Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
GraphStateVis: Interactive Visual Analysis of Qubit Graph States and their Stabilizer Groups
Matthias Miller, Daniel Miller·May 26, 2021
Fathoming out quantum state space is a challenging endeavor due to its exponentially growing dimensionality. At the expense of being bound in its expressiveness, the discrete and finite subspace of graph states is easier to investigate via a pictoria...
Compressed Sensing Measurement of Long-Range Correlated Noise
Alireza Seif, M. Hafezi, Yi-Kai Liu·May 26, 2021
Long-range correlated errors can severely impact the performance of NISQ (noisy intermediate-scale quantum) devices, and fault-tolerant quantum computation. Characterizing these errors is important for improving the performance of these devices, via ...
A quantum Hopfield associative memory implemented on an actual quantum processor
N. Miller, S. Mukhopadhyay·May 25, 2021
In this work, we present a Quantum Hopfield Associative Memory (QHAM) and demonstrate its capabilities in simulation and hardware using IBM Quantum Experience.. The QHAM is based on a quantum neuron design which can be utilized for many different mac...
A Survey and Tutorial on Security and Resilience of Quantum Computing
Abdullah Ash-Saki, M. Alam, Koustubh Phalak +3 more·May 24, 2021
Present-day quantum computers suffer from various noises or errors such as, gate error, relaxation, dephasing, readout error, and crosstalk. Besides, they offer a limited number of qubits with restrictive connectivity. Therefore, quantum programs run...
Quantum metrology with one auxiliary particle in a correlated bath and its quantum simulation
Wan-Ting He, Huan-yu Guang, Ziang Li +5 more·May 21, 2021
In realistic metrology, entangled probes are more sensitive to noise, especially for a correlated environment. The precision of parameter estimation with entangled probes is even lower than that of the unentangled ones in a correlated environment. In...
Pulse-level noisy quantum circuits with QuTiP
Boxi Li, Shahnawaz Ahmed, Sidhant Saraogi +4 more·May 20, 2021
The study of the impact of noise on quantum circuits is especially relevant to guide the progress of Noisy Intermediate-Scale Quantum (NISQ) computing. In this paper, we address the pulse-level simulation of noisy quantum circuits with the Quantum To...
Holographic dynamics simulations with a trapped-ion quantum computer
E. Chertkov, J. Bohnet, David Francois +9 more·May 19, 2021
Quantum computers promise to efficiently simulate quantum dynamics, a classically intractable task central to fields ranging from chemistry to high-energy physics. Yet, quantum computational advantage has only been demonstrated for artificial tasks s...
Neural Error Mitigation of Near-Term Quantum Simulations
Elizabeth R. Bennewitz, Florian Hopfmueller, B. Kulchytskyy +2 more·May 17, 2021
Near-term quantum computers provide a promising platform for finding the ground states of quantum systems, which is an essential task in physics, chemistry and materials science. However, near-term approaches are constrained by the effects of noise, ...
Quantum error reduction with deep neural network applied at the post-processing stage
A. Zhukov, W. Pogosov·May 17, 2021
Deep neural networks (DNN) can be applied at the post-processing stage for the improvement of the results of quantum computations on noisy intermediate-scale quantum (NISQ) processors. Here, we propose a method based on this idea, which is most suita...
Cyberattacks on Quantum Networked Computation and Communications - Hacking the Superdense Coding Protocol on IBM's Quantum Computers
C. Gonçalves·May 15, 2021
The development of automated gate specification for quantum communications and quantum networked computation opens up the way for malware designed at corrupting the automation software, changing the automated quantum communications protocols and algo...
Quantum dot-based high-fidelity universal quantum gates in noisy environment
Y. Tiwari, Aditya Dev, V. Poonia·May 14, 2021
Quantum dot-based spin qubit realization is one of the most promising quantum computing systems owing to its integrability with classical computation hardware and its versatility in realizing qubits and quantum gates. In this work, we investigate a q...
Charge qubits in the USC regime for quantum state transfer
F. C'ardenas-L'opez, J. Yu, C. K. Andersen +2 more·May 14, 2021
We study the feasibility of reaching the ultrastrong (USC) and deep-strong coupling (DSC) regimes of light-matter interaction, in particular at resonance condition, with a superconducting charge qubit, also known as Cooper-Pair box (CPB). We numerica...
Detection of entanglement during pure dephasing evolutions for systems and environments of any size
M. Strzałka, K. Roszak·May 14, 2021
W generalize the scheme for detection of qubit-environment entanglement to qudit-environment systems. This is of relevance for many-qubit systems and the quantification of the operation of quantum algorithms under the influence of external noise, sin...
Numerical hardware-efficient variational quantum simulation of a soliton solution
A. Kardashin, A. Pervishko, J. Biamonte +1 more·May 13, 2021
Implementing variational quantum algorithms with noisy intermediate-scale quantum machines of up to a hundred qubits is nowadays considered as one of the most promising routes towards achieving a quantum practical advantage. In multiqubit circuits, r...
Implementing Quantum Finite Automata Algorithms on Noisy Devices
Utku Birkan, Özlem Salehi, Viktor Olejar +2 more·May 13, 2021
Quantum finite automata (QFAs) literature offers an alternative mathematical model for studying quantum systems with finite memory. As a superiority of quantum computing, QFAs have been shown exponentially more succinct on certain problems such as re...
Hardware-Efficient Microwave-Activated Tunable Coupling between Superconducting Qubits.
B. Mitchell, R. Naik, A. Morvan +7 more·May 12, 2021
Generating high-fidelity, tunable entanglement between qubits is crucial for realizing gate-based quantum computation. In superconducting circuits, tunable interactions are often implemented using flux-tunable qubits or coupling elements, adding cont...
Prime number factorization using a spinor Bose–Einstein condensate-inspired topological quantum computer
Emil Génetay Johansen, T. Simula·May 12, 2021
Inspired by non-abelian vortex anyons in spinor Bose–Einstein condensates, we consider the quantum double D(Q8)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \use...
Benchmarking near-term quantum computers via random circuit sampling
Yunchao Liu, M. Otten, Roozbeh Bassirianjahromi +2 more·May 11, 2021
The increasing scale of near-term quantum hardware motivates the need for efficient noise characterization methods, since qubit and gate level techniques cannot capture crosstalk and correlated noise in many qubit systems. While scalable approaches, ...
Coherent manipulation of graph states composed of finite-energy Gottesman-Kitaev-Preskill-encoded qubits
K. Seshadreesan, Prajit Dhara, A. Patil +2 more·May 10, 2021
Graph states are a central resource in measurement-based quantum information processing. In the photonic qubit architecture based on Gottesman-Kitaev-Preskill (GKP) encoding, the generation of high-fidelity graph states composed of realistic, finite-en...
Sampling-based quasiprobability simulation for fault-tolerant quantum error correction on the surface codes under coherent noise
Shigeo Hakkaku, K. Mitarai, K. Fujii·May 10, 2021
Shigeo Hakkaku, ∗ Kosuke Mitarai, 2, 3, † and Keisuke Fujii 2, 4, 5, ‡ Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka 560-8531, Japan Center for Quantum Information and Quantum Biology, Osaka University, ...