115 citations · 349 across the 29 of their papers we have counts for
29 papers
Multiple-shot labeling of quantum observables
Seyed Arash Ghoreishi, Nidhin Sudarsanan Ragini, Sk Sazim +1
Quantum labeling tasks ask one to recover the missing associations between classical outcome labels and the effects forming the POVM. We study labeling in the multiple-shot regime,…
Higher-order incompatibility improves distinguishability of causal quantum networks
Nidhin Sudarsanan Ragini, Sk Sazim
Higher-order quantum theory deals with causal quantum processes, described by quantum combs, and test procedures, described by quantum testers, "measuring" these processes. In this…
Certification of multi-qubit quantum systems with temporal inequalities
Gautam Sharma, Chellasamy Jebarathinam, Sk Sazim +1
Demonstrating contextual correlations in quantum theory through the violation of a non-contextuality inequality necessarily needs some ``contexts" and thus assumes some compatibili…
Trade-off between Bagging and Boosting for quantum separability-entanglement classification
Sanuja D. Mohanty, Ram N. Patro, Pradyut K. Biswal +2
Certifying whether an arbitrary quantum system is entangled or not, is, in general, an NP-hard problem. Though various necessary and sufficient conditions have already been explore…
Certification of two-qubit quantum systems with temporal inequality
Chellasamy Jebarathinam, Gautam Sharma, Sk Sazim +1
Self-testing of quantum devices based on observed measurement statistics is a method to certify quantum systems using minimal resources. In Ref. [Phys. Rev. \textbf{A} 101, 032106…
Mermin and Svetlichny inequalities for non-projective measurement observables
Mohd Asad Siddiqui, Sk Sazim
The necessary and sufficient criteria for violating the Mermin and Svetlichny inequalities by arbitrary three-qubit states are presented. Several attempts have been made, earlier,…
A geometric way to find the measures of uncertainty from statistical divergences for discrete and finite probability distributions
Gautam Sharma, Sk Sazim
Exploiting the geometric nature of statistical divergences, we devise a way to define associated induced uncertainty measures for discrete and finite probability distributions. We…
Bloch sphere analog of qudits using Heisenberg-Weyl Operators
Gautam Sharma, Sibasish Ghosh, Sk Sazim
We study an analogous Bloch sphere representation of higher-level quantum systems using the Heisenberg-Weyl operator basis. We introduce a parametrization method that will allow us…
Classical Communications with Indefinite Causal Order for completely depolarizing channels
Sk Sazim, Michal Sedlak, Kratveer Singh +1
If two identical copies of a completely depolarizing channel are put into a superposition of their possible causal orders, they can transmit non-zero classical information. Here, w…
Creation of quantum coherence with general measurement processes
Sanuja D. Mohanty, Gautam Sharma, Sk Sazim +2
Quantum measurement not only can destroy coherence but also can create it. Here, we estimate the maximum amount of coherence, one can create under a complete non-selective measurem…
Robustness of interferometric complementarity under Decoherence
Gautam Sharma, Mohd Asad Siddiqui, Shiladitya Mal +2
Interferometric complementarity is known to be one of the most nonclassical manifestations of the quantum formalism. It is commonly known as wave-particle duality and has been stud…
Role of fine-grained uncertainty in determining the limit of preparation contextuality
Gautam Sharma, Sk Sazim, Shiladitya Mal
The optimal success probability of a communication game sets fundamental limitations on an operational theory. Quantum advantage of parity oblivious random access code (PORAC), a c…
Quantum Coherence, Coherent Information and Information Gain in Quantum Measurement
Gautam Sharma, Sk Sazim, Arun Kumar Pati
A measurement is deemed successful, if one can maximize the information gain by the measurement apparatus. Here, we ask if quantum coherence of the system imposes a limitation on t…
Resource state structure for controlled quantum key distribution
Arpan Das, Sumit Nandi, Sk Sazim +1
Quantum entanglement plays a pivotal role in many communication protocols, like secret sharing and quantum cryptography. We consider a scenario where more than two parties are invo…
Quantifying coherence with quantum addition
Chiranjib Mukhopadhyay, Arun Kumar Pati, Sk Sazim
Quantum addition channels have been recently introduced in the context of deriving entropic power inequalities for finite dimensional quantum systems. We prove a reverse entropy po…
Coherence makes quantum systems 'magical'
Chiranjib Mukhopadhyay, Sk Sazim, Arun Kumar Pati
Two primary facets of quantum technological advancement that hold great promise are quantum communication and quantum computation. For quantum communication, the canonical resource…
Quantum uncertainty relation based on the mean deviation
Gautam Sharma, Chiranjib Mukhopadhyay, Sk Sazim +1
Traditional forms of quantum uncertainty relations are invariably based on the standard deviation. This can be understood in the historical context of simultaneous development of q…
Binegativity of two qubits under noise
Sk Sazim, Natasha Awasthi
Recently, it was argued that the binegativity might be a good quantifier of entanglement for two-qubit states. Like the concurrence and the negativity, the binegativity is also ana…
Tight upper bound for the maximal expectation value of the Mermin operators
Mohd Asad Siddiqui, Sk Sazim
The violation of the Mermin inequality (MI) for multipartite quantum states guarantees the existence of nonlocality between either few or all parties. The detection of optimal MI v…
Coherence of quantum channels
Chandan Datta, Sk Sazim, Arun K. Pati +1
We investigate the coherence of quantum channels using the Choi-Jamiołkowski isomorphism. The relation between the coherence and the purity of the channel respects a duality relati…
Mutual Uncertainty, Conditional Uncertainty and Strong Sub-Additivity
Sk Sazim, Satyabrata Adhikari, Arun K. Pati +1
We introduce a new concept called as the mutual uncertainty between two observables in a given quantum state which enjoys similar features like the mutual information for two rando…
Quantum mutual information and quantumness vectors for multi-qubit systems
Sk Sazim, Pankaj Agrawal
We introduce a new information theoretic measure of quantum correlations for multiparticle systems. We use a form of multivariate mutual information -- the interaction information…
Quantum Coherence Sets The Quantum Speed Limit For Mixed States
Debasis Mondal, Chandan Datta, Sk Sazim
We cast observable measure of quantum coherence or asymmetry as a resource to control the quantum speed limit (QSL) for unitary evolutions. For non-unitary evolutions, QSL depends…
Local, nonlocal quantumness and information theoretic measures
Pankaj Agrawal, Sk Sazim, Indranil Chakrabarty +1
It has been suggested that there may exist quantum correlations that go beyond entanglement. The existence of such correlations can be revealed by quantum discord, but not by the c…