Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Machine learning topological phases in real space
N. L. Holanda, M. Griffith·Jan 7, 2019
We develop a supervised machine learning algorithm that is able to learn topological phases of finite condensed-matter systems from bulk data in real lattice space. The algorithm employs diagonalization in real space together with any supervised lear...
Faster quantum computation with permutations and resonant couplings
Yingkai Ouyang, Yi Shen, Lin Chen·Jan 2, 2019
Abstract Recently, there has been increasing interest in designing schemes for quantum computations that are robust against errors. Although considerable research has been devoted to quantum error correction schemes, much less attention has been paid...
Quantum-dot single-photon source on a CMOS silicon photonic chip integrated using transfer printing
R. Katsumi, Y. Ota, A. Osada +6 more·Dec 31, 2018
Silicon photonics is a powerful platform for implementing large-scale photonic integrated circuits (PICs), because of its compatibility with mature complementary-metal-oxide-semiconductor (CMOS) technology. Exploiting silicon-based PICs for quantum p...
Quantum Algorithm for Calculating Molecular Vibronic Spectra.
Nicolas P. D. Sawaya, J. Huh·Dec 26, 2018
We present a quantum algorithm for calculating the vibronic spectrum of a molecule, a useful but classically hard problem in chemistry. We show several advantages over previous quantum approaches: vibrational anharmonicity is naturally included; afte...
Semiconductor quantum computation
Xin Zhang, Haiou Li, Gang Cao +3 more·Dec 22, 2018
Abstract Semiconductors, a significant type of material in the information era, are becoming more and more powerful in the field of quantum information. In recent decades, semiconductor quantum computation was investigated thoroughly across the world...
Scalable fermionic error correction in Majorana surface codes
O. Viyuela, S. Vijay, L. Fu·Dec 20, 2018
We study the error correcting properties of Majorana Surface Codes (MSC), topological quantum codes constructed out of interacting Majorana fermions, which can be used to store quantum information and perform quantum computation. These quantum memori...
Towards long-distance quantum networks with superconducting processors and optical links
Sourabh Kumar, N. Lauk, C. Simon·Dec 20, 2018
We design a quantum repeater architecture, necessary for long distance quantum networks, using the recently proposed microwave cat state qubits, formed and manipulated via interaction between a superconducting nonlinear element and a microwave cavity...
Resonance energy transfer and quantum entanglement mediated by epsilon-near-zero and other plasmonic waveguide systems.
Ying Li, A. Nemilentsau, C. Argyropoulos·Dec 20, 2018
The resonance energy transfer and entanglement between two-level quantum emitters are typically limited to sub-wavelength distances due to the inherently short-range nature of the dipole-dipole interactions. Moreover, the entanglement of quantum syst...
QAOA for Max-Cut requires hundreds of qubits for quantum speed-up
G. Guerreschi, A. Y. Matsuura·Dec 18, 2018
Computational quantum technologies are entering a new phase in which noisy intermediate-scale quantum computers are available, but are still too small to benefit from active error correction. Even with a finite coherence budget to invest in quantum i...
Adaptive quantum state tomography with neural networks
Yihui Quek, Stanislav Fort, H. Ng·Dec 17, 2018
Current algorithms for quantum state tomography (QST) are costly both on the experimental front, requiring measurement of many copies of the state, and on the classical computational front, needing a long time to analyze the gathered data. Here, we i...
Error Mitigation in Quantum Computers subject to Spatially Correlated Noise
Vickram N. Premakumar, R. Joynt·Dec 17, 2018
The most common error models for quantum computers assume the independence of errors on different qubits. However, most noise mechanisms have some correlations in space. We show how to improve quantum information processing for few-qubit systems when...
The role of entropy in topological quantum error correction
M. Beverland, Benjamin J. Brown, M. Kastoryano +1 more·Dec 12, 2018
The performance of a quantum error-correction process is determined by the likelihood that a random configuration of errors introduced to the system will lead to the corruption of encoded logical information. In this work we compare two different var...
Combining the synergistic control capabilities of modeling and experiments: Illustration of finding a minimum-time quantum objective
Qiming Chen, Xiaodong Yang, C. Arenz +4 more·Dec 12, 2018
A common way to manipulate a quantum system, for example spins or artificial atoms, is to use properly tailored control pulses. In order to accomplish quantum information tasks before coherence is lost, it is crucial to implement the control in the s...
Stochastic estimation of dynamical variables
Stefan Krastanov, Sisi Zhou, S. Flammia +1 more·Dec 12, 2018
Estimating the parameters governing the dynamics of a system is a prerequisite for its optimal control. We present a simple but powerful method that we call STEADY, for STochastic Estimation algorithm for DYnamical variables, to estimate the Hamilton...
Tensor networks for complex quantum systems
R. Orús·Dec 10, 2018
Originally developed in the context of condensed-matter physics and based on renormalization group ideas, tensor networks have been revived thanks to quantum information theory and the progress in understanding the role of entanglement in quantum man...
Minimal Effective Gibbs Ansatz (MEGA): A simple protocol for extracting an accurate thermal representation for quantum simulation
Jeffrey Cohn, K. Najafi, Forest Yang +2 more·Dec 10, 2018
Quantum Gibbs state sampling algorithms generally suffer from either scaling exponentially with system size or requiring specific knowledge of spectral properties \textit{a priori}. Also, these algorithms require a large overhead of bath or scratch/a...
Universal quantum computing with thermal state bosonic systems
K. Marshall, D. James, A. Paler +1 more·Dec 10, 2018
Recent development of mixed-state encoding (MSE) allows pure-state logical information to be encoded by a bosonic (continuous-variable) system in mixed physical state. Despite interest due to its counterintuitiveness, the utility of the current MSE s...
Impossibility of blind quantum sampling for classical client
T. Morimae, H. Nishimura, Yuki Takeuchi +1 more·Dec 10, 2018
Blind quantum computing enables a client, who can only generate or measure single-qubit states, to delegate quantum computing to a remote quantum server in such a way that the input, output, and program are hidden from the server. It is an open probl...
Nonarchimedean holographic entropy from networks of perfect tensors
M. Heydeman, M. Marcolli, Sarthak Parikh +1 more·Dec 10, 2018
We consider a class of holographic quantum error-correcting codes, built from perfect tensors in network configurations dual to Bruhat-Tits trees and their quotients by Schottky groups corresponding to BTZ black holes. The resulting holographic st...
Generation and sampling of quantum states of light in a silicon chip
S. Paesani, Yunhong Ding, R. Santagati +7 more·Dec 7, 2018
Implementing large instances of quantum algorithms1–5 requires the processing of many quantum information carriers in a hardware platform that supports the integration of different components6. Although established semiconductor fabrication processes...