11 citations · 29 across the 10 of their papers we have counts for
10 papers
Quantum Nonlocality and Device-Independent Randomness Robust to Relaxations of Bell Assumptions
Ravishankar Ramanathan, Yuan Liu
The question of certifying quantum nonlocality under a relaxation of the assumptions in the Bell theorem has gained traction, with potential for device-independent applications und…
No Bound Randomness in Quantum Nonlocality
Ravishankar Ramanathan, Yuan Liu, Yutian Wu +1
Recently it has been found that there exist maximally nonlocal quantum correlations that fail to certify randomness for any fixed input pair, rendering them useless for device-inde…
Accumulation of Device-Independent Quantum Randomness against Time-Ordered No-Signalling Adversaries
Ravishankar Ramanathan, Yuan Liu, Yutian Wu
The question of security of practical device-independent protocols against no-signalling adversaries, the ultimate form of cryptographic security, has remained open. A key ingredie…
Optimal and Feasible Contextuality-based Randomness Generation
Yuan Liu, Ravishankar Ramanathan
Semi-device-independent (SDI) randomness generation protocols based on Kochen-Specker contextuality offer the attractive features of compact devices, high rates, and ease of experi…
When Quantum Nonlocality Does Not Play Dice
Ravishankar Ramanathan, Yuan Liu, Stefano Pironio
Bell nonlocality is widely viewed as a signature of intrinsic randomness, effectively playing the role of a 'dice' at the heart of many device-independent cryptographic protocols.…
Equivalence between face nonsignaling correlations, full nonlocality, all-versus-nothing proofs, and pseudotelepathy
Yuan Liu, Ho Yiu Chung, Emmanuel Zambrini Cruzeiro +3
We show that a quantum correlation is in a face of the nonsignaling polytope with no local points if and only if has nonlocal content 1, if and only if allows for a Gre…
(Almost-)Quantum Bell Inequalities and Device-Independent Applications
Yuan Liu, Ho Yiu Chung, Ravishankar Ramanathan
Investigations of the boundary of the quantum correlation set through the derivation of quantum Bell inequalities have gained increased attention in recent years, which are related…
Optimal Measurement Structures for Contextuality Applications
Yuan Liu, Ravishankar Ramanathan, Karol Horodecki +2
The Kochen-Specker (KS) theorem is a corner-stone result in the foundations of quantum mechanics describing the fundamental difference between quantum theory and classical non-cont…
Tilted Hardy paradoxes for device-independent randomness extraction
Shuai Zhao, Ravishankar Ramanathan, Yuan Liu +1
The device-independent paradigm has had spectacular successes in randomness generation, key distribution and self-testing, however most of these results have been obtained under th…
Large violations in Kochen Specker contextuality and their applications
Ravishankar Ramanathan, Yuan Liu, Paweł Horodecki
The Kochen-Specker (KS) theorem is a fundamental result in quantum foundations that has spawned massive interest since its inception. We present state-independent non-contextuality…