53 citations · 87 across the 20 of their papers we have counts for
22 papers
Trading energy for coherence in mode discrimination
Shuyang Meng, Valerio Scarani
Energy is arguably the main resource in classical physics; coherence is the prototypical quantum resource. In this paper, we study the interplay between these two resources in the…
Experimental certification of multipartite Bell correlations using only few-body symmetric correlations
Jiacheng Sun, Mengyao Hu, Paweł Cieśliński +9
Certifying Bell correlations in increasingly larger multipartite quantum systems is challenging because conventional Bell inequalities rely on many-body correlations, which become…
Tsirelson's nonclassicality witness under dissipative dynamics
Nguyen Vu Khoi Huynh, Nicky Nel Narido Labayna, Martine Schut +1
A dynamics-based test, originally proposed by Tsirelson for the harmonic oscillator, provides a method for certifying quantumness under the assumption of a known Hamiltonian. These…
Cluster-State Witnesses of Finite-Speed Hidden Influences
Weikang Li, Mengyao Hu, Dong-Ling Deng +1
Bell experiments rule out local common-cause explanations of quantum correlations, yet they do not exclude hidden influences that travel faster than light while still having a fini…
Experimental Tabletop Petz recovery of a photonic qubit
Hui Li, Jinyan Chen, Yue Pan +4
The quantum information lost in open evolutions cannot be fully recovered, but partial recovery is possible. The Petz recovery map guarantees almost optimal recovery, notably if th…
Kochen-Specker nonlocal hidden variables must include time-ordering to allow for measurement independence of several agents
Valerio Scarani, Antoine Suarez
We consider an ontology, in which contextual nonlocal hidden variables are stored as pre-existing possibilities in a repository outside space-time; and in which the context can be…
Sub-Bath Cooling in Bosonic Systems: Gaussian Constraints and Non-Gaussian Enhancements
Wen-Han Png, Xueyuan Hu, Valerio Scarani
Cooling quantum systems with finite resources is a central task in quantum technologies and has been extensively explored in discrete-variable settings. As continuous-variable (CV)…
The Petz recovery map for optical losses
Jinyan Chen, Minjeong Song, Jared Jia Xuan Chan +1
Optical systems are a main platform for quantum information processing. A main challenge is information loss due to scattering in unmonitored modes. These losses are modeled as sta…
Exact and approximate conditions of tabletop reversibility: when is Petz recovery cost-free?
Minjeong Song, Hyukjoon Kwon, Valerio Scarani
Channels that describe open quantum dynamics are inherently irreversible: it is impossible to undo their effect completely, but one can study partial recovery of the…
Thermalization of finite complexity and its application to heat bath algorithmic cooling
Xueyuan Hu, Valerio Scarani
We introduce a class of thermal operations based on the collision model, where the system sequentially interacts with uncorrelated bath molecules via energy-preserving unitaries. T…
Petz recovery maps of single-qubit decoherence channels in an ion trap quantum processor
Wen-Han Png, Valerio Scarani
The Petz recovery map provides a near-optimal reversal of quantum noise, yet proposals for its implementation are only recent. We propose a physical realization of the exact state-…
A quantum entropy production operator
Ge Bai, Francesco Buscemi, Valerio Scarani
We introduce a fully quantum notion of entropy production based on the non-commutative extension of the classical log-ratio between forward and reverse processes. Given a pair of q…
All three-angle variants of Tsirelson's precession protocol, and improved bounds for wedge integrals of Wigner functions
Lin Htoo Zaw, Valerio Scarani
Tsirelson's precession protocol is a nonclassicality witness that can be defined for both discrete and continuous variable systems. Its original version involves measuring a preces…
Certifying the quantumness of a nuclear spin qudit through its uniform precession
Arjen Vaartjes, Martin Nurizzo, Lin Htoo Zaw +16
Spin precession is a textbook example of dynamics of a quantum system that exactly mimics its classical counterpart. Here we challenge this view by certifying the quantumness of ex…
Quantum Bayes' rule and Petz transpose map from the minimum change principle
Ge Bai, Francesco Buscemi, Valerio Scarani
Bayes' rule, which is routinely used to update beliefs based on new evidence, can be derived from a principle of minimum change. This principle states that updated beliefs must be…
Emergence of Fluctuation Relations in UNO
Peter Sidajaya, Jovan Hsuen Khai Low, Clive Cenxin Aw +1
In the last two decades, fluctuation theorems have been proved formally and demonstrated experimentally for several variables (such as entropy production, work, or flux) and differ…
Even-parity precession protocol for detecting nonclassicality and entanglement
Jinyan Chen, Jackson Tiong, Lin Htoo Zaw +1
We introduce an even-parity precession protocol that can detect the nonclassicality of some quantum states using only measurements of a uniformly-precessing variable at different p…
Beating one bit of communication with quantum correlations in smaller dimensions
Peter Sidajaya, Valerio Scarani
As a consequence of Bell's theorem, the statistics of measurements on some entangled states cannot be simulated with local hidden variables alone. The amount of communication that…
Tsirelson's Inequality for the Precession Protocol is Maximally Violated by Quantum Theory
Lin Htoo Zaw, Mirjam Weilenmann, Valerio Scarani
The precession protocol involves measuring , the probability that a uniformly precessing observable (like the position of a harmonic oscillator or a coordinate undergoing spat…
Certification of genuine multipartite entanglement in spin ensembles with measurements of total angular momentum
Khoi-Nguyen Huynh-Vu, Lin Htoo Zaw, Valerio Scarani
We introduce entanglement witnesses for spin ensembles which detect genuine multipartite entanglement using only measurements of the total angular momentum. States that are missed…
A Witness of GHZ Entanglement Using Only Collective Spin Measurements
Lin Htoo Zaw, Khoi-Nguyen Huynh-Vu, Valerio Scarani
Of existing entanglement witnesses that utilize only collective measurements of a spin ensemble, not all can detect genuine multipartite entanglement (GME), and none can detect Gre…
Cross time-bin photonic entanglement for quantum key distribution
A. Martin, F. Kaiser, A. Vernier +3
We report a fully fibered source emitting cross time-bin entangled photons at 1540 nm from type-II spontaneous parametric down conversion. Compared to standard time-bin entanglemen…