Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Voltage-Tunable Superconducting Resonators: A Platform for Random Access Quantum Memory
K. Sardashti, M. Dartiailh, Joseph O. Yuan +3 more·Jun 15, 2020
In computing architectures, one important factor is the tradeoff between the need to couple bits of information (quantum or classical) to each other and to an external drive and the need to isolate them well enough in order to protect the information...
Coherent Ising machines—Quantum optics and neural network Perspectives
Yoshihisa Yamamoto, T. Leleu, S. Ganguli +1 more·Jun 10, 2020
A coherent Ising machine (CIM) is a network of optical parametric oscillators (OPOs), in which the “strongest” collective mode of oscillation at well above threshold corresponds to an optimum solution of a given Ising problem. When a pump rate or net...
The bitter truth about gate-based quantum algorithms in the NISQ era
F. Leymann, Johanna Barzen·Jun 4, 2020
Implementing a gate-based quantum algorithm on an noisy intermediate scale quantum (NISQ) device has several challenges that arise from the fact that such devices are noisy and have limited quantum resources. Thus, various factors contributing to the...
Experimental demonstration of a quantum generative adversarial network for continuous distributions
A. Anand, J. Romero, M. Degroote +1 more·Jun 2, 2020
The potential advantage of machine learning in quantum computers is a topic of intense discussion in the literature. Theoretical, numerical and experimental explorations will most likely be required to understand its power. There has been different a...
Application-Motivated, Holistic Benchmarking of a Full Quantum Computing Stack
Daniel Mills, Seyon Sivarajah, Travis L. Scholten +1 more·Jun 1, 2020
Quantum computing systems need to be benchmarked in terms of practical tasks they would be expected to do. Here, we propose 3 "application-motivated" circuit classes for benchmarking: deep (relevant for state preparation in the variational quantum ei...
Efficient quantum circuits for quantum computational chemistry
Y. Yordanov, D. Arvidsson-Shukur, C. Barnes·May 29, 2020
The VQE (variational quantum eigensolver) is a hybrid classical-quantum algorithm that can determine the energy eigenvalues of molecules by solving the electronic structure problem. Compared to other purely quantum algorithms, the VQE requires shallo...
Preliminary demonstration of a persistent Josephson phase-slip memory cell with topological protection
N. Ligato, E. Strambini, F. Paolucci +1 more·May 28, 2020
Superconducting computing promises enhanced computational power in both classical and quantum approaches. Yet, scalable and fast superconducting memories are not implemented. Here, we propose a fully superconducting memory cell based on the hystereti...
Architecture and noise analysis of continuous-variable quantum gates using two-dimensional cluster states
M. V. Larsen, Jonas S Neergaard-Nielsen, U. Andersen·May 27, 2020
Due to its unique scalability potential, continuous variable quantum optics is a promising platform for large scale quantum computing and quantum simulation. In particular, very large cluster states with a two-dimensional topology that are suitable f...
Noise Mitigation with Delay Pulses in the IBM Quantum Experience
Sam Tomkins, R. D. Sousa·May 26, 2020
One of the greatest challenges for current quantum computing hardware is how to obtain reliable results from noisy devices. A recent paper [A. Kandala et al., Nature 567, 491 (2019)] described a method for injecting noise by stretching gate times, en...
Quantum Divide and Compute: Hardware Demonstrations and Noisy Simulations
T. Ayral, François-Marie Le Régent, Zain Saleem +2 more·May 26, 2020
Noisy, intermediate-scale quantum computers comewith intrinsic limitations in terms of the number of qubits (circuit "width") and decoherence time (circuit "depth") they can have. Here, for the first time, we demonstrate a recently introduced method ...
New perspectives on covariant quantum error correction
Sisi Zhou, Zi-Wen Liu, Liang Jiang·May 25, 2020
Covariant codes are quantum codes such that a symmetry transformation on the logical system could be realized by a symmetry transformation on the physical system, usually with limited capability of performing quantum error correction (an important ca...
Fault-tolerant quantum speedup from constant depth quantum circuits
R. Mezher, J. Ghalbouni, J. Dgheim +1 more·May 23, 2020
A defining feature in the field of quantum computing is the potential of a quantum device to outperform its classical counterpart for a specific computational task. By now, several proposals exist showing that certain sampling problems can be done ef...
Complexity of Fermionic Dissipative Interactions and Applications to Quantum Computing
O. Shtanko, A. Deshpande, P. Julienne +1 more·May 21, 2020
Interactions between particles are usually a resource for quantum computing, making quantum many-body systems intractable by any known classical algorithm. In contrast, noise is typically considered as being inimical to quantum many-body correlations...
Adiabatic evolution on a spatial-photonic Ising machine
D. Pierangeli, G. Marcucci, C. Conti·May 18, 2020
Combinatorial optimization problems are crucial for widespread applications but remain difficult to solve on a large scale with conventional hardware. Novel optical platforms, known as coherent or photonic Ising machines, are attracting considerable ...
Learning-Based Quantum Error Mitigation
Armands Strikis, Dayue Qin, Yanzhu Chen +2 more·May 15, 2020
If NISQ-era quantum computers are to perform useful tasks, they will need to employ powerful error mitigation techniques. Quasi-probability methods can permit perfect error compensation at the cost of additional circuit executions, provided that the ...
Simulating the fabrication of aluminium oxide tunnel junctions
M. Cyster, J. S. Smith, N. Vogt +3 more·May 14, 2020
Aluminium oxide (AlO x ) tunnel junctions are important components in a range of nanoelectric devices including superconducting qubits where they can be used as Josephson junctions. While many improvements in the reproducibility and reliability of qu...
Realistic simulation of quantum computation using unitary and measurement channels
Ahmed Abid Moueddene, N. Khammassi, K. Bertels +1 more·May 13, 2020
The implementation and practicality of quantum algorithms hinge largely on the quality of operations within a quantum processor. Therefore, including realistic error models in quantum computing simulation platforms is crucial for testing these algori...
Benchmarking the noise sensitivity of different parametric two-qubit gates in a single superconducting quantum computing platform
M. Ganzhorn, G. Salis, D. Egger +8 more·May 12, 2020
The possibility to utilize different types of two-qubit gates on a single quantum computing platform adds flexibility in the decomposition of quantum algorithms. A larger hardware-native gate set may decrease the number of required gates, provided th...
Error analysis of bit-flip qubits under random telegraph noise for low and high temperature measurement application
Winston W. Wang, S. Prabhakar·May 12, 2020
Achieving small error for qubit gate operations under random telegraph noise (RTN) is of great interest for potential applications in quantum computing and quantum error correction. I calculate the error generated in the qubit driven by $\pi$, CORPSE...
Measurement Cost of Metric-Aware Variational Quantum Algorithms
Barnaby van Straaten, Bálint Koczor·May 11, 2020
Variational quantum algorithms are promising tools for near-term quantum computers as their shallow circuits are robust to experimental imperfections. Their practical applicability, however, strongly depends on how many times their circuits need to b...