608 citations · 1.4k across the 26 of their papers we have counts for
26 papers
Criticality-Enhanced Precision in Phase Thermometry
Mei Yu, H. Chau Nguyen, Stefan Nimmrichter
Temperature estimation of interacting quantum many-body systems is both a challenging task and topic of interest in quantum metrology, given that critical behavior at phase transit…
Randomness Certification from Multipartite Quantum Steering for Arbitrary Dimensional Systems
Yi Li, Yu Xiang, Xiao-Dong Yu +3
Entanglement in bipartite systems has been applied for the generation of secure random numbers, which are playing an important role in cryptography or scientific numerical simulati…
Quantum Error Mitigated Classical Shadows
Hamza Jnane, Jonathan Steinberg, Zhenyu Cai +2
Classical shadows enable us to learn many properties of a quantum state with very few measurements. However, near-term and early fault-tolerant quantum computers will only be a…
Certifying the activation of Bell nonlocality with finite data
Jonathan Steinberg, H. Chau Nguyen, Matthias Kleinmann
The activation of Bell nonlocality is a protocol that enables the violation of a Bell inequality from a system that initially did not allow for any such violation because the state…
Optimising shadow tomography with generalised measurements
H. Chau Nguyen, Jan Lennart Bönsel, Jonathan Steinberg +1
Advances in quantum technology require scalable techniques to efficiently extract information from a quantum system, such as expectation values of observables or its entropy. Tradi…
No-go theorem based on incomplete information of Wigner about his friend
Zhen-Peng Xu, Jonathan Steinberg, H. Chau Nguyen +1
The notion of measurements is central for many debates in quantum mechanics. One critical point is whether a measurement can be regarded as an absolute event, giving the same resul…
Minimal scheme for certifying three-outcome qubit measurements in the prepare-and-measure scenario
Jonathan Steinberg, H. Chau Nguyen, Matthias Kleinmann
The number of outcomes is a defining property of a quantum measurement, in particular, if the measurement cannot be decomposed into simpler measurements with fewer outcomes. Import…
Quantum-Inspired Hierarchy for Rank-Constrained Optimization
Xiao-Dong Yu, Timo Simnacher, H. Chau Nguyen +1
Many problems in information theory can be reduced to optimizations over matrices, where the rank of the matrices is constrained. We establish a link between rank-constrained optim…
Reliable experimental certification of one-way Einstein-Podolsky-Rosen steering
Qiang Zeng, Jiangwei Shang, H. Chau Nguyen +1
Quantum steering is a recently-defined form of quantum correlation which lies at the heart of quantum mechanics. In difference from other types of quantum correlations, quantum ste…
A complete hierarchy for the pure state marginal problem in quantum mechanics
Xiao-Dong Yu, Timo Simnacher, Nikolai Wyderka +2
Clarifying the relation between the whole and its parts is crucial for many problems in science. In quantum mechanics, this question manifests itself in the quantum marginal proble…
Symmetries between measurements in quantum mechanics
H. Chau Nguyen, Sébastien Designolle, Mohamed Barakat +1
Symmetries are a key concept to connect mathematical elegance with physical insight. We consider measurement assemblages in quantum mechanics and show how their symmetry can be des…
Quaternionic quantum theory admits universal dynamics only for two-level systems
Jonathan Steinberg, H. Chau Nguyen, Matthias Kleinmann
We revisit the formulation of quantum mechanics over the quaternions and investigate the dynamical structure within this framework. Similar to standard complex quantum mechanics, t…
Some quantum measurements with three outcomes can reveal nonclassicality where all two-outcome measurements fail to do so
H. Chau Nguyen, Otfried Gühne
Measurements serve as the intermediate communication layer between the quantum world and our classical perception. So, the question which measurements efficiently extract informati…
Quantum steering of Bell-diagonal states with generalized measurements
H. Chau Nguyen, Otfried Gühne
The phenomenon of quantum steering in bipartite quantum systems can be reduced to the question whether or not the first party can perform measurements such that the conditional sta…
Entanglement dynamics of two mesoscopic objects with gravitational interaction
H. Chau Nguyen, Fabian Bernards
We analyse the entanglement dynamics of the two particles interacting through gravity in the recently proposed experiments aiming at testing quantum signatures for gravity [Phy. Re…
Quantum Steering
Roope Uola, Ana C. S. Costa, H. Chau Nguyen +1
Quantum correlations between two parties are essential for the argument of Einstein, Podolsky, and Rosen in favour of the incompleteness of quantum mechanics. Schrödinger noted tha…
Generalized Nested Summation of Powers of Natural Numbers
Patibandla Chanakya, Putla Harsha
In this paper, we provide a general framework for obtaining the formula for nested summation of powers of natural numbers. We define a special triangular array of numbers from whic…
Conclusive experimental demonstration of one-way Einstein-Podolsky-Rosen steering
Nora Tischler, Farzad Ghafari, Travis J. Baker +10
Einstein-Podolsky-Rosen steering is a quantum phenomenon wherein one party influences, or steers, the state of a distant party's particle beyond what could be achieved with a separ…
Quantum steering with positive operator valued measures
H. Chau Nguyen, Antony Milne, Thanh Vu +1
We address the problem of quantum nonlocality with positive operator valued measures (POVM) in the context of Einstein-Podolsky-Rosen quantum steering. We show that, given a candid…
On the density of states of circular graphene quantum dots
H. Chau Nguyen, Nhung T. T. Nguyen, V. Lien Nguyen
We suggest a simple approach to calculate the local density of states that effectively applies to any structure created by an axially symmetric potential on a continuous graphene s…
Inverse statistical problems: from the inverse Ising problem to data science
H. Chau Nguyen, Riccardo Zecchina, Johannes Berg
Inverse problems in statistical physics are motivated by the challenges of `big data' in different fields, in particular high-throughput experiments in biology. In inverse problems…
On the pure state outcomes of Einstein-Podolsky-Rosen steering
H. Chau Nguyen, Kimmo Luoma
In the Einstein--Podolsky--Rosen experiment, when Alice makes a measurement on her part of a bipartite system, Bob's part is collapsed to, or steered to, a specific ensemble. Moreo…
Necessary and sufficient condition for steerability of two-qubit states by the geometry of steering outcomes
H. Chau Nguyen, Thanh Vu
Fully characterizing the steerability of a quantum state of a bipartite system has remained an open problem since the concept of steerability was defined. In this work, using our r…
Non-separability and steerability of two-qubit states from the geometry of steering outcomes
H. Chau Nguyen, Thanh Vu
When two qubits A and B are in an appropriate state, Alice can remotely steer Bob's system B into different ensembles by making different measurements on A. This famous phenomenon…