Papers
Live trends in quantum computing research, updated daily from arXiv.
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15,688 papers in 12 months (-39% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Implementation of an advanced dressing protocol for global qubit control in silicon
I. Hansen, A. Seedhouse, K. Chan +6 more·Aug 2, 2021
Quantum computing based on solid state spins allows for densely packed arrays of quantum bits. However, the operation of large-scale quantum processors requires a shift in paradigm toward global control solutions. Here, we report a proof-of-principle...
Quantum collision finding for homomorphic hash functions
J. C. García-Escartín, V. Gimeno, Julio Jos'e Moyano-Fern'andez·Jul 30, 2021
Hash functions are a basic cryptographic primitive. Certain hash functions try to prove security against collision and preimage attacks by reductions to known hard problems. These hash functions usually have some additional properties that allow for ...
On the closedness and geometry of tensor network state sets
T. Barthel, Jianfeng Lu, G. Friesecke·Jul 30, 2021
Tensor network states (TNS) are a powerful approach for the study of strongly correlated quantum matter. The curse of dimensionality is addressed by parametrizing the many-body state in terms of a network of partially contracted tensors. These tensor...
Coherent control of electron spin qubits in silicon using a global field
E. Vahapoglu, J. Slack-Smith, R. Leon +13 more·Jul 30, 2021
Silicon spin qubits promise to leverage the extraordinary progress in silicon nanoelectronic device fabrication over the past half century to deliver large-scale quantum processors. Despite the scalability advantage of using silicon technology, reali...
What can unitary sequences tell us about multi-time physics?
G. White, F. A. Pollock, L. Hollenberg +2 more·Jul 29, 2021
Multi-time quantum processes are endowed with the same richness as multipartite states, including temporal entanglement and exotic causal structures. However, experimentally probing these rich phenomena leans heavily on fast and clean mid-circuit mea...
Performance analysis of a hybrid agent for quantum-accessible reinforcement learning
A. Hamann, S. Wölk·Jul 29, 2021
In the last decade quantum machine learning has provided fascinating and fundamental improvements to supervised, unsupervised and reinforcement learning (RL). In RL, a so-called agent is challenged to solve a task given by some environment. The agent...
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 ...
Natural parametrized quantum circuit
T. Haug, M. Kim·Jul 29, 2021
Noisy intermediate scale quantum computers are useful for various tasks such as state preparation and variational quantum algorithms. However, the non-euclidean quantum geometry of parameterized quantum circuits is detrimental for these applications....
Quantum state preparation protocol for encoding classical data into the amplitudes of a quantum information processing register's wave function
S. Ashhab·Jul 29, 2021
We present a protocol for encoding N real numbers stored in N memory registers into the amplitudes of the quantum superposition that describes the state of log2N qubits. This task is one of the main steps in quantum machine learning algorithms applie...
Improved quantum error correction using soft information
C. Pattison, M. Beverland, M. Silva +1 more·Jul 28, 2021
The typical model for measurement noise in quantum error correction is to randomly flip the binary measurement outcome. In experiments, measurements yield much richer information - e.g., continuous current values, discrete photon counts - which is th...
Quantum Artificial Intelligence for the Science of Climate Change
Manmeet Singh, C. Dhara, Adarsh Kumar +2 more·Jul 28, 2021
Climate change has become one of the biggest global problems increasingly compromising the Earth's habitability. Recent developments such as the extraordinary heat waves in California&Canada, and the devastating floods in Germany point to the role of...
Trade off-free entanglement stabilization in a superconducting qutrit-qubit system
Tristan Brown, Emery Doucet, D. Ristè +7 more·Jul 28, 2021
Quantum reservoir engineering is a powerful framework for autonomous quantum state preparation and error correction. However, traditional approaches to reservoir engineering are hindered by unavoidable coherent leakage out of the target state, which ...
Feature Selection for Recommender Systems with Quantum Computing
Riccardo Nembrini, Maurizio Ferrari Dacrema, P. Cremonesi·Jul 28, 2021
The promise of quantum computing to open new unexplored possibilities in several scientific fields has been long discussed, but until recently the lack of a functional quantum computer has confined this discussion mostly to theoretical algorithmic pa...
Freedom of the mixer rotation axis improves performance in the quantum approximate optimization algorithm
L. Govia, C. Poole, M. Saffman +1 more·Jul 28, 2021
Variational quantum algorithms such as the quantum approximate optimization algorithm (QAOA) are particularly attractive candidates for implementation on near-term quantum processors. As hardware realities such as error and qubit connectivity will co...
Quantum annealing algorithms for Boolean tensor networks
Elijah Pelofske, Georg Hahn, D. O’Malley +2 more·Jul 28, 2021
Quantum annealers manufactured by D-Wave Systems, Inc., are computational devices capable of finding high-quality heuristic solutions of NP-hard problems. In this contribution, we explore the potential and effectiveness of such quantum annealers for ...
Sensing dot with high output swing for scalable baseband readout of spin qubits
E. Kammerloher, A. Schmidbauer, L. Diebel +9 more·Jul 28, 2021
A crucial requirement for quantum computing, in particular for scalable quantum computing and error correction, is a fast and high-fidelity qubit readout. For semiconductor based qubits, one limiting factor for local low-power signal amplification, i...
Quantum computing for classical problems: variational quantum eigensolver for activated processes
Pierpaolo Pravatto, D. Castaldo, Federico Gallina +3 more·Jul 27, 2021
The theory of stochastic processes impacts both physical and social sciences. At the molecular scale, stochastic dynamics is ubiquitous because of thermal fluctuations. The Fokker–Plank–Smoluchowski equation models the time evolution of the probabili...
Strong Coupling Optomechanics Mediated by a Qubit in the Dispersive Regime
Ahmad Shafiei Aporvari, D. Vitali·Jul 27, 2021
Cavity optomechanics represents a flexible platform for the implementation of quantum technologies, useful in particular for the realization of quantum interfaces, quantum sensors and quantum information processing. However, the dispersive, radiation...
Cross-architecture tuning of silicon and SiGe-based quantum devices using machine learning
B. Severin, D. Lennon, L. Camenzind +20 more·Jul 27, 2021
The potential of Si and SiGe-based devices for the scaling of quantum circuits is tainted by device variability. Each device needs to be tuned to operation conditions and each device realisation requires a different tuning protocol. We demonstrate th...
Mitigating noise in digital and digital–analog quantum computation
Paula Garc'ia-Molina, Ana Martin, Mikel Garcia de Andoin +1 more·Jul 27, 2021
Noisy Intermediate-Scale Quantum (NISQ) devices lack error correction, limiting scalability for quantum algorithms. In this context, digital-analog quantum computing (DAQC) offers a more resilient alternative quantum computing paradigm that outperfor...