41 citations · 119 across the 27 of their papers we have counts for
27 papers
Homomorphic Quantum Error Correction
Kornikar Sen, Miguel A. Martin-Delgado
Homomorphic quantum error correction aims to protect quantum data against both unauthorized access and environmental noise during server-based processing. We investigate the algebr…
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…
Hybrid Reward-Driven Reinforcement Learning for Efficient Quantum Circuit Synthesis
Sara Giordano, Kornikar Sen, Miguel A. Martin-Delgado
A reinforcement learning (RL) framework is introduced for the efficient synthesis of quantum circuits that generate specified target quantum states from a fixed initial state, addr…
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…
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…
Designing a Universal Quantum Switch for Arbitrary Quantum Dynamics
Priya Ghosh, Kornikar Sen, Ujjwal Sen
A quantum switch is a superoperator that, in general, creates a superposition of various causal orders of two or more quantum dynamics that are all divisible in the complete positi…
Positive and non-positive measurements in energy distillation from quantum batteries
Paranjoy Chaki, Aparajita Bhattacharyya, Kornikar Sen +1
We investigate energy distillation from quantum batteries within the framework of generalized quantum measurements, including both positive operator-valued measurements (POVMs) and…
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…
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…
Local entanglement transfer to multiple pairs of spatially separated observers
Tanmoy Mondal, Kornikar Sen, Chirag Srivastava +1
Entanglement is an advantageous but at the same time a costly resource utilized in various quantum tasks. For an efficient usage and deployment of entanglement, we envisage the sce…
Auxiliary-assisted energy distillation from quantum batteries
Paranjoy Chaki, Aparajita Bhattacharyya, Kornikar Sen +1
We discuss the idea of extracting energy from a quantum battery, applying a projective measurement on an auxiliary system. The battery is initially connected to the auxiliary syste…
Noncompletely Positive Quantum Maps Enable Efficient Local Energy Extraction in Batteries
Aparajita Bhattacharyya, Kornikar Sen, Ujjwal Sen
Energy extraction from quantum batteries by means of completely positive trace-preserving (CPTP) maps leads to the concept of CPTP-local passive states, which identify bipartite st…
Effects of noise on performance of Bernstein-Vazirani algorithm
Archi Gupta, Priya Ghosh, Kornikar Sen +1
The Bernstein-Vazirani (BV) algorithm offers exceptional accuracy in finding the hidden bit string of a function. We explore how the algorithm performs in real-world situations whe…
Effects of the detection loophole on rival entanglement attestation techniques
Paranjoy Chaki, Kornikar Sen, Ujjwal Sen
Loopholes present in an experimental set-up can significantly affect the reliability of entanglement detection. We discuss two methods for detection of entanglement: one is by usin…
Noisy quantum batteries
Kornikar Sen, Ujjwal Sen
In realistic situations, physical systems can not be completely isolated from its environment. Its inevitable interaction with the environment can influence the working process of…
To share and not share a singlet: control qubit and nonclassicality in teleportation
Kornikar Sen, Adithi Ajith, Saronath Halder +1
The superposition principle provides us the opportunity to unfold many surprising facts. One such fact leads to the generation of entanglement which may allow one to teleport an un…
Preservation of entanglement in local noisy channels
Priya Ghosh, Kornikar Sen, Ujjwal Sen
Entanglement subject to noise can not be shielded against decaying. But, in case of many noisy channels, the degradation can be partially prevented by using local unitary operation…
Incompatibility of local measurements provide advantage in local quantum state discrimination
Kornikar Sen, Saronath Halder, Ujjwal Sen
The uncertainty principle may be considered as giving rise to the notion of incompatibility of observables. A pack of quantum measurements that cannot be measured simultaneously is…
Closing loopholes of measurement-device-independent nonlinear entanglement witnesses
Kornikar Sen, Chirag Srivastava, Ujjwal Sen
The concept of entanglement witnesses form a useful technique to detect entanglement in realistic quantum devices. Measurement-device-independent nonlinear entanglement witnesses (…
Quantum phase estimation in presence of glassy disorder
Soubhadra Maiti, Kornikar Sen, Ujjwal Sen
We investigate the response to noise, in the form of glassy disorder present in circuit elements, in the success probability of the quantum phase estimation algorithm, a subroutine…
Response to glassy disorder in coin on spread of quantum walker
Priya Ghosh, Kornikar Sen, Ujjwal Sen
We analyze the response to incorporation of glassy disorder in the coin operation of a discrete-time quantum walk in one dimension. We find that the ballistic spread of the disorde…
Quantum coherence with incomplete set of pointers and corresponding wave-particle duality
Ingita Banerjee, Kornikar Sen, Chirag Srivastava +1
Quantum coherence quantifies the amount of superposition in a quantum system, and is the reason and resource behind several phenomena and technologies. It depends on the natural ba…
Measurement-device-independent nonlinear entanglement witnesses
Kornikar Sen, Chirag Srivastava, Ujjwal Sen
Entanglement witnesses are one of the most effective methods to detect entanglement. It is known that nonlinear entanglement witnesses provide better entanglement detection than th…
Noisy quantum input loophole in measurement-device-independent entanglement witnesses
Kornikar Sen, Chirag Srivastava, Shiladitya Mal +2
Entanglement witnesses form an effective method to locally detect entanglement in the laboratory without having the prior knowledge of the full density matrix. However, separable s…