23 citations · 112 across the 24 of their papers we have counts for
25 papers · 1 filter
Non-Markovian and Thermodynamic Signatures in the Classicality Assessment via Kolmogorov Consistency
Arghya Maity, Ahana Ghoshal, Kelvin Onggadinata +1
The Kolmogorov consistency condition (KCC) defines the statistical boundary between classical and quantum dynamics. Its violation signifies the breakdown of a classical Markov desc…
Qubits in second quantisation in fermionic simulators
Ahana Ghoshal, Carlos de Gois, Kiara Hansenne +2
Simulating many-body fermionic systems in conventional qubit-based quantum computers poses significant challenges due to the overheads associated with the encoding of fermionic sta…
Role of phase of optimal probe in noncommutativity vs coherence in quantum multiparameter estimation
Ritopriyo Pal, Priya Ghosh, Ahana Ghoshal +1
Quantum multiparameter estimation offers a framework for the simultaneous estimation of multiple parameters, pertaining to possibly noncommutating observables. While the optimal pr…
Violation of the thermodynamic uncertainty relation in quantum collisional models
Arghya Maity, Ahana Ghoshal
The thermodynamic uncertainty relation (TUR) is a fundamental principle in non-equilibrium thermodynamics that relates entropy production to fluctuations in a system, establishing…
Quantum Heat Transformers
Arghya Maity, Paranjoy Chaki, Ahana Ghoshal +1
We propose a quantum heat transformer (QHT), a quantum thermodynamic device that modulates temperature gradients between two thermal junctions in quantum systems. Functionally, the…
Kerr-type nonlinear baths enhance cooling in quantum refrigerators
Tanaya Ray, Sayan Mondal, Aparajita Bhattacharyya +3
We study the self-contained three-qubit quantum refrigerator, with a three-body interaction enabling cooling of the target qubit, in presence of baths composed of anharmonic quantu…
Availing non-Markovian dynamics in effective negative temperature-based transient quantum Otto engines
Arghya Maity, Ahana Ghoshal
We demonstrate that the efficiency of effective negative temperature-based quantum Otto engines, already known to outperform their traditional counterparts operating with positive-…
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,…
Modified Landauer's principle: How much can the Maxwell's demon gain by using general system-environment quantum state?
Sayan Mondal, Aparajita Bhattacharyya, Ahana Ghoshal +1
The Landauer principle states that decrease in entropy of a system, inevitably leads to a dissipation of heat to the environment. This statement is usually established by consideri…
All multipartite entanglements are quantum coherences in locally distinguishable bases
Ahana Ghoshal, Swati Choudhary, Ujjwal Sen
We find that the m-separability and k-partite entanglement of a multipartite quantum system is correlated with quantum coherence of the same with respect to complete orthonormal ba…
Optimal quantum resource generation in coupled transmons immersed in Markovian baths
Tanaya Ray, Ahana Ghoshal, Debraj Rakshit +1
We analyze the quantum resource generation of capacitively-coupled multilevel transmon circuits surrounded by bosonic baths, within the Markovian limit. In practice, the supercondu…
Transient effects in quantum refrigerators with finite environments
Aparajita Bhattacharyya, Ahana Ghoshal, Ujjwal Sen
We explore a small quantum refrigerator consisting of three qubits, each of which is kept in contact with an environment. We consider two settings: one is when there is necessarily…
Enhancing precision of atomic clocks by tuning disorder in accessories
Aparajita Bhattacharyya, Ahana Ghoshal, Ujjwal Sen
We find that a quantum device having an accessory involving precision measurement can have an enhancement of its metrological precision in estimating an unknown parameter of the qu…
Restoring metrological quantum advantage of measurement precision in noisy scenario
Aparajita Bhattacharyya, Ahana Ghoshal, Ujjwal Sen
We show that in presence of a local and uncorrelated dephasing noise, quantum advantage can be obtained in the Fisher information-based lower bound of the minimum uncertainty in es…
Estimating phase transition of perturbed J1-J2 Heisenberg quantum chain in mixtures of ground and first excited states
Sayan Mondal, George Biswas, Ahana Ghoshal +2
We show that the nearest neighbour entanglement in a mixture of ground and first excited states - a subjacent state - of the J1-J2 Heisenberg quantum spin chain can be used as an o…
Multiparty Spohn's theorem for a combination of local Markovian and non-Markovian quantum dynamics
Ahana Ghoshal, Ujjwal Sen
We obtain a Gorini-Kossakowski-Sudarshan-Lindblad -like master equation for two or more quantum systems connected locally to a combination of Markovian and non-Markovian heat baths…
Isolating noise and amplifying signal with quantum Cheshire cat
Ahana Ghoshal, Soham Sau, Debmalya Das +1
The so-called quantum Cheshire cat is a phenomenon in which an object, identified with a "cat", is dissociated from a property of the object, identified with the "grin" of the cat.…
Invariance of success probability in Grover's quantum search under local noise with memory
Sheikh Parvez Mandal, Ahana Ghoshal, Chirag Srivastava +1
We analyze the robustness of Grover's quantum search algorithm performed by a quantum register under a possibly time-correlated noise acting locally on the qubits. We model the noi…
Correlation between resource-generating capacities of quantum gates
Aparajita Bhattacharyya, Ahana Ghoshal, Ujjwal Sen
We analyze the optimal basis for generating the maximum relative entropy of quantum coherence by an arbitrary gate on a two-qubit system. The optimal basis is not unique, and the h…
Heat current and entropy production rate in local non-Markovian quantum dynamics of global Markovian evolution
Ahana Ghoshal, Ujjwal Sen
We examine the elements of the balance equation of entropy in open quantum evolutions and their response as we go from a Markovian to a non-Markovian situation. In particular, we l…
Three qubits in less than three baths: Beyond two-body system-bath interactions in quantum refrigerators
Ahana Ghoshal, Sreetama Das, Amit Kumar Pal +2
We show that quantum absorption refrigerators, which have traditionally been studied as of three qubits, each of which is connected to a thermal reservoir, can also be constructed…
Quantum thermal transistors: Operation characteristics in steady state versus transient regimes
Riddhi Ghosh, Ahana Ghoshal, Ujjwal Sen
We show that a quantum thermal transistor can also cause the transistor effect - where one out of three terminals can control the flow of heat current in the other two - with good…
Estimating quantum coherence by noncommutativity of any observable and its incoherent part
Tanaya Ray, Ahana Ghoshal, Arun Kumar Pati +1
We establish a lower bound on the quantum coherence of an arbitrary quantum state in arbitrary dimension, using a noncommutativity estimator of an arbitrary observable of sub-unit…
Population inversion and entanglement in single and double glassy Jaynes-Cummings models
Ahana Ghoshal, Sreetama Das, Aditi Sen De +1
We find that a suppression of the collapse and revival of population inversion occurs in response to insertion of Gaussian quenched disorder in atom-cavity interaction strength in…