrable systems
Paranjoy Chaki, Protyush Nandi, Subinay Dasgupta +1
We find that the measurement-induced phase transition generated by deterministic global measurements, previously observed in the integrable transverse-field Ising model (TFIM), per…
Memory-assisted advantage for state transfer in disordered quantum many-body scar system
Paranjoy Chaki, Ujjwal Sen
We analyze how memory in disorder facilitates quantum communication in many-body scar systems. We consider three distinct types of disorder, viz., memoryful, and memoryless uniform…
Resource generation and dynamical complexities in open random quantum circuits
Paranjoy Chaki, Arkaprava Sil, Priya Ghosh +2
Realistic quantum devices are inherently open and often involve environments with memory. Here, we investigate quantum resource generation in two classes of random circuits, namely…
Disappearance of measurement-induced phase transition in a quantum spin system for large sizes
Paranjoy Chaki, Protyush Nandi, Ujjwal Sen +1
Measurement-induced phase transitions are often studied in random quantum circuits, with local measurements performed with a certain probability. We present here a model where a gl…
Surpassing thermal-state limit in thermometry via non-completely positive quantum encoding
Anindita Sarkar, Paranjoy Chaki, Debarupa Saha +1
Conventional quantum thermometry assumes completely positive (CP) encoding maps, where the probe is initially uncorrelated with the environment. We consider realistic scenarios wit…
Role of energy-invariant assistants in energy extraction from quantum batteries
Paranjoy Chaki, Aparajita Bhattacharyya, Kornikar Sen +1
We investigate the role of energy-invariant assistants in energy extraction from quantum batteries. To this end, for energy extraction, we restrict ourselves to unitaries that join…