Papers
Live trends in quantum computing research, updated daily from arXiv.
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13,509 papers in 12 months (-19% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Entanglement Entropy in CFT and Modular Nuclearity
Lorenzo Panebianco, Benedikt Wegener·Aug 20, 2021
In the framework of Algebraic Quantum Field Theory, several operator algebraic notions of entanglement entropy can be associated with any pair of causally disjoint spacetime regions $\mathcal{S}_A$ and $\mathcal{S}_B$ with positive relative distance....
Exploiting Different Levels of Parallelism in the Quantum Control Microarchitecture for Superconducting Qubits
Mengyu Zhang, Lei Xie, Zhenxing Zhang +7 more·Aug 19, 2021
As current Noisy Intermediate Scale Quantum (NISQ) devices suffer from decoherence errors, any delay in the instruction execution of quantum control microarchitecture can lead to the loss of quantum information and incorrect computation results. Henc...
Robustly learning the Hamiltonian dynamics of a superconducting quantum processor
D. Hangleiter, I. Roth, J. Fuksa +2 more·Aug 18, 2021
Precise means of characterizing analog quantum simulators are key to developing quantum simulators capable of beyond-classical computations. Here, we precisely estimate the free Hamiltonian parameters of a superconducting-qubit analog quantum simulat...
Estimating distinguishability measures on quantum computers
Rochisha Agarwal, Soorya Rethinasamy, Kunal Sharma +1 more·Aug 18, 2021
The performance of a quantum information processing protocol is ultimately judged by distinguishability measures that quantify how distinguishable the actual result of the protocol is from the ideal case. The most prominent distinguishability measure...
Partial Measurements of Quantum Systems
J. Monroe·Aug 17, 2021
Projective measurement is a commonly used assumption in quantum mechanics. However, advances in quantum measurement techniques allow for partial measurements, which accurately estimate state information while keeping the wavefunction intact. In this ...
Reflection and transmission of electromagnetic pulses at a planar dielectric interface: Theory and quantum lattice simulations
A. Ram, G. Vahala, L. Vahala +1 more·Aug 16, 2021
There is considerable interest in the application of quantum information science to advance computations in plasma physics. Many of the topics in fusion plasma physics are classical in nature. In order to implement them on quantum computers it will r...
QDataSet, quantum datasets for machine learning
Elija Perrier, Akram Youssry, C. Ferrie·Aug 15, 2021
The availability of large-scale datasets on which to train, benchmark and test algorithms has been central to the rapid development of machine learning as a discipline. Despite considerable advancements, the field of quantum machine learning has thus...
LILLIPUT: A Lightweight Low-Latency Lookup-Table Based Decoder for Near-term Quantum Error Correction
Poulami Das, A. Locharla, Cody Jones·Aug 14, 2021
The error rates of quantum devices are orders of magnitude higher than what is needed to run most quantum applications. To close this gap, Quantum Error Correction (QEC) encodes logical qubits and distributes information using several physical qubits...
Playing with a Quantum Computer
Rainer Muller, Franziska Greinert·Aug 13, 2021
The new quantum technologies are currently attracting a great deal of public attention. This application area of quantum physics is expected to provide significant technological and economic opportunities. Major projects such as the Quantum Flagship ...
Real-time simulation of light-driven spin chains on quantum computers
M. Rodriguez-Vega, Elizabeth Carlander, A. Bahri +3 more·Aug 12, 2021
In this work, we study the real-time evolution of periodically driven (Floquet) systems on a quantum computer using IBM quantum devices. We consider a driven Landau–Zener model and compute the transition probability between the Floquet steady states ...
Quantum reinforcement learning: the maze problem
Nicola Dalla Pozza, L. Buffoni, Stefano Martina +1 more·Aug 10, 2021
Quantum machine learning (QML) is a young but rapidly growing field where quantum information meets machine learning. Here, we will introduce a new QML model generalising the classical concept of reinforcement learning to the quantum domain, i.e. qua...
Decodable hybrid dynamics of open quantum systems with <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi mathvariant="double-struck">Z</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math> symmetry
Yaodong Li, Matthew Fisher·Aug 9, 2021
We explore a class of"open"quantum circuit models with local decoherence ("noise") and local projective measurements, each respecting a global Z_2 symmetry. The model supports a spin glass phase where the Z_2 symmetry is spontaneously broken (not pos...
Universal quantum state preparation via revised greedy algorithm
Runhong He, Hai-Da Liu, Shengbin Wang +3 more·Aug 7, 2021
Preparation of quantum state lies at the heart of quantum information processing. The greedy algorithm provides a potential method to effectively prepare quantum state. However, the standard greedy (SG) algorithm, in general, cannot take the global m...
Automated Discovery of Autonomous Quantum Error Correction Schemes
Zhaoyou Wang, Taha Rajabzadeh, Nathan R. A. Lee +1 more·Aug 5, 2021
We can encode a qubit in the energy levels of a quantum system. Relaxation and other dissipation processes lead to decay of the fidelity of this stored information. Is it possible to preserve the quantum information for a longer time by introducing a...
Towards Demonstrating Fault Tolerance in Small Circuits Using Bacon-Shor Codes
Ariel Shlosberg, A. Polloreno, Graeme Smith·Aug 4, 2021
Quantum error correction is necessary to perform large-scale quantum computations in the presence of noise and decoherence. As a result, several aspects of quantum error correction have already been explored. These have been primarily studies of quan...
Fault-tolerant operation of a logical qubit in a diamond quantum processor
M. Abobeih, Y. Wang, J. Randall +6 more·Aug 3, 2021
Solid-state spin qubits is a promising platform for quantum computation and quantum networks1,2. Recent experiments have demonstrated high-quality control over multi-qubit systems3–8, elementary quantum algorithms8–11 and non-fault-tolerant error cor...
On-chip scalable highly pure and indistinguishable single-photon sources in ordered arrays: Path to quantum optical circuits
Jiefei Zhang, Swarnabha Chattaraj, Qi Huang +3 more·Aug 3, 2021
Realization of quantum optical circuits is at the heart of quantum photonic information processing. A long-standing obstacle, however, has been the absence of a suitable platform of single photon sources (SPSs). Such SPSs need to be in spatially orde...
Quantum machine learning of large datasets using randomized measurements
T. Haug, C. Self, Myungshik S. Kim·Aug 2, 2021
Quantum computers promise to enhance machine learning for practical applications. Quantum machine learning for real-world data has to handle extensive amounts of high-dimensional data. However, conventional methods for measuring quantum kernels are i...
Performance of Teleportation-Based Error-Correction Circuits for Bosonic Codes with Noisy Measurements
Timo Hillmann, Fernando Quijandr'ia, A. Grimsmo +1 more·Aug 2, 2021
Bosonic quantum error-correcting codes offer a viable direction towards reducing the hardware overhead required for fault-tolerant quantum information processing. A broad class of bosonic codes, namely rotation-symmetric codes, can be characterized b...
Pauli channels can be estimated from syndrome measurements in quantum error correction
Thomas Wagner, H. Kampermann, D. Bruß +1 more·Jul 29, 2021
The performance of quantum error correction can be significantly improved if detailed information about the noise is available, allowing to optimize both codes and decoders. It has been proposed to estimate error rates from the syndrome measurements ...