Statistical inference for subdiffusion processes is a growing topic of research spurred on by the
advent single particle tracking technologies which allow for direct observation of the trajectories
of many particles at a time. Often statistical inference is performed using methods derived from the
non-ergodicity properties of subdiffusion processes. However, these estimators require in-principle
continuous sampling of many long trajectories which is not implementable without introducing some

Quantum discord measures quantum correlation by comparing the quantum mutual information with the
maximal amount of mutual information accessible to a quantum measurement. This paper analyzes the
properties of diagonal discord, a simplified version of discord that compares quantum mutual
information with the mutual information revealed by a measurement that correspond to the eigenstates
of the local density matrices. In contrast to the optimized discord, diagonal discord is easily

Author(s): Yu Guo
Entanglement monotone is defined as a convex measure of entanglement that does not increase on average under local operations and classical communication (LOCC). Here we call an entanglement monotone a strict entanglement monotone (SEM) if it decreases strictly on average under LOCC. We show that, f...
[Phys. Rev. A 99, 022338] Published Thu Feb 28, 2019

Author(s): James G. Morley, Nicholas Chancellor, Sougato Bose, and Viv Kendon
Computing using a continuous-time evolution, based on the natural interaction Hamiltonian of the quantum computer hardware, is a promising route to building useful quantum computers in the near term. Adiabatic quantum computing, quantum annealing, computation by a continuous-time quantum walk, and s...
[Phys. Rev. A 99, 022339] Published Thu Feb 28, 2019

Author(s): Zhengjun Xi and Shanshan Yuwen
We introduce a measure of coherence which is extended from the coherence rank via the standard convex roof construction; we call it the logarithmic coherence number. This approach is parallel to the Schmidt measure in entanglement theory. We study some interesting properties of the logarithmic coher...
[Phys. Rev. A 99, 022340] Published Thu Feb 28, 2019

Author(s): Timjan Kalajdzievski and Juan Miguel Arrazola
We propose a method for decomposing continuous-variable operations into a universal gate set, without the use of any approximations. We fully characterize a set of transformations admitting exact decompositions and describe a process for obtaining them systematically. Gates admitting these decomposi...
[Phys. Rev. A 99, 022341] Published Thu Feb 28, 2019

Author(s): Francesco Arzani, Alessandro Ferraro, and Valentina Parigi
We introduce a high-dimensional quantum encoding based on coherent mode-dependent single-photon subtraction from multimode squeezed states. This encoding can be seen as a generalization to the case of nonzero squeezing of the standard single-photon multirail encoding. The advantage is that the prese...
[Phys. Rev. A 99, 022342] Published Thu Feb 28, 2019

Author(s): Aleksander M. Kubicki, Carlos Palazuelos, and David Pérez-García
The no-programing theorem prohibits the existence of a universal programmable quantum processor. This statement has several implications in relation to quantum computation but also to other tasks of quantum information processing, making this construction a central notion in this context. Nonetheles...
[Phys. Rev. Lett. 122, 080505] Published Thu Feb 28, 2019

Author(s): Dian Wu, Lei Wang, and Pan Zhang
Deep neural networks can effectively sample from the Boltzmann distribution and compute the variational free energy as well as physical observables better than existing mean-field methods.
[Phys. Rev. Lett. 122, 080602] Published Thu Feb 28, 2019