Papers

C. Figgatt, Aaron Ostrander, N. Linke +4 more·Oct 29, 2018

The circuit model of a quantum computer consists of sequences of gate operations between quantum bits (qubits), drawn from a universal family of discrete operations1. The ability to execute parallel entangling quantum gates offers efficiency gains in...

M. Berta, Francesco Borderi, Omar Fawzi +1 more·Oct 29, 2018

We give asymptotically converging semidefinite programming hierarchies of outer bounds on bilinear programs of the form Tr[H(D⊗E)]\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usep...

Shibei Xue, Jun Zhang, I. Petersen·Oct 29, 2018

Correlations of an environment are crucial for the dynamics of non-Markovian quantum systems, which may not be known in advance. In this brief, we propose a gradient algorithm for identifying the correlations in terms of the time-varying damping rate...

A. Bolt, D. Poulin, T. Stace·Oct 27, 2018

Foliated quantum codes are a resource for fault-tolerant measurement-based quantum error correction for quantum repeaters and for quantum computation. They represent a general approach to integrating a range of possible quantum error correcting codes...

S. Matsuura, T. Yamazaki, Valentin Senicourt +2 more·Oct 26, 2018

The accelerated progress in manufacturing noisy, intermediate-scale quantum (NISQ) computing hardware has opened the possibility of exploring its application in transforming approaches to solving computationally challenging problems. The important li...

Kai-Min Chung, Han-Hsuan Lin·Oct 25, 2018

We generalize the PAC (probably approximately correct) learning model to the quantum world by generalizing the concepts from classical functions to quantum processes, defining the problem of \emph{PAC learning quantum process}, and study its sample c...

Chao-Hua Yu, F. Gao, Song Lin +1 more·Oct 25, 2018

Data compression can be achieved by reducing the dimensionality of high-dimensional but approximately low-rank datasets, which may in fact be described by the variation of a much smaller number of parameters. It often serves as a preprocessing step t...

Mingyu Sun, M. Geller·Oct 24, 2018

State preparation and measurement (SPAM) errors limit the performance of many gate-based quantum computing architecures, but are partly correctable after a calibration step that requires, for an exact implementation on a register of $n$ qubits, $2^n$...

C. Godfrin, R. Ballou, E. Bonet +4 more·Oct 24, 2018

Qudits, with their state space of dimension d > 2, open fascinating experimental prospects. The quantum properties of their states provide new potentialities for quantum information, quantum contextuality, expressions of geometric phases, facets of q...

Sukin Sim, Yudong Cao, J. Romero +2 more·Oct 24, 2018

In recent years, the field of quantum computing has significantly developed in both the improvement of hardware as well as the assembly of various software tools and platforms, including cloud access to quantum devices. Unfortunately, many of these r...

Christian Pehle, K. Meier, M. Oberthaler +1 more·Oct 24, 2018

We demonstrate, that artificial neural networks (ANN) can be trained to emulate single or multiple basic quantum operations. In order to realize a quantum state, we implement a novel "quantumness gate" that maps an arbitrary matrix to the real repres...

Ryan Larose, Arkin Tikku, É. O’Neel-Judy +2 more·Oct 24, 2018

Variational hybrid quantum-classical algorithms are promising candidates for near-term implementation on quantum computers. In these algorithms, a quantum computer evaluates the cost of a gate sequence (with speedup over classical cost evaluation), a...

A. Vrajitoarea, Ziwen Huang, Peter Groszkowski +2 more·Oct 23, 2018

Superconducting circuits extensively rely on the Josephson junction as a nonlinear electronic element for manipulating quantum information and mediating photon interactions. Despite continuing efforts in pushing the coherence of Josephson circuits, t...

V. Macrì, F. Nori, A. F. Kockum·Oct 23, 2018

The ability to entangle quantum systems is crucial for many applications in quantum technology, including quantum communication and quantum computing. Here, we propose a simple and versatile setup for deterministically creating Bell and Greenberger-H...

D. Lennon, H. Moon, L. Camenzind +6 more·Oct 23, 2018

Scalable quantum technologies such as quantum computers will require very large numbers of quantum devices to be characterised and tuned. As the number of devices on chip increases, this task becomes ever more time-consuming, and will be intractable ...

Brad Lackey·Oct 23, 2018

This note provides a detailed description and derivation of the domain decomposition algorithm that appears in previous works by the author. Given a large re-estimation problem, domain decomposition provides an iterative method for assembling Boltzma...

Christophe Vuillot, L. Lao, B. Criger +3 more·Oct 23, 2018

The large-scale execution of quantum algorithms requires basic quantum operations to be implemented fault-tolerantly. The most popular technique for accomplishing this, using the devices that can be realized in the near term, uses stabilizer codes wh...

Naomi H. Nickerson, H'ector Bomb'in·Oct 23, 2018

In order to build a scalable quantum computer error correction will be required to reduce the impact of errors. Implementing error correction in the framework of measurement based computation manifests itself as the construction of fault tolerant clu...

D. Pastorello, E. Blanzieri·Oct 22, 2018

In this paper, we present a novel strategy to solve optimization problems within a hybrid quantum-classical scheme based on quantum annealing, with a particular focus on QUBO problems. The proposed algorithm implements an iterative structure where th...

H. Bombin·Oct 22, 2018

I present a fault-tolerant quantum computing method for 2D architectures that is particularly appealing for photonic qubits. It relies on a crossover of techniques from topological stabilizer codes and measurement based quantum computation. In partic...