Papers

B. Criger, I. Ashraf·Sep 7, 2017

Fault tolerance is a prerequisite for scalable quantum computing. Architectures based on 2D topological codes are effective for near-term implementations of fault tolerance. To obtain high performance with these architectures, we require a decoder wh...

Kubra Yeter-Aydeniz, G. Siopsis·Sep 7, 2017

We present a quantum algorithm for the calculation of scattering amplitudes of massive charged scalar particles in scalar quantum electrodynamics. Our algorithm is based on continuous-variable quantum computing architecture resulting in expo- nential...

Ignacio H. L'opez Grande, Gabriel Senno, Gonzalo de la Torre +4 more·Sep 7, 2017

In this article we extend results from our previous work [Bendersky et al., Phys. Rev. Lett. 116, 230402 (2016)] by providing a protocol to distinguish in finite time and with arbitrarily high success probability any algorithmic mixture of pure state...

Shenghui Su, Jianhua Zheng, Shuwang Lu·Sep 6, 2017

This paper gives the definitions of an extra superincreasing sequence and an anomalous subset sum, and proposes a fast quantum-safe asymmetric cryptosystem called JUOAN2. The new cryptosystem is based on an additive multivariate permutation problem (...

Joschka Roffe, David Headley, N. Chancellor +2 more·Sep 6, 2017

Coherent parity check (CPC) codes are a new framework for the construction of quantum error correction codes that encode multiple qubits per logical block. CPC codes have a canonical structure involving successive rounds of bit and phase parity check...

A. Paler, A. Fowler, R. Wille·Sep 5, 2017

It is challenging to transform an arbitrary quantum circuit into a form protected by surface code quantum error correcting codes (a variant of topological quantum error correction), especially if the goal is to minimise overhead. One of the issues is...

J. Uhlmann·Sep 5, 2017

Progress in high-performance computing (HPC) fundamentally requires effective thermal dissipation. At present this challenge is viewed in terms of two distinct architectural components: a computational substrate and a heat-exchange substrate. Typical...

F. Song·Sep 5, 2017

This is a note accompanying "CS 410/510: INTRO TO QUANTUM COMPUTING" I taught at Portland State University in Spring 2017. It is a review and summary of some early results related to Grover's quantum search algorithm in a consistent way. I had to go ...

James R. Wootton, D. Loss·Sep 4, 2017

The repetition code is an important primitive for the techniques of quantum error correction. Here we implement repetition codes of at most 15 qubits on the 16 qubit ibmqx3 device. Each experiment is run for a single round of syndrome measurements, a...

Felix Leditzky, Eneet Kaur, N. Datta +1 more·Sep 4, 2017

We study quantum channels that are close to another channel with weakly additive Holevo information and derive upper bounds on their classical capacity. Examples of channels with weakly additive Holevo information are entanglement-breaking channels, ...

L. Magazzù, P. Forn-Díaz, R. Belyansky +6 more·Sep 4, 2017

Quantum two-level systems interacting with the surroundings are ubiquitous in nature. The interaction suppresses quantum coherence and forces the system towards a steady state. Such dissipative processes are captured by the paradigmatic spin-boson mo...

Yves Salath'e, P. Kurpiers, T. Karg +5 more·Sep 4, 2017

Quantum computing architectures rely on classical electronics for control and readout. Employing classical electronics in a feedback loop with the quantum system allows to stabilize states, correct errors and to realize specific feedforward-based qua...

Yu Guo, Daoyi Dong, Chuan-Cun Shu·Sep 3, 2017

Achieving fast and efficient quantum state transfer is a fundamental task in physics, chemistry and quantum information science. However, the successful implementation of the perfect quantum state transfer also requires robustness under practically i...

William M. Kirby, F. Strauch·Sep 1, 2017

We describe an efficient quantum algorithm for the quantum Schur transform. The Schur transform is an operation on a quantum computer that maps the standard computational basis to a basis composed of irreducible representations of the unitary and sym...

J. Morley, N. Chancellor, S. Bose +2 more·Sep 1, 2017

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, co...

A. Beckers, F. Jazaeri, A. Ruffino +3 more·Sep 1, 2017

This paper presents the first experimental investigation and physical discussion of the cryogenic behavior of a commercial 28 nm bulk CMOS technology. Here we extract the fundamental physical parameters of this technology at 300,77 and 4.2 K based on...

A. Pieper, G. Hager, H. Fehske·Aug 31, 2017

We introduce PVSC-DTM (Parallel Vectorized Stencil Code for Dirac and Topological Materials), a library and code generator based on a domain-specific language tailored to implement the specific stencil-like algorithms that can describe Dirac and topo...

Yanlin Chen, Kai-Min Chung, C. Lai·Aug 31, 2017

A lattice is the integer span of some linearly independent vectors. Lattice problems have many significant applications in coding theory and cryptographic systems for their conjectured hardness. The Shortest Vector Problem (SVP), which is to find the...

A. Perdomo-Ortiz, Marcello Benedetti, John Realpe-Gómez +1 more·Aug 31, 2017

With quantum computing technologies nearing the era of commercialization and quantum supremacy, machine learning (ML) appears as one of the promising ‘killer’ applications. Despite significant effort, there has been a disconnect between most quantum ...

A. Perdomo-Ortiz, A. Feldman, A. Ozaeta +9 more·Aug 31, 2017

There have been multiple attempts to demonstrate that quantum annealing and, in particular, quantum annealing on quantum annealing machines, has the potential to outperform current classical optimization algorithms implemented on CMOS technologies. T...