3 citations · 8 across the 16 of their papers we have counts for
16 papers
Towards minimal conditions for ergotropy injection in open quantum systems
Deependra Singh, Debarupa Saha, Ujjwal Sen
Interactions between a quantum system and its environment can inject ergotropy into the system, raising the question of the minimal dimensionality and physical resources required f…
Metrological quantum-to-classical crossover in the volume of a noisy quasiperiodic lattice
Priya Ghosh, Debarupa Saha, Ujjwal Sen +1
Localization-delocalization transitions have recently been proposed for building a class of efficient quantum many-body critical sensors. This work scrutinizes metrological perform…
Optimal work extraction in measurement-based quantum Otto engines: Non-adiabaticity and generalized measurements can be beneficial
Arunabha Das, Sayan Mondal, Debarupa Saha +1
Measurement-based quantum heat engines have attracted significant interest as alternatives to conventional thermal engines, as they replace the hot thermal reservoir with quantum m…
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…
Precision Enhancement in Transient Quantum Thermometry:Cold-Probe Bias and Its Removal
Debarupa Saha, Ujjwal Sen
We unveil a fundamental temperature bias in transient quantum thermometry under Markovian dynamics. For qubit probes evolving in a thermal Markovian environment, we prove that tran…
Non-positive measurements aren't beneficial in quantum metrology for unitary encoding, but can be for open schemes
Paranjoy Chaki, Debarupa Saha, Kornikar Sen +1
We investigate whether non-positive operator-valued measurements can be beneficial for quantum metrology. For unitary encoding, we show that non-positive measurements offer no adva…
Isocoherent Work Extraction from Quantum Batteries: Basis-Dependent Response
Shuva Mondal, Debarupa Saha, Ujjwal Sen
We identify a connection between quantum coherence and the maximum extractable work from a quantum battery, and to this end, we define the coherence-constrained maximal work (CCMW)…
Entanglement-Constrained Quantum Metrology: Rapid Low-Entanglement Gains, Tapered High-Level Growth
Debarupa Saha, Ujjwal Sen
It is a specific type of quantum correlated state that achieves optimal precision in parameterestimation under unitary encoding. We consider the potential experimental limitation o…
Unbounded entanglement-sustaining sequential local quantum state discrimination
Debarupa Saha, Priya Ghosh, Kornikar Sen +2
Two pure orthogonal quantum states can be perfectly distinguished by sequential local action of multiple pairs of parties. However, this process typically leads to the complete dis…
Non-Markovianity vs athermality: perturbation-enhanced information backflow
Anindita Sarkar, Debarupa Saha, Ujjwal Sen
Non-Markovianity and athermality are useful resources in quantum technologies, and it is therefore important to understand the relations between the two, for general quantum dynami…
Approximate second laws and energy extraction from quantum batteries
Debarupa Saha, Aparajita Bhattacharyya, Ujjwal Sen
Conservation of energy under thermal operations, \textbf{TO}, is ensured by commutation of the unitary generating such operations with the total Hamiltonian. However in realistic s…
Minimal-error quantum state discrimination versus robustness of entanglement:More indistinguishability with less entanglement
Debarupa Saha, Kornikar Sen, Chirag Srivastava +1
We relate the the distinguishability of quantum states with their robustness of the entanglement, where the robustness of any resource quantifies how tolerant it is to noise. In pa…
Quantum sensing of even- versus odd-body interactions
Aparajita Bhattacharyya, Debarupa Saha, Ujjwal Sen
We analyze the scaling of quantum Fisher information with the number of system particles in the limit of large number of particles, as a function of the number of parties interacti…
Harnessing energy extracted from heat engines to charge quantum batteries
Debarupa Saha, Aparajita Bhattacharyya, Kornikar Sen +1
We explore the performance of three- and two-stroke heat engines with a qutrit working substance in charging two-level quantum batteries. We first classify the heat engines into tw…
Temperature- and interaction-tweaked efficiency boost of finite-time robust quantum Otto engines
Debarupa Saha, Ahana Ghoshal, Ujjwal Sen
We demonstrate that under specific conditions, a finite-time quantum Otto engine, employing a spin-1/2 particle as the working substance, despite undergoing incomplete Otto cycles,…
Entanglement is indispensable for masking arbitrary set of quantum states
Debarupa Saha, Priya Ghosh, Ujjwal Sen
We question the role of entanglement in masking quantum information contained in a set of mixed quantum states. We first show that a masker that can mask any two single-qubit pure…