Papers

D. Amaro, Markus P. Müller·Nov 4, 2019

Entanglement is a central concept in quantum information and a key resource for many quantum protocols. In this work we propose and analyze a class of entanglement witnesses that detect the presence of entanglement in subsystems of experimental multi...

Iordanis Kerenidis, Jonas Landman, A. Prakash·Nov 4, 2019

Quantum computing is a new computational paradigm that promises applications in several fields, including machine learning. In the last decade, deep learning, and in particular Convolutional neural networks (CNN), have become essential for applicatio...

Siyi Yang, M. Sarihan, Kai-Chi Chang +2 more·Nov 1, 2019

Graph based codes such as low density parity check (LDPC) codes have been shown promising for the information reconciliation phase in quantum key distribution (QKD). However, existing graph coding schemes have not fully utilized the properties of the...

M. Steudtner, S. Wehner·Nov 1, 2019

Qubitization is a modern approach to estimate Hamiltonian eigenvalues without simulating its time evolution. While in this way approximation errors are avoided, its resource and gate requirements are more extensive: qubitization requires additional q...

M. Bañuls, R. Blatt, J. Catani +17 more·Oct 31, 2019

Lattice gauge theories, which originated from particle physics in the context of Quantum Chromodynamics (QCD), provide an important intellectual stimulus to further develop quantum information technologies. While one long-term goal is the reliable qu...

F. Carollo, C. Pérez-Espigares·Oct 30, 2019

Controlling dynamical fluctuations in open quantum systems is essential both for our comprehension of quantum nonequilibrium behavior and for its possible application in near-term quantum technologies. However, understanding these fluctuations is ext...

Zahra Raissi, Adam Teixidó, C. Gogolin +1 more·Oct 28, 2019

Pure multipartite quantum states of n parties and local dimension q are called k-uniform if all reductions to k parties are maximally mixed. These states are relevant for our understanding of multipartite entanglement, quantum information protocols a...

Z. Kudyshev, A. Kildishev, V. Shalaev +1 more·Oct 28, 2019

With the emergence of new photonic and plasmonic materials with optimized properties as well as advanced nanofabrication techniques, nanophotonic devices are now capable of providing solutions to global challenges in energy conversion, information te...

Zhengwei Liu·Oct 26, 2019

Graph theory is important in information theory. We introduce a quantization process on graphs and apply the quantized graphs in quantum information. The quon language provides a mathematical theory to study such quantized graphs in a general framewo...

J. Yoneda, K. Takeda, A. Noiri +5 more·Oct 25, 2019

Single electron spins confined in silicon quantum dots hold great promise as a quantum computing architecture with demonstrations of long coherence times, high-fidelity quantum logic gates, basic quantum algorithms and device scalability. While singl...

Ben Bartlett, S. Fan·Oct 23, 2019

We present a photonic integrated circuit architecture for a quantum programmable gate array (QPGA) capable of preparing arbitrary quantum states and operators. The architecture consists of a lattice of phase-modulated Mach-Zehnder interferometers, wh...

Jianwei Wang, F. Sciarrino, A. Laing +1 more·Oct 21, 2019

Quantum technologies comprise an emerging class of devices capable of controlling superposition and entanglement of quantum states of light or matter, to realize fundamental performance advantages over ordinary classical machines. The technology of i...

G. Amosov, A. S. Mokeev, A. N. Pechen·Oct 20, 2019

An important topic in quantum information is the theory of error correction codes. Practical situations often involve quantum systems with states in an infinite-dimensional Hilbert space, for example, coherent states. Motivated by these practical nee...

Kory Becker·Oct 18, 2019

What is it like to create a game for a quantum computer? With its ability to perform calculations and processing in a distinctly different way than classical computers, quantum computing has the potential for becoming the next revolution in informati...

Yu Shen, Guin-Dar Lin·Oct 18, 2019

As it has been demonstrated that trapped ion systems have unmatched long-lived quantum-bit (qubit) coherence and can support high-fidelity quantum manipulations, how to scale up the system size becomes an inevitable task for practical purposes. In th...

S. E. Rasmussen, K. Groenland, R. Gerritsma +2 more·Oct 17, 2019

The family of $n$-bit Toffoli gates, with the two-bit Toffoli gate as the figurehead, are of great interest in quantum information as they can be used as universal gates and in quantum error correction, among other things. We present a single-step im...

P. Mazurek, M. Farkas, A. Grudka +2 more·Oct 16, 2019

For every stabiliser $N$-qudit absolutely maximally entangled state, we present a method for determining the stabiliser generators and logical operators of a corresponding quantum error correction code. These codes encode $k$ qudits into $N-k$ qudits...

A. Wallucks, I. Marinković, B. Hensen +2 more·Oct 16, 2019

Nanofabricated mechanical resonators are gaining significant momentum among potential quantum technologies due to their unique design freedom and independence from naturally occurring resonances. As their functionality is widely detached from materia...

W. Wen·Oct 14, 2019

We regard the Parikh-Wilczek's tunnelling model of Hawking radiation as a quantum mechanical process of stimulated emission. The hypothesized microstates are found at the horizon with double degeneracy. A Jaynes-Cummings toy model for a black hole in...

Xiaoqin Gao, Manuel Erhard, A. Zeilinger +1 more·Oct 13, 2019

An open question in quantum optics is how to manipulate and control complex quantum states in an experimentally feasible way. Here we present concepts for transformations of high-dimensional multiphotonic quantum systems. The proposals rely on two ne...