17 papers
One-sided DI-QKD secure against coherent attacks over long distances
Michele Masini, Shubhayan Sarkar
Quantum Key Distribution (QKD) is a technique enabling provable secure communication but faces challenges in device characterization, posing potential security risks. Device-Indepe…
A universal scheme to self-test any quantum state or measurement
Shubhayan Sarkar, Alexandre C. Orthey, Remigiusz Augusiak
The emergence of quantum devices has raised a significant issue: how to certify the quantum properties of a device without placing trust in it. To characterise quantum states and m…
Polytopic Quantum Resource Theories: Geometry and Structures
Moein Naseri, Chirag Srivastava, Chandan Datta +2
Quantum resource theories provide a unifying framework to quantify, compare, and manipulate quantum resources under well-defined operational constraints. Here, we consider any reso…
Witnessing network steerability of every bipartite entangled state without inputs
Shubhayan Sarkar
Quantum steering is an asymmetric form of quantum nonlocality where one can detect whether a measurement on one system can steer or change another distant system. It is well-known…
Predictive supremacy of informationally-restricted quantum perceptron
Shubhayan Sarkar
In the current world, the use of artificial intelligence is penetrating every aspect of human life. The basic element of any artificial intelligence is a digital neuron, called a p…
Almost device-independent certification of GME states with minimal measurements
Shubhayan Sarkar, Alexandre C. Orthey, Gautam Sharma +2
Device-independent certification of quantum states enables the characterization of states within a device under minimal physical assumptions. A major problem in this regard is to c…