Papers
Live trends in quantum computing research, updated daily from arXiv.
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13,033 papers in 12 months (-2% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Suppressing ZZ crosstalk of Quantum computers through pulse and scheduling co-optimization
Lei Xie, Jidong Zhai, Zhenxing Zhang +3 more·Feb 15, 2022
Noise is a significant obstacle to quantum computing, and ZZ crosstalk is one of the most destructive types of noise affecting superconducting qubits. Previous approaches to suppressing ZZ crosstalk have mainly relied on specific chip design that can...
Wasserstein Solution Quality and the Quantum Approximate Optimization Algorithm: A Portfolio Optimization Case Study
J. Baker, Santosh Kumar Radha·Feb 14, 2022
Optimizing of a portfolio of financial assets is a critical industrial problem which can be approximately solved using algorithms suitable for quantum processing units (QPUs). We benchmark the success of this approach using the Quantum Approximate Op...
Assessing the quality of near-term photonic quantum devices
R. Mezher, Shane Mansfield·Feb 9, 2022
For near-term quantum devices, an important challenge is to develop efficient methods to certify that noise levels are low enough to allow potentially useful applications to be carried out. We present such a method tailored to photonic quantum device...
QAC: Quantum-computing Aided Composition
Omar Costa Hamido·Feb 9, 2022
In this chapter I will discuss the role of quantum computing in computer music and how it can be integrated to better serve the creative artists. I will start by considering different approaches in current computer music and quantum computing tools, ...
Markovian noise modelling and parameter extraction framework for quantum devices
D. Brand, I. Sinayskiy, Francesco Petruccione·Feb 9, 2022
In recent years, Noisy Intermediate Scale Quantum (NISQ) computers have been widely used as a test bed for quantum dynamics. This work provides a new hardware-agnostic framework for modelling the Markovian noise and dynamics of quantum systems in ben...
Devitalizing noise-driven instability of entangling logic in silicon devices with bias controls
H. Ryu, J. Kang·Feb 9, 2022
The quality of quantum bits (qubits) in silicon is highly vulnerable to charge noise that is omnipresent in semiconductor devices and is in principle hard to be suppressed. For a realistically sized quantum dot system based on a silicon-germanium het...
SpinQ Triangulum: A commercial three-qubit desktop quantum computer
Guanru Feng, Shin-Yao Hou, Hongyan Zhou +10 more·Feb 7, 2022
SpinQ Triangulum is the second generation of the desktop quantum computers designed and manufactured by SpinQ Technology. SpinQ’s desktop quantum computer series, based on a room-temperature nuclear magnetic resonance (NMR) spectrometer, provides lig...
An Empirical Review of Optimization Techniques for Quantum Variational Circuits
Owen Lockwood·Feb 3, 2022
Quantum Variational Circuits (QVCs) are often claimed as one of the most potent uses of both near term and long term quantum hardware. The standard approaches to optimizing these circuits rely on a classical system to compute the new parameters at ev...
Characterizing the Reproducibility of Noisy Quantum Circuits
S. Dasgupta, T. Humble·Feb 1, 2022
The ability of a quantum computer to reproduce or replicate the results of a quantum circuit is a key concern for verifying and validating applications of quantum computing. Statistical variations in circuit outcomes that arise from ill-characterized...
Quantum thermodynamic methods to purify a qubit on a quantum processing unit
Andrea Solfanelli, Alessandro Santini, M. Campisi·Jan 31, 2022
We report on a quantum thermodynamic method to purify a qubit on a quantum processing unit (QPU) equipped with (nearly) identical qubits. Our starting point is a three qubit design that emulates the well-known two qubit swap engine. Similar to standa...
Quantum algorithms for Schrieffer-Wolff transformation
Zongkang Zhang, Yongdan Yang, Xiaosi Xu +1 more·Jan 31, 2022
The Schrieffer-Wolff transformation aims to solve degenerate perturbation problems and give an effective Hamiltonian that describes the low-energy dynamics of the exact Hamiltonian in the low-energy subspace of unperturbed Hamiltonian. This unitary t...
Quantum Simulation of Dissipative Collective Effects on Noisy Quantum Computers
M. Cattaneo, M. Rossi, Guillermo Garc'ia-P'erez +2 more·Jan 27, 2022
Dissipative collective effects are ubiquitous in quantum physics, and their relevance ranges from the study of entanglement in biological systems to noise mitigation in quantum computers. Here, we put forward the first fully quantum simulation of dis...
Self-correcting quantum many-body control using reinforcement learning with tensor networks
F. Metz, M. Bukov·Jan 27, 2022
Quantum many-body control is a central milestone en route to harnessing quantum technologies. However, the exponential growth of the Hilbert space dimension with the number of qubits makes it challenging to classically simulate quantum many-body syst...
Efficient quantum readout-error mitigation for sparse measurement outcomes of near-term quantum devices
Bo-Jhang Yang, Rudy Raymond, Shumpei Uno·Jan 26, 2022
The readout error on near-term quantum devices is one of the dominant noise factors, which can be mitigated by classical postprocessing called quantum readout error mitigation (QREM). The standard QREM applies the inverse of noise calibration matrix ...
Learning noise via dynamical decoupling of entangled qubits
T. McCourt, C. Neill, Kenny Lee +9 more·Jan 26, 2022
Noise in entangled quantum systems is difficult to characterize due to many-body effects involving multiple degrees of freedom. This noise poses a challenge to quantum computing, where two-qubit gate performance is critical. Here, we develop and appl...
Efficiently improving the performance of noisy quantum computers
Samuele Ferracin, A. Hashim, J. Ville +7 more·Jan 25, 2022
Using near-term quantum computers to achieve a quantum advantage requires efficient strategies to improve the performance of the noisy quantum devices presently available. We develop and experimentally validate two efficient error mitigation protocol...
Entanglement Purification and Protection in a Superconducting Quantum Network.
Haoxiong Yan, Y. Zhong, Hung-Shen Chang +7 more·Jan 25, 2022
High-fidelity quantum entanglement is a key resource for quantum communication and distributed quantum computing, enabling quantum state teleportation, dense coding, and quantum encryption. Any sources of decoherence in the communication channel, how...
Probabilistic error cancellation with sparse Pauli–Lindblad models on noisy quantum processors
Ewout van den Berg, Z. Minev, A. Kandala +1 more·Jan 24, 2022
Noise in quantum computers can result in biased estimates of physical observables. Accurate bias-free estimates can be obtained using probabilistic error cancellation, an error-mitigation technique that effectively inverts well-characterized noise ch...
Quantum error correction with silicon spin qubits
K. Takeda, A. Noiri, T. Nakajima +2 more·Jan 21, 2022
Future large-scale quantum computers will rely on quantum error correction (QEC) to protect the fragile quantum information during computation1,2. Among the possible candidate platforms for realizing quantum computing devices, the compatibility with ...
Modeling Short-Range Microwave Networks to Scale Superconducting Quantum Computation
Nicholas Laracuente, Kaitlin N. Smith, Poolad Imany +2 more·Jan 21, 2022
A core challenge for superconducting quantum computers is to scale up the number of qubits in each processor without increasing noise or cross-talk. Distributed quantum computing across small qubit arrays, known as chiplets, can address these challen...