Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Fast quantum logic gates with trapped-ion qubits
V. M. Schäfer, C. Ballance, K. Thirumalai +4 more·Sep 20, 2017
Quantum bits (qubits) based on individual trapped atomic ions are a promising technology for building a quantum computer. The elementary operations necessary to do so have been achieved with the required precision for some error-correction schemes. H...
Low loss QKD optical scheme for fast polarization encoding
A. Duplinskiy, V. Ustimchik, A. Kanapin +2 more·Sep 19, 2017
We present a new optical scheme for BB84 protocol quantum key distribution (QKD). The proposed setup consists of a compact all-fiber polarization encoding optical scheme based on LiNbO3 phase modulators, single laser source and two single-photon dete...
Entropy Control Architectures for Next-Generation Supercomputers
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...
Low-Latency Digital Signal Processing for Feedback and Feedforward in Quantum Computing and Communication
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...
On the Generation of Random Ensembles of Qubits and Qutrits Computing Separability Probabilities for Fixed Rank States
A. Khvedelidze, I. Rogojin·Aug 25, 2017
The generation of random mixed states is discussed, aiming for the computation of probabilistic characteristics of composite finite dimensional quantum systems. In particular, we consider the generation of random Hilbert-Schmidt and Bures ensembles o...
Conditional displacement interaction in ultrastrong-coupling regime
Gangcheng Wang, Qingyong Wang, Yimin Wang +3 more·Aug 15, 2017
We investigate the realization of conditional displacement interaction in the transversal direction in ultrastrongly coupled circuit quantum electrodynamics by adjusting parameters of external magnetic fields. The special interaction is derived in th...
Coherence properties of the 0-π qubit
Peter Groszkowski, A. Paolo, A. Grimsmo +5 more·Aug 9, 2017
Superconducting circuits rank among some of the most interesting architectures for the implementation of quantum information processing devices. The recently proposed 0-π qubit (Brooks et al 2013 Phys. Rev. A 87 52306) promises increased protection f...
Traffic Flow Optimization Using a Quantum Annealer
F. Neukart, G. Compostella, Christian Seidel +3 more·Aug 4, 2017
Quantum annealing algorithms belong to the class of meta-heuristic tools, applicable for solving binary optimization problems. Hardware implementations of quantum annealing, such as the quantum processing units (QPUs) produced by D-Wave Systems, have...
The upside of noise: engineered dissipation as a resource in superconducting circuits
E. Kapit·Aug 2, 2017
Historically, noise in superconducting circuits has been considered an obstacle to be removed. A large fraction of the research effort in designing superconducting circuits has focused on noise reduction, with great success, as coherence times have i...
Quantum machine learning: a classical perspective
C. Ciliberto, M. Herbster, Alessandro Davide Ialongo +4 more·Jul 26, 2017
Recently, increased computational power and data availability, as well as algorithmic advances, have led machine learning (ML) techniques to impressive results in regression, classification, data generation and reinforcement learning tasks. Despite t...
Electro-optic routing of photons from a single quantum dot in photonic integrated circuits
L. Midolo, S. L. Hansen, Weili Zhang +6 more·Jul 20, 2017
Recent breakthroughs in solid-state photonic quantum technologies enable the generation and detection of single photons with near-unity efficiency as required for a range of photonic quantum technologies. The lack of methods to simultaneously generat...
Hardware-efficient fermionic simulation with a cavity–QED system
Guanyu Zhu, Yiğit Subaşı, J. Whitfield +1 more·Jul 15, 2017
In digital quantum simulation of fermionic models with qubits, non-local maps for encoding are often encountered. Such maps require linear or logarithmic overhead in circuit depth which could render the simulation useless, for a given decoherence tim...
Arbitrarily exhaustive hypergraph generation of 4-, 6-, 8-, 16-, and 32-dimensional quantum contextual sets
M. Pavičić·Jun 26, 2017
Quantum contextuality turns out to be a necessary resource for universal quantum computation and important in the field of quantum information processing. It is therefore of interest both for theoretical considerations and for experimental implementa...
Wavevector multiplexed atomic quantum memory via spatially-resolved single-photon detection
Michał Parniak, M. Dąbrowski, Mateusz Mazelanik +3 more·Jun 14, 2017
Parallelized quantum information processing requires tailored quantum memories to simultaneously handle multiple photons. The spatial degree of freedom is a promising candidate to facilitate such photonic multiplexing. Using a single-photon resolving...
Logic Synthesis for Quantum Computing
Mathias Soeken, M. Rötteler, N. Wiebe +1 more·Jun 8, 2017
We present a synthesis framework to map logic networks into quantum circuits for quantum computing. The synthesis framework is based on LUT networks (lookup-table networks), which play a key role in conventional logic synthesis. Establishing a connec...
Integrated sources of photon quantum states based on nonlinear optics
L. Caspani, C. Xiong, B. Eggleton +5 more·Jun 6, 2017
The ability to generate complex optical photon states involving entanglement between multiple optical modes is not only critical to advancing our understanding of quantum mechanics but will play a key role in generating many applications in quantum t...
0.5 Petabyte Simulation of a 45-Qubit Quantum Circuit
Thomas Häner, Damian S. Steiger·Apr 4, 2017
Near-term quantum computers will soon reach sizes that are challenging to directly simulate, even when employing the most powerful supercomputers. Yet, the ability to simulate these early devices using classical computers is crucial for calibration, ...
Polarization-entangled photon pair sources based on spontaneous four wave mixing assisted by polarization mode dispersion
Pisek Kultavewuti, E. Zhu, Xingxing Xing +4 more·Mar 7, 2017
Photonic-based qubits and integrated photonic circuits have enabled demonstrations of quantum information processing (QIP) that promises to transform the way in which we compute and communicate. To that end, sources of polarization-entangled photon p...
Encoding qubits into oscillators with atomic ensembles and squeezed light
Keith R. Motes, B. Baragiola, A. Gilchrist +1 more·Mar 6, 2017
The Gottesman-Kitaev-Preskill (GKP) encoding of a qubit within an oscillator provides a number of advantages when used in a fault-tolerant architecture for quantum computing, most notably that Gaussian operations suffice to implement all single- and ...
Learning with Errors is easy with quantum samples
A. Grilo, Iordanis Kerenidis·Feb 27, 2017
Learning with Errors is one of the fundamental problems in computational learning theory and has in the last years become the cornerstone of post-quantum cryptography. In this work, we study the quantum sample complexity of Learning with Errors and s...