Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Template-Assisted Scalable Nanowire Networks.
M. Friedl, Kris Cerveny, P. Weigele +15 more·Mar 1, 2018
Topological qubits based on Majorana Fermions have the potential to revolutionize the emerging field of quantum computing by making information processing significantly more robust to decoherence. Nanowires are a promising medium for hosting these ki...
Quantum Walk in Momentum Space with a Bose-Einstein Condensate.
S. Dadras, Alexander Gresch, C. Groiseau +2 more·Feb 22, 2018
We present a discrete-time, one-dimensional quantum walk based on the entanglement between the momentum of ultracold rubidium atoms (the walk space) and two internal atomic states (the "coin" degree of freedom). Our scheme is highly flexible and can ...
Introduction to topological quantum computation with non-Abelian anyons
Bernard Field, T. Simula·Feb 17, 2018
Topological quantum computers promise a fault tolerant means to perform quantum computation. Topological quantum computers use particles with exotic exchange statistics called non-Abelian anyons, and the simplest anyon model which allows for universa...
Twins Percolation for Qubit Losses in Topological Color Codes.
D. Vodola, D. Amaro, M. Martin-Delgado +1 more·Feb 13, 2018
In this Letter, we establish and explore a new connection between quantum information theory and classical statistical mechanics by studying the problem of qubit losses in 2D topological color codes. We introduce a protocol to cope with qubit losses,...
Synthetic spin–orbit coupling and topological polaritons in Janeys–Cummings lattices
F. Gu, Jia Liu, F. Mei +3 more·Jan 25, 2018
The interaction between a photon and a qubit in the Janeys–Cummings (JC) model generates a kind of quasiparticle called polariton. While they are widely used in quantum optics, difficulties in engineering-controllable coupling of them severely limit ...
Transversality and lattice surgery: Exploring realistic routes toward coupled logical qubits with trapped-ion quantum processors
Mauricio Gutiérrez, Mauricio Gutiérrez, Markus Müller +3 more·Jan 22, 2018
Active quantum error correction has been identified as a crucial ingredient of future quantum computers, motivating the recent experimental efforts to encode logical quantum bits using small topological codes. In addition to the demonstration of the ...
Demonstration of Topological Data Analysis on a Quantum Processor
Heliang Huang, Xi-Lin Wang, P. Rohde +7 more·Jan 19, 2018
Topological data analysis offers a robust way to extract useful information from noisy, unstructured data by identifying its underlying structure. Recently, an efficient quantum algorithm was proposed [Lloyd, Garnerone, Zanardi, Nat. Commun. 7, 10138...
General framework for constructing fast and near-optimal machine-learning-based decoder of the topological stabilizer codes
Amarsanaa Davaasuren, Yasunari Suzuki, K. Fujii +1 more·Jan 13, 2018
Quantum error correction is an essential technique for constructing a scalable quantum computer. In order to implement quantum error correction with near-term quantum devices, a fast and near-optimal decoding method is demanded. A decoder based on ma...
Parity-Controlled 2π Josephson Effect Mediated by Majorana Kramers Pairs.
C. Schrade, L. Fu·Jan 10, 2018
We study a time-reversal-invariant topological superconductor island hosting spatially separated Majorana Kramers pairs, with weak tunnel couplings to two s-wave superconducting leads. When the topological superconductor island is in the Coulomb bloc...
Low-depth circuit ansatz for preparing correlated fermionic states on a quantum computer
Pierre-Luc Dallaire-Demers, J. Romero, L. Veis +2 more·Jan 3, 2018
Quantum simulations are bound to be one of the main applications of near-term quantum computers. Quantum chemistry and condensed matter physics are expected to benefit from these technological developments. Several quantum simulation methods are know...
Majorana-Based Fermionic Quantum Computation.
T. O’Brien, P. Rożek, A. Akhmerov·Dec 6, 2017
Because Majorana zero modes store quantum information nonlocally, they are protected from noise, and have been proposed as a building block for a quantum computer. We show how to use the same protection from noise to implement universal fermionic qua...
High-threshold fault-tolerant quantum computation with analog quantum error correction
Kosuke Fukui, A. Tomita, A. Okamoto +1 more·Dec 1, 2017
To implement fault-tolerant quantum computation with continuous variables, the Gottesman-Kitaev-Preskill (GKP) qubit has been recognized as an important technological element. However,it is still challenging to experimentally generate the GKP qubit w...
Bravyi-Kitaev Superfast simulation of electronic structure on a quantum computer.
Kanav Setia, J. Whitfield·Dec 1, 2017
Present quantum computers often work with distinguishable qubits as their computational units. In order to simulate indistinguishable fermionic particles, it is first required to map the fermionic state to the state of the qubits. The Bravyi-Kitaev S...
Strictly local one-dimensional topological quantum error correction with symmetry-constrained cellular automata
Nicolai Lang, H. P. Buchler·Nov 22, 2017
Active quantum error correction on topological codes is one of the most promising routes to long-term qubit storage. In view of future applications, the scalability of the used decoding algorithms in physical implementations is crucial. In this work,...
Understanding Quantum Tunneling using Diffusion Monte Carlo Simulations
E. Inack, G. Giudici, T. Parolini +2 more·Nov 21, 2017
In simple ferromagnetic quantum Ising models characterized by an effective double-well energy landscape the characteristic tunneling time of path-integral Monte Carlo (PIMC) simulations has been shown to scale as the incoherent quantum-tunneling time...
Robust quantum state transfer via topological edge states in superconducting qubit chains
F. Mei, Gang Chen, L. Tian +2 more·Nov 21, 2017
Robust quantum state transfer (QST) is an indispensable ingredient in scalable quantum information processing. Here we present an experimentally feasible mechanism for realizing robust QST via topologically protected edge states in superconducting qu...
Interference and correlated coherence in disordered and localized quantum walk
Shivani Singh, C. M. Chandrashekar·Nov 16, 2017
Quantum walk has played an important role in development of quantum algorithms and protocols for quantum simulations. The speedup observed in quantum walk algorithms is attributed to quantum interference of spreading wave packet in position space. Si...
Lattice surgery on the Raussendorf lattice
Daniel Herr, A. Paler, S. Devitt +1 more·Nov 14, 2017
Lattice surgery is a method to perform quantum computation fault-tolerantly by using operations on boundary qubits between different patches of the planar code. This technique allows for universal planar code computation without eliminating the intri...
Topology in time-reversal symmetric crystals
J. Kruthoff, J. de Boer, Jasper van Wezel·Nov 13, 2017
The discovery of topological insulators has reformed modern materials science, promising to be a platform for tabletop relativistic physics, electronic transport without scattering, and stable quantum computation. Topological invariants are used to l...
Universal quantum computing using (Z d ) 3 symmetry-protected topologically ordered states
Yanzhu Chen, A. Prakash, T. Wei·Oct 31, 2017
Measurement-based quantum computation describes a scheme where entanglement of resource states is utilized to simulate arbitrary quantum gates via local measurements. Recent works suggest that symmetry-protected topologically non-trivial, short-range...