Papers
Live trends in quantum computing research, updated daily from arXiv.
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15,673 papers in 12 months (-39% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
A Semiclassical Proof of Duality Between the Classical BSC and the Quantum PSC
Narayanan Rengaswamy, H. Pfister·Mar 16, 2021
In 2018, Renes [IEEE Trans. Inf. Theory, vol. 64, no. 1, pp. 577-592 (2018)] developed a general theory of channel duality for classical-input quantum-output (CQ) channels. That result showed that a number of well-known duality results for linear cod...
Anti-crosstalk high-fidelity state discrimination for superconducting qubits
Zichao Chen, Qi Zhou, P. Duan +3 more·Mar 16, 2021
Zi-Feng Chen, 2 Qi Zhou, 2 Peng Duan, 2 Wei-Cheng Kong, Hai-Feng Zhang, 2 and Guo-Ping Guo 2, 3, ∗ CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, Anhui 230026, China CAS Center for Excellence and Syne...
Counteracting dephasing in Molecular Nanomagnets by optimized qudit encodings
F. Petiziol, A. Chiesa, S. Wimberger +2 more·Mar 16, 2021
Molecular Nanomagnets may enable the implementation of qudit-based quantum error-correction codes which exploit the many spin levels naturally embedded in a single molecule, a promising step towards scalable quantum processors. To fully realize the p...
Analytic Filter-Function Derivatives for Quantum Optimal Control
Isabel Nha Minh Le, J. Teske, Tobias Hangleiter +2 more·Mar 16, 2021
Auto-correlated noise appears in many solid state qubit systems and hence needs to be taken into account when developing gate operations for quantum information processing. However, explicitly simulating this kind of noise is often less efficient than ...
Improving the accuracy and efficiency of quantum connected moments expansions
Daniel Claudino, Bo Peng, Nicholas P. Bauman +2 more·Mar 16, 2021
The still-maturing noisy intermediate-scale quantum technology faces strict limitations on the algorithms that can be implemented efficiently. In the realm of quantum chemistry, the variational quantum eigensolver (VQE) algorithm has become ubiquitou...
Tight Bounds for Inverting Permutations via Compressed Oracle Arguments
A. Rosmanis·Mar 16, 2021
In his seminal work on recording quantum queries [Crypto 2019], Zhandry studied interactions between quantum query algorithms and the quantum oracle corresponding to random functions. Zhandry presented a framework for interpreting various states in t...
HighDist Framework: Algorithms and Applications
Debajyoti Bera, Tharrmashastha Sapv·Mar 16, 2021
We introduce the problem of determining if the mode of the output distribution of a quantum circuit (given as a black-box) is larger than a given threshold, named HighDist, and a similar problem based on the absolute values of the amplitudes, named H...
Faster quantum concentration via Grover's search
Cem M. Unsal, Yavuz Oruç·Mar 16, 2021
ABSTRACT One of the most important challenges in information networks is to gather data from a larger set of nodes to a smaller set of nodes. This can be done via the use of a concentrator architecture in the connection topology. This paper is a proo...
Variational Quantum Algorithms for Euclidean Discrepancy and Covariate-Balancing
J. Lebl, Asif Shakeel·Mar 16, 2021
Algorithmic discrepancy theory seeks efficient algorithms to find those two-colorings of a set that minimize a given measure of coloring imbalance in the set, its {\it discrepancy}. The {\it Euclidean discrepancy} problem and the problem of balancing...
Quantum algorithms for powering stable Hermitian matrices
G. Gonz'alez, Rahul Trivedi, J. Cirac·Mar 15, 2021
Matrix powering is a fundamental computational primitive in linear algebra. It has widespread applications in scientific computing and engineering, and underlies the solution of time-homogeneous linear ordinary differential equations, simulation of d...
Simultaneous Perturbation Stochastic Approximation of the Quantum Fisher Information
Julien Gacon, Christa Zoufal, Giuseppe Carleo +1 more·Mar 15, 2021
The Quantum Fisher Information matrix (QFIM) is a central metric in promising algorithms, such as Quantum Natural Gradient Descent and Variational Quantum Imaginary Time Evolution. Computing the full QFIM for a model with d parameters, however, is co...
Efficient Construction of Functional Representations for Quantum Algorithms
Lukas Burgholzer, Rudy Raymond, I. Sengupta +1 more·Mar 15, 2021
. Due to the significant progress made in the implementation of quantum hardware, efficient methods and tools to design corresponding algorithms become increasingly important. Many of these tools rely on functional representations of certain building bl...
Fabrication of superconducting through-silicon vias
J. Mallek, D. Yost, D. Rosenberg +15 more·Mar 15, 2021
Increasing circuit complexity within quantum systems based on superconducting qubits necessitates high connectivity while retaining qubit coherence. Classical micro-electronic systems have addressed interconnect density challenges by using 3D integra...
Hardware-efficient error-correcting codes for large nuclear spins
J. Gross, Clément Godfrin, A. Blais +1 more·Mar 15, 2021
Universal quantum computers require a large network of qubits robust against errors. Recent theoretical and experimental studies on donor nuclear spins in silicon, engineered on semiconductor platforms compatible with industrial fabrication, show the...
Feedback-Based Quantum Optimization.
Alicia B. Magann, K. Rudinger, Matthew D. Grace +1 more·Mar 15, 2021
It is hoped that quantum computers will offer advantages over classical computers for combinatorial optimization. Here, we introduce a feedback-based strategy for quantum optimization, where the results of qubit measurements are used to constructivel...
Mitigating Depolarizing Noise on Quantum Computers with Noise-Estimation Circuits.
M. Urbánek, B. Nachman, V. Pascuzzi +3 more·Mar 15, 2021
A significant problem for current quantum computers is noise. While there are many distinct noise channels, the depolarizing noise model often appropriately describes average noise for large circuits involving many qubits and gates. We present a meth...
FLIP: A flexible initializer for arbitrarily-sized parametrized quantum circuits
F. Sauvage, Sukin Sim, A. Kunitsa +3 more·Mar 15, 2021
When compared to fault-tolerant quantum computational strategies, variational quantum algorithms stand as one of the candidates with the potential of achieving quantum advantage for real-world applications in the near term. However, the optimization ...
VQE method: a short survey and recent developments
D. Fedorov, Bo Peng, N. Govind +1 more·Mar 15, 2021
The variational quantum eigensolver (VQE) is a method that uses a hybrid quantum-classical computational approach to find eigenvalues of a Hamiltonian. VQE has been proposed as an alternative to fully quantum algorithms such as quantum phase estimati...
Millisecond Coherence in a Superconducting Qubit.
A. Somoroff, Q. Ficheux, R. Mencia +3 more·Mar 15, 2021
Improving control over physical qubits is a crucial component of quantum computing research. Here we report a superconducting fluxonium qubit with uncorrected coherence time T_{2}^{*}=1.48±0.13 ms, exceeding the state of the art for transmons by an ...
Application of the Diamond Gate in Quantum Fourier Transformations and Quantum Machine Learning
E. Bahnsen, S. E. Rasmussen, N. Loft +1 more·Mar 15, 2021
As we are approaching actual application of quantum technology, it is essential to exploit the current quantum resources in the best possible way. With this in mind, it might not be beneficial to use the usual standard gate sets, inspired from classi...