Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Faithful conversion of propagating quantum information to mechanical motion
A. Reed, A. Reed, K. Mayer +15 more·Mar 7, 2017
Combining micrometre-sized mechanical resonators with superconducting quantum circuits, quantum information encoded with photons now can be converted to the motion of a macroscopic object. The motion of micrometre-sized mechanical resonators can now ...
Experimental Bayesian Quantum Phase Estimation on a Silicon Photonic Chip.
S. Paesani, A. A. Gentile, R. Santagati +5 more·Mar 7, 2017
Quantum phase estimation is a fundamental subroutine in many quantum algorithms, including Shor's factorization algorithm and quantum simulation. However, so far results have cast doubt on its practicability for near-term, nonfault tolerant, quantum ...
A Discrete Fourier Transform on Lattices with Quantum Applications
Lior Eldar, P. Shor·Mar 7, 2017
In this work, we introduce a definition of the Discrete Fourier Transform (DFT) on Euclidean lattices in $\R^n$, that generalizes the $n$-th fold DFT of the integer lattice $\Z^n$ to arbitrary lattices. This definition is not applicable for every lat...
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...
Implementation of rigorous renormalization group method for ground space and low-energy states of local Hamiltonians
Brenden Roberts, T. Vidick, O. Motrunich·Mar 6, 2017
The success of polynomial-time tensor network methods for computing ground states of certain quantum local Hamiltonians has recently been given a sound theoretical basis by Arad et al. [Math. Phys. 356, 65 (2017)]. The convergence proof, however, rel...
Quantum coherence and geometric quantum discord
Ming‐Liang Hu, Xueyuan Hu, Jieci Wang +3 more·Mar 6, 2017
Quantum coherence and quantum correlations are of fundamental and practical significance for the development of quantum mechanics.They are also cornerstones of quantum computation and quantum communication theory. Searching physically meaningful and ...
Proposed optical realisation of a two photon, four-qubit entangled χ state
Atirach Ritboon, S. Croke, S. Barnett·Mar 6, 2017
The four-qubit states ∣ χ ij 〉 , exhibiting genuine multi-partite entanglement have been shown to have many interesting properties and have been suggested for novel applications in quantum information processing. In this work we propose a simple quan...
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 ...
Modeling the atomtronic analog of an optical polarizing beam splitter, a half-wave plate, and a quarter-wave plate for phonons of the motional state of two trapped atoms
N. Mohseni, M. Fani, J. Dowling +1 more·Mar 5, 2017
In this paper we propose a scheme to model the phonon analog of optical elements, including a polarizing beam splitter, a half- wave plate, and a quarter- wave plate, as well as an implementation of CNOT and Pauli gates, by using two atoms confined i...
Linear-Time Maximum Likelihood Decoding of Surface Codes over the Quantum Erasure Channel
Nicolas Delfosse, G. Zémor·Mar 4, 2017
Surface codes are among the best candidates to ensure the fault-tolerance of a quantum computer. In order to avoid the accumulation of errors during a computation, it is crucial to have at our disposal a fast decoding algorithm to quickly identify a...
Direct digital synthesis of microwave waveforms for quantum computing
J. Raftery, A. Vrajitoarea, G. Zhang +3 more·Mar 2, 2017
Current state of the art quantum computing experiments in the microwave regime use control pulses generated by modulating microwave tones with baseband signals generated by an arbitrary waveform generator (AWG). Recent advances in digital analog conv...
Unbiased simulation of near-Clifford quantum circuits
R. Bennink, Erik M. Ferragut, T. Humble +4 more·Mar 1, 2017
Modeling and simulation is essential for predicting and verifying the behavior of fabricated quantum circuits, but existing simulation methods are either impractically costly or require an unrealistic simplification of error processes. We present a m...
Open source Matrix Product States: Opening ways to simulate entangled many-body quantum systems in one dimension
Daniel Jaschke, M. Wall, L. Carr·Mar 1, 2017
Abstract Numerical simulations are a powerful tool to study quantum systems beyond exactly solvable systems lacking an analytic expression. For one-dimensional entangled quantum systems, tensor network methods, amongst them Matrix Product States (MPS...
Quantum Information Set Decoding Algorithms
Ghazal Kachigar, J. Tillich·Mar 1, 2017
The security of code-based cryptosystems such as the McEliece cryptosystem relies primarily on the difficulty of decoding random linear codes. The best decoding algorithms are all improvements of an old algorithm due to Prange: they are known under t...
Towards topological quantum computer
Dmitry Melnikov, Dmitry Melnikov, A. Mironov +4 more·Mar 1, 2017
Abstract Quantum R-matrices, the entangling deformations of non-entangling (classical) permutations, provide a distinguished basis in the space of unitary evolutions and, consequently, a natural choice for a minimal set of basic operations (universal...
Quantum Error Correction for Complex and Majorana Fermion Qubits
S. Vijay, L. Fu·Mar 1, 2017
We introduce error-correcting codes that can correct for fermion parity-violating (quasiparticle poisoning) and parity-conserving errors in systems of complex fermions and of Majorana fermions. After establishing properties of fermion codes, we intro...
Multipartite entanglement detection for hypergraph states
Maddalena Ghio, D. Malpetti, M. Rossi +2 more·Mar 1, 2017
We study the entanglement properties of quantum hypergraph states of n qubits, focusing on multipartite entanglement. We compute multipartite entanglement for hypergraph states with a single hyperedge of maximum cardinality, for hypergraph states end...
BQP-completeness of scattering in scalar quantum field theory
S. Jordan, H. Krovi, Keith S. M. Lee +1 more·Mar 1, 2017
Recent work has shown that quantum computers can compute scattering probabilities in massive quantum field theories, with a run time that is polynomial in the number of particles, their energy, and the desired precision. Here we study a closely relat...
Dissipative quantum error correction and application to quantum sensing with trapped ions
F. Reiter, A. Sørensen, P. Zoller +1 more·Feb 28, 2017
Quantum-enhanced measurements hold the promise to improve high-precision sensing ranging from the definition of time standards to the determination of fundamental constants of nature. However, quantum sensors lose their sensitivity in the presence of...
Complex Networks: from Classical to Quantum
J. Biamonte, Mauro Faccin, M. Domenico·Feb 27, 2017
Recent progress in applying complex network theory to problems faced in quantum information and computation has resulted in a beneficial crossover between two fields. Complex network methods have successfully been used to characterize quantum walk an...