Witnessing the nonclassical nature of gravity in the presence of unknown interactions

H Chevalier, AJ Paige, MS Kim - Physical Review A, 2020 - APS
General relativity is a classical field theory and therefore does not predict gravitationally
induced entanglement. As such, recent proposals have focused on seeking an empirical …

Practical and reliable error bars in quantum tomography

P Faist, R Renner - Physical review letters, 2016 - APS
Precise characterization of quantum devices is usually achieved with quantum tomography.
However, most methods which are currently widely used in experiments, such as maximum …

Experimental few-copy multipartite entanglement detection

V Saggio, A Dimić, C Greganti, LA Rozema, P Walther… - Nature physics, 2019 - nature.com
Many future quantum technologies rely on the generation of entangled states. Quantum
devices will require verification of their operation below some error threshold, but the …

Single-copy entanglement detection

A Dimić, B Dakić - npj Quantum Information, 2018 - nature.com
One of the main challenges of quantum information is the reliable verification of quantum
entanglement. The conventional detection schemes require repeated measurement on a …

Monte Carlo sampling from the quantum state space. I

J Shang, YL Seah, HK Ng, DJ Nott… - New Journal of …, 2015 - iopscience.iop.org
High-quality random samples of quantum states are needed for a variety of tasks in quantum
information and quantum computation. Searching the high-dimensional quantum state …

Entanglement witnesses for indistinguishable particles

A Reusch, J Sperling, W Vogel - Physical Review A, 2015 - APS
We study the problem of witnessing entanglement among indistinguishable particles. For
this purpose, we derive a set of equations which results in necessary and sufficient …

High posterior density ellipsoids of quantum states

C Ferrie - New Journal of Physics, 2014 - iopscience.iop.org
Regions of quantum states generalize the classical notion of error bars. High posterior
density (HPD) credible regions are the most powerful of region estimators. However, they …

Quantum model averaging

C Ferrie - New Journal of Physics, 2014 - iopscience.iop.org
Standard tomographic analyses ignore model uncertainty. It is assumed that a given model
generated the data and the task is to estimate the quantum state, or a subset of parameters …

Entanglement verification in quantum networks with tampered nodes

M Amoretti, S Carretta - IEEE Journal on Selected Areas in …, 2020 - ieeexplore.ieee.org
In this paper, we consider the problem of entanglement verification across the quantum
memories of any two nodes of a quantum network. Its solution can be a means for detecting …

Detection of nonlocal superpositions

AJ Gutiérrez-Esparza, WM Pimenta, B Marques… - Physical Review A, 2014 - APS
We study in theory and experiment the verification of the Schmidt number of quantum
correlated radiation fields. This measure of entanglement counts the number of global …