Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Modeling observers as physical systems representing the world from within: Quantum theory as a physical and self-referential theory of inference
John Realpe-G'omez·May 11, 2017
In 1929 Szilard pointed out that the physics of the observer may play a role in the analysis of experiments. The same year, Bohr pointed out that complementarity appears to arise naturally in psychology where both the objects of perception and the pe...
Assessing the progress of trapped-ion processors towards fault-tolerant quantum computation
A. Bermudez, A. Bermudez, Xiaosi Xu +15 more·May 8, 2017
A quantitative assessment of the progress of small prototype quantum processors towards fault-tolerant quantum computation is a problem of current interest in experimental and theoretical quantum information science. We introduce a necessary and fair...
Efficient classical verification of quantum computations
R. Jozsa, Sergii Strelchuk·May 8, 2017
We propose an efficient scheme for verifying quantum computations in the ‘high complexity’ regime i.e. beyond the remit of classical computers. Previously proposed schemes remarkably provide confidence against arbitrarily malicious adversarial behavi...
Completing the Physical Representation of Quantum Algorithms Provides a Quantitative Explanation of Their Computational Speedup
G. Castagnoli·May 7, 2017
The usual representation of quantum algorithms, limited to the process of solving the problem, is physically incomplete. We complete it in three steps: (i) extending the representation to the process of setting the problem, (ii) relativizing the exte...
Extensible 3D architecture for superconducting quantum computing
Qiang Liu, Mengmeng Li, Kunzhe Dai +5 more·May 7, 2017
Using a multi-layered printed circuit board, we propose a 3D architecture suitable for packaging supercon- ducting chips, especially chips that contain two-dimensional qubit arrays. In our proposed architecture, the center strips of the buried coplan...
Thermocompression bonding technology for multilayer superconducting quantum circuits
C. McRae, Jérémy H. Béjanin, Z. Pagel +5 more·May 6, 2017
Extensible quantum computing architectures require a large array of quantum bits operating with low error rates. A quantum processor based on superconducting devices can be scaled up by stacking microchips that perform wiring, shielding, and computat...
Coherent oscillations inside a quantum manifold stabilized by dissipation
S. Touzard, A. Grimm, Z. Leghtas +13 more·May 5, 2017
Manipulating the state of a logical quantum bit usually comes at the expense of exposing it to decoherence. Fault-tolerant quantum computing tackles this problem by manipulating quantum information within a stable manifold of a larger Hilbert space, ...
Quantum Error Correction with Only Two Extra Qubits.
R. Chao, B. Reichardt·May 5, 2017
Noise rates in quantum computing experiments have dropped dramatically, but reliable qubits remain precious. Fault-tolerance schemes with minimal qubit overhead are therefore essential. We introduce fault-tolerant error-correction procedures that use...
Quantum SDP-Solvers: Better Upper and Lower Bounds
Joran van Apeldoorn, András Gilyén, S. Gribling +1 more·May 4, 2017
Brandão and Svore recently gave quantum algorithms for approximately solving semidefinite programs, which in some regimes are faster than the best-possible classical algorithms in terms of the dimension n of the problem and the number m of const...
Graph Partitioning using Quantum Annealing on the D-Wave System
Hayato Ushijima-Mwesigwa, C. Negre, S. Mniszewski·May 4, 2017
Graph partitioning (GP) applications are ubiquitous throughout mathematics, computer science, chemistry, physics, bio-science, machine learning, and complex systems. Post Moore's era supercomputing has provided us an opportunity to explore new approa...
Improving the Accuracy of an Adiabatic Quantum Computer
J. Dorband·May 4, 2017
The purpose of the D-Wave adiabatic quantum computer is to find a set of qubit values that minimize its objective function. For various reasons, the set of qubit values returned by the D-Wave has errors. This paper presents a method of improving the ...
Universal fault-tolerant quantum computation with Bacon-Shor codes
Theodore J. Yoder·May 4, 2017
We present a fault-tolerant universal gate set consisting of Hadamard and controlled-controlled-Z (CCZ) on Bacon-Shor subsystem codes. Transversal non-Clifford gates on these codes are intriguing in that higher levels of the Clifford hierarchy become...
Topological quantum error correction in the Kitaev honeycomb model
Yi-Chan Lee, Courtney G. Brell, S. Flammia·May 3, 2017
The Kitaev honeycomb model is an approximate topological quantum error correcting code in the same phase as the toric code, but requiring only a 2-body Hamiltonian. As a frustrated spin model, it is well outside the commuting models of topological qu...
Quantum Fourier Sampling is Guaranteed to Fail to Compute Automorphism Groups of Easy Graphs
Omar Shehab, S. Lomonaco·May 2, 2017
The quantum hidden subgroup approach is an actively studied approach to solve combinatorial problems in quantum complexity theory. With the success of the Shor's algorithm, it was hoped that similar approach may be useful to solve the other combinato...
Decoding small surface codes with feedforward neural networks
Savvas Varsamopoulos, B. Criger, K. Bertels·May 2, 2017
Surface codes reach high error thresholds when decoded with known algorithms, but the decoding time will likely exceed the available time budget, especially for near-term implementations. To decrease the decoding time, we reduce the decoding problem ...
Tree tensor network approach to simulating Shor's algorithm
E. Dumitrescu·May 2, 2017
Simulating quantum systems constructively furthers our understanding of qualitative and quantitative features which may be analytically intractable. In this letter, we directly simulate and explore the entanglement structure present in a paradigmatic...
Random access quantum information processors using multimode circuit quantum electrodynamics
R. Naik, N. Leung, S. Chakram +6 more·May 1, 2017
Qubit connectivity is an important property of a quantum processor, with an ideal processor having random access—the ability of arbitrary qubit pairs to interact directly. This a challenge with superconducting circuits, as state-of-the-art architectu...
Reinforcement Learning in Different Phases of Quantum Control
M. Bukov, A. Day, Dries Sels +3 more·May 1, 2017
The ability to prepare a physical system in a desired quantum state is central to many areas of physics such as nuclear magnetic resonance, cold atoms, and quantum computing. Yet, preparing states quickly and with high fidelity remains a formidable c...
An entangling-probe attack on Shor’s algorithm for factorization
H. Azuma·Apr 30, 2017
Abstract We investigate how to attack Shor’s quantum algorithm for factorization with an entangling probe. We show that an attacker can steal an exact solution of Shor’s algorithm outside an institute where the quantum computer is installed if he rep...
Arbitrary Control of Entanglement between two nitrogen-vacancy center ensembles coupling to superconducting circuit qubit
Wanjun Su, Zhen‐Biao Yang, Zhi-Rong Zhong·Apr 28, 2017
We propose an effective scheme for realizing a Jaynes-Cummings (J-C) model with the collective nitrogen-vacancy center ensembles (NVE) bosonic modes in a hybrid system. Specifically, the controllable transmon qubit can alternatively interact with one...