Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Almost-linear time decoding algorithm for topological codes
Nicolas Delfosse, Naomi H. Nickerson·Sep 19, 2017
In order to build a large scale quantum computer, one must be able to correct errors extremely fast. We design a fast decoding algorithm for topological codes to correct for Pauli errors and erasure and combination of both errors and erasure. Our alg...
Hardware-efficient bosonic quantum error-correcting codes based on symmetry operators
M. Niu, I. Chuang, J. Shapiro·Sep 15, 2017
We establish a symmetry-operator framework for designing quantum error correcting~(QEC) codes based on fundamental properties of the underlying system dynamics. Based on this framework, we propose three hardware-efficient bosonic QEC codes that are s...
Quantum walks on regular uniform hypergraphs
Y. Liu, Jiabin Yuan, Bo-jia Duan +1 more·Sep 15, 2017
Quantum walks on graphs have shown prioritized benefits and applications in wide areas. In some scenarios, however, it may be more natural and accurate to mandate high-order relationships for hypergraphs, due to the density of information stored inhe...
Observing pure effects of counter-rotating terms without ultrastrong coupling: A single photon can simultaneously excite two qubits
X. Wang, A. Miranowicz, Hong-rong Li +1 more·Sep 15, 2017
The coherent process that a single photon simultaneously excites two qubits has recently been theoretically predicted by [this https URL {Phys. Rev. Lett. 117, 043601 (2016)}]. We propose a different approach to observe a similar dynamical process ba...
A CNOT gate between multiphoton qubits encoded in two cavities
Serge Rosenblum, Yvonne Y Gao, P. Reinhold +8 more·Sep 15, 2017
Entangling gates between qubits are a crucial component for performing algorithms in quantum computers. However, any quantum algorithm must ultimately operate on error-protected logical qubits encoded in high-dimensional systems. Typically, logical q...
Quantum origin of life: methodological, epistemological and ontological issues
J. Quemada·Sep 15, 2017
The aim of this essay is to analyze the role of quantum mechanics as an inherent characteristic of life. During the last ten years the problem of the origin of life has become an innovative research subject approached by many authors. The essay is di...
Heterogeneous quantum computing for satellite constellation optimization: solving the weighted k-clique problem
Gideon Bass, Casey Tomlin, Vaibhaw Kumar +2 more·Sep 15, 2017
NP-hard optimization problems scale very rapidly with problem size, becoming unsolvable with brute force methods, even with supercomputing resources. Typically, such problems have been approximated with heuristics. However, these methods still take a...
Amortization does not enhance the max-Rains information of a quantum channel
M. Berta, M. Wilde·Sep 14, 2017
Given an entanglement measure E, the entanglement of a quantum channel is defined as the largest amount of entanglement E that can be generated from the channel, if the sender and receiver are not allowed to share a quantum state before using the cha...
Algorithms for Embedding Quantum-Dot Cellular Automata Networks onto a Quantum Annealing Processor
Jacob Retallick, M. Babcock, Miguel Aroca-Ouellette +9 more·Sep 14, 2017
Advancements in computing based on qubit networks, and in particular the flux-qubit processor architecture developed by D-Wave System's Inc., have enabled the physical simulation of quantum-dot cellular automata (QCA) networks beyond the limit of cla...
Quantum computational supremacy
A. Harrow, A. Montanaro·Sep 14, 2017
The field of quantum algorithms aims to find ways to speed up the solution of computational problems by using a quantum computer. A key milestone in this field will be when a universal quantum computer performs a computational task that is beyond the...
Quantum error correction for non-maximally entangled states
Ritajit Majumdar, S. Sur-Kolay·Sep 13, 2017
Quantum states have high affinity for errors and hence error correction is of utmost importance to realise a quantum computer. Laflamme showed that 5 qubits are necessary to correct a single error on a qubit. In a Pauli error model, four different ty...
Error Correction of Quantum Reference Frame Information
P. Hayden, Sepehr Nezami, S. Popescu +1 more·Sep 13, 2017
The existence of quantum error correcting codes is one of the most counterintuitive and potentially technologically important discoveries of quantum information theory. However, standard error correction refers to abstract quantum information, i.e., ...
Simulating Spin Chains Using a Superconducting Circuit: Gauge Invariance, Superadiabatic Transport, and Broken Time‐Reversal Symmetry
Antti Vepsäläinen, G. Paraoanu·Sep 12, 2017
Simulation of materials by using quantum processors is envisioned to be a major direction of development in quantum information science. Here, the mathematical analogies between a triangular spin lattice with Dzyaloshinskii–Moriya coupling on one edg...
Designing Kerr interactions using multiple superconducting qubit types in a single circuit
M. Elliott, J. Joo, E. Ginossar·Sep 12, 2017
The engineering of Kerr interactions is of great interest for processing quantum information in multipartite quantum systems and for investigating many-body physics in a complex cavity-qubit network. We study how coupling multiple different types of ...
qTorch: The quantum tensor contraction handler
E. Fried, Nicolas P. D. Sawaya, Yudong Cao +3 more·Sep 12, 2017
Classical simulation of quantum computation is necessary for studying the numerical behavior of quantum algorithms, as there does not yet exist a large viable quantum computer on which to perform numerical tests. Tensor network (TN) contraction is an...
Quantum Image Processing and Its Application to Edge Detection: Theory and Experiment
X. Yao, Hengyan Wang, Zeyang Liao +12 more·Sep 11, 2017
Processing of digital images is continuously gaining in volume and relevance, with concomitant demands on data storage, transmission and processing power. Encoding the image information in quantum-mechanical systems instead of classical ones and repl...
Learning to Detect Entanglement
Bingjie Wang·Sep 11, 2017
This paper introduces the forest algorithm, an algorithm that can detect entanglement through the use of decision trees generated by machine learning. Tests against similar tomography-based detection algorithms using experimental data and numerical s...
From the Quantum Approximate Optimization Algorithm to a Quantum Alternating Operator Ansatz
Stuart Hadfield, Zhihui Wang, B. O’Gorman +3 more·Sep 11, 2017
The next few years will be exciting as prototype universal quantum processors emerge, enabling the implementation of a wider variety of algorithms. Of particular interest are quantum heuristics, which require experimentation on quantum hardware for t...
Passive quantum error correction of linear optics networks through error averaging
Ryan J. Marshman, A. Lund, P. Rohde +1 more·Sep 7, 2017
We propose and investigate a method of error detection and noise correction for bosonic linear networks using a method of unitary averaging. The proposed error averaging does not rely on ancillary photons or control and feedforward correction circuit...
Quantum qubit switch: entropy and entanglement
Marek Sawerwain, Joanna Wi'sniewska·Sep 7, 2017
The quantum entanglement is considered as one of the most important notions of quantum computing. The entanglement is a feature of quantum systems and it is used as a basis for many quantum algorithms and protocols. In this paper we analyze the level...