Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Substochastic Monte Carlo Algorithms
Michael Jarret, Brad Lackey·Apr 28, 2017
In this paper we introduce and formalize Substochastic Monte Carlo (SSMC) algorithms. These algorithms, originally intended to be a better classical foil to quantum annealing than simulated annealing, prove to be worthy optimization algorithms in the...
Electromagnetically Induced Transparency in Circuit Quantum Electrodynamics with Nested Polariton States.
J. Long, H. Ku, Xian Wu +5 more·Apr 28, 2017
Quantum networks will enable extraordinary capabilities for communicating and processing quantum information. These networks require a reliable means of storage, retrieval, and manipulation of quantum states at the network nodes. A node receives one ...
The ZX calculus is a language for surface code lattice surgery
N. de Beaudrap, D. Horsman·Apr 27, 2017
A leading choice of error correction for scalable quantum computing is the surface code with lattice surgery. The basic lattice surgery operations, the merging and splitting of logical qubits, act non-unitarily on the logical states and are not easil...
On the implausibility of classical client blind quantum computing
S. Aaronson, Alexandru Cojocaru, A. Gheorghiu +1 more·Apr 27, 2017
We define the functionality of delegated pseudo-secret random qubit generator (PSRQG), where a classical client can instruct the preparation of a sequence of random qubits at some distant party. Their classical description is (computationally) unknow...
Towards a heralded eigenstate-preserving measurement of multi-qubit parity in circuit QED
Patrick Huembeli, S. Nigg·Apr 27, 2017
Eigenstate-preserving multi-qubit parity measurements lie at the heart of stabilizer quantum error correction, which is a promising approach to mitigate the problem of decoherence in quantum computers. In this work we explore a high-fidelity, eigenst...
Hardware for dynamic quantum computing.
C. Ryan, Blake R. Johnson, D. Ristè +2 more·Apr 26, 2017
We describe the hardware, gateware, and software developed at Raytheon BBN Technologies for dynamic quantum information processing experiments on superconducting qubits. In dynamic experiments, real-time qubit state information is fed back or fed for...
Deterministic generation of a four-qubit W state using one- and two-qubit gates
Firat Diker, Can Yesilyurt·Apr 25, 2017
We propose an optical scheme to build an entangled network composed of W state based on polarization encoded qubits (photons). This new setup consists of 2 cNOT gates, 4 V gates, 2 Hadamard gates and basic optical tools such as polarizing beamsplitte...
Coherence as a Unit Resource for Quantum Error Correction
K. C. Tan, S. Omkar, H. Jeong·Apr 25, 2017
In this paper we study an error correcting protocol that specifically derives its error correcting properties from elementary units of coherence. The entire protocol from beginning to end is performed using non-coherence increasing operations, result...
An all-pair quantum SVM approach for big data multiclass classification
Arit Kumar Bishwas, A. Mani, V. Palade·Apr 25, 2017
In this paper, we discuss a quantum approach for the all-pair multiclass classification problem. In an all-pair approach, there is one binary classification problem for each pair of classes, and so there are k(k − 1)/2 classifiers for a k-class class...
Post-Quantum Cryptography: S381 Cyclic Subgroup of High Order
P. Hecht·Apr 24, 2017
Currently there is an active Post-Quantum Cryptography (PQC) solutions search, which attempts to find cryptographic protocols resistant to attacks by means of for instance Shor polynomial time algorithm for numerical field problems like integer facto...
Noise in one-dimensional measurement-based quantum computing
N. Usher, D. Browne·Apr 24, 2017
Measurement-Based Quantum Computing (MBQC) is an alternative to the quantum circuit model, whereby the computation proceeds via measurements on an entangled resource state. Noise processes are a major experimental challenge to the construction of a q...
Quantum algorithm for tree size estimation, with applications to backtracking and 2-player games
A. Ambainis, M. Kokainis·Apr 22, 2017
We study quantum algorithms on search trees of unknown structure, in a model where the tree can be discovered by local exploration. That is, we are given the root of the tree and access to a black box which, given a vertex v, outputs the children of ...
Autonomous calibration of single spin qubit operations
Florian Frank, Thomas Unden, J. Zoller +5 more·Apr 21, 2017
Fully autonomous precise control of qubits is crucial for quantum information processing, quantum communication, and quantum sensing applications. It requires minimal human intervention on the ability to model, to predict, and to anticipate the quant...
Fault-tolerant quantum computing in the Pauli or Clifford frame with slow error diagnostics
C. Chamberland, Pavithran Iyer, D. Poulin·Apr 21, 2017
We consider the problem of fault-tolerant quantum computation in the presence of slow error diagnostics, either caused by measurement latencies or slow decoding algorithms. Our scheme offers a few improvements over previously existing solutions, for ...
Quantum information density scaling and qubit operation time constraints of CMOS silicon-based quantum computer architectures
D. Rotta, F. Sebastiano, E. Charbon +1 more·Apr 20, 2017
Even the quantum simulation of an apparently simple molecule such as Fe2S2 requires a considerable number of qubits of the order of 106, while more complex molecules such as alanine (C3H7NO2) require about a hundred times more. In order to assess suc...
Adaptive quantum metrology under general Markovian noise
R. Demkowicz-Dobrzański, J. Czajkowski, J. Czajkowski +1 more·Apr 20, 2017
We consider a general model of unitary parameter estimation in presence of Markovian noise, where the parameter to be estimated is associated with the Hamiltonian part of the dynamics. In absence of noise, unitary parameter can be estimated with prec...
Deterministic quantum annealing expectation-maximization algorithm
Hideyuki Miyahara, K. Tsumura, Yuki Sughiyama·Apr 19, 2017
Maximum likelihood estimation (MLE) is one of the most important methods in machine learning, and the expectation-maximization (EM) algorithm is often used to obtain maximum likelihood estimates. However, EM heavily depends on initial configurations ...
Thermodynamic effects of single-qubit operations in silicon-based quantum computing
P. Lougovski, N. Peters·Apr 18, 2017
Abstract Silicon-based quantum logic is a promising technology to implement universal quantum computing. It is widely believed that a millikelvin cryogenic environment will be necessary to accommodate silicon-based qubits. This prompts a question of ...
Maximal violation of Bell inequalities under local filtering
Ming Li, Huihui Qin, Jing Wang +2 more·Apr 18, 2017
We investigate the behavior of the maximal violations of the CHSH inequality and Vèrtesi’s inequality under the local filtering operations. An analytical method has been presented for general two-qubit systems to compute the maximal violation of the ...
A NASA perspective on quantum computing: Opportunities and challenges
R. Biswas, Zhang Jiang, Kostya Kechezhi +10 more·Apr 17, 2017
NASA Perspective on Quantum Computing. In the last couple of decades, the world has seen several stunning instances of quantum algorithms that provably outperform the best classical algorithms. For most problems, however, it is currently unknown whet...