89 citations · 541 across the 28 of their papers we have counts for
28 papers
Modular non-Hermitian topology and its application to critical sensing
Saubhik Sarkar, Chiranjib Mukhopadhyay, Abolfazl Bayat
Non-Hermitian topological systems have attracted a lot of research activities in recent times, both theoretically and experimentally, due to their unique physical properties and as…
Quantum error correction for multiparameter metrology
Mauricio Gutiérrez, Chiranjib Mukhopadhyay, Victor Montenegro +1
For single-parameter sensing, Greenberger-Horne-Zeilinger (GHZ) probes achieve optimal quantum-enhanced precision across the unknown parameter range, solely relying on parameter-in…
Quantum reservoir computing for predicting and characterizing chaotic maps
Qingyu Li, Chiranjib Mukhopadhyay, Ludovico Minati +1
Quantum reservoir computing has emerged as a promising paradigm for harnessing quantum systems to process temporal data efficiently by bypassing the costly training of gradient-bas…
Beating joint quantum estimation limits with stepwise multiparameter metrology
Chiranjib Mukhopadhyay, Abolfazl Bayat, Victor Montenegro +1
Conventional multiparameter quantum sensing relies on joint estimation, but this approach faces two key limitations: theoretical bounds may be unattainable due to measurement incom…
Quantum Reservoir Computing for Realized Volatility Forecasting
Qingyu Li, Chiranjib Mukhopadhyay, Abolfazl Bayat +1
Recent advances in quantum computing have demonstrated its potential to significantly enhance the analysis and forecasting of complex classical data. Among these, quantum reservoir…
Current Trends in Global Quantum Metrology
Chiranjib Mukhopadhyay, Victor Montenegro, Abolfazl Bayat
Quantum sensors are now universally acknowledged as one of the most promising near-term quantum technologies. The traditional formulation of quantum sensing introduces a concrete b…
Saturable global quantum sensing
Chiranjib Mukhopadhyay, Matteo G. A. Paris, Abolfazl Bayat
Conventional formulation of quantum sensing has been mostly developed in the context of local estimation, where the unknown parameter is roughly known. In contrast, global sensing,…
Review: Quantum Metrology and Sensing with Many-Body Systems
Victor Montenegro, Chiranjib Mukhopadhyay, Rozhin Yousefjani +4
The main power of quantum sensors is achieved when the probe is composed of several particles. In this situation, quantum features such as entanglement contribute to enhancing the…
Modular Many-Body Quantum Sensors
Chiranjib Mukhopadhyay, Abolfazl Bayat
Quantum many-body systems undergoing phase transitions have been proposed as probes enabling beyond-classical enhancement of sensing precision. However, this enhancement is usually…
Fermionic Simulators for Enhanced Scalability of Variational Quantum Simulation
Qingyu Li, Chiranjib Mukhopadhyay, Abolfazl Bayat
Near-term quantum simulators are mostly based on qubit-based architectures. However, their imperfect nature significantly limits their practical application. The situation is even…
Free-Fermionic Topological Quantum Sensors
Saubhik Sarkar, Chiranjib Mukhopadhyay, Abhijeet Alase +1
Second order quantum phase transitions, with well-known features such as long-range entanglement, symmetry breaking, and gap closing, exhibit quantum enhancement for sensing at cri…
Characterization of an operational quantum resource in a critical many-body system
Saubhik Sarkar, Chiranjib Mukhopadhyay, Abolfazl Bayat
Quantum many-body systems have been extensively studied from the perspective of quantum technology, and conversely, critical phenomena in such systems have been characterized by op…
Coherence of Purification
Arun Kumar Pati, Long-Mei Yang, Chiranjib Mukhopadhyay +2
We introduce a quantity called the coherence of purification which can be a measure of total quantumness for a single system. We prove that coherence of purification is always more…
Superposition of causal order enables perfect quantum teleportation with very noisy singlets
Chiranjib Mukhopadhyay, Arun Kumar Pati
We show that the fidelity of the standard quantum teleportation protocol, which utilizes an impure resource state, applied successively, can be significantly improved, when used in…
Quantum precision thermometry with weak measurement
Arun Kumar Pati, Chiranjib Mukhopadhyay, Sagnik Chakraborty +1
As the minituarization of electronic devices, which are sensitive to temperature, grows apace, sensing of temperature with ever smaller probes is more important than ever. Genuinel…
Superposition of causal order as a metrological resource for quantum thermometry
Chiranjib Mukhopadhyay, Manish K. Gupta, Arun Kumar Pati
We propose a novel approach to qubit thermometry using a quantum switch, that introduces an indefinite causal order in the probe-bath interaction, to significantly enhance the ther…
Stronger classes of sum uncertainty and reverse uncertainy relations
Chiranjib Mukhopadhyay, Arun Kumar Pati
Uncertainty relations are old, yet potentially rewarding to explore. By introducing a quantity called the uncertainty matrix, we provide a link between purity and observable incomp…
Generating steady quantum coherence and magic through an autonomous thermodynamic machine by utilizing a spin bath
Chiranjib Mukhopadhyay
Generation of steady quantumness in the presence of an environment is of utmost importance if we are to build practical quantum devices. We propose a scheme of generating steady co…
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…
Quantum speed limit constraints on a nanoscale autonomous refrigerator
Chiranjib Mukhopadhyay, Avijit Misra, Samyadeb Bhattacharya +1
Quantum speed limit, furnishing a lower bound on the required time for the evolution of a quantum system through the state space, imposes an ultimate natural limitation to the dyna…
A note on robustness of coherence for multipartite quantum states
Chiranjib Mukhopadhyay, Udit Kamal Sharma, Indranil Chakrabarty
In this brief report, we prove that robustness of coherence (ROC), in contrast to many popular quantitative measures of quantum coherence derived from the resource theoretic framew…
Wave-particle duality employing quantum coherence in superposition with non-orthogonal pointers
Sreetama Das, Chiranjib Mukhopadhyay, Sudipto Singha Roy +3
We propose the notion of quantum coherence for superpositions over states which are not necessarily mutually orthogonal. This anticipatedly leads to a resource theory of non-orthog…