Papers
Live trends in quantum computing research, updated daily from arXiv.
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28,402
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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
Suppressing Coherent Two-Qubit Errors via Dynamical Decoupling
J. Qiu, Yuxuan Zhou, Changkang Hu +21 more·Apr 6, 2021
Scalable quantum information processing requires the ability to tune multi-qubit interactions. This makes the precise manipulation of quantum states particularly difficult for multi-qubit interactions because tunability unavoidably introduces sensiti...
Hamiltonian singular value transformation and inverse block encoding
S. Lloyd, B. Kiani, D. Arvidsson-Shukur +5 more·Apr 3, 2021
: The quantum singular value transformation is a powerful quantum algorithm that allows one to apply a polynomial transformation to the singular values of a matrix that is embedded as a block of a unitary transformation. This paper shows how to perfo...
Learning to Measure: Adaptive Informationally Complete Generalized Measurements for Quantum Algorithms
Guillermo García-Pérez, M. Rossi, Boris Sokolov +5 more·Apr 1, 2021
Many prominent quantum computing algorithms with applications in fields such as chemistry and materials science require a large number of measurements, which represents an important roadblock for future real-world use cases. We introduce a novel appr...
Modelling Quantum Circuits with UML
Ricardo Pérez-Castillo, Luis Jiménez-Navajas, M. Piattini·Mar 30, 2021
None of the quantum computing applications imagined will ever become a reality without quantum software. Quantum programmes have, to date, been coded with ad hoc techniques. Researchers in the field of quantum software engineering are, therefore, now...
Hybrid light-matter networks of Majorana zero modes
L. Contamin, M. Delbecq, B. Douçot +2 more·Mar 30, 2021
Topological excitations, such as Majorana zero modes, are a promising route for encoding quantum information. Topologically protected gates of Majorana qubits, based on their braiding, will require some form of network. Here, we propose to build such...
Variational quantum algorithm with information sharing
C. Self, K. Khosla, Alistair W. R. Smith +5 more·Mar 30, 2021
We introduce an optimisation method for variational quantum algorithms and experimentally demonstrate a 100-fold improvement in efficiency compared to naive implementations. The effectiveness of our approach is shown by obtaining multi-dimensional en...
Variational quantum algorithms to estimate rank, quantum entropies, fidelity, and Fisher information via purity minimization
K. C. Tan, T. Volkoff·Mar 29, 2021
Variational quantum algorithms (VQAs) that estimate values of widely used physical quantities such as the rank, quantum entropies, the Bures fidelity and the quantum Fisher information of mixed quantum states are developed. In addition, variations of...
ZX-Calculus and Extended Wolfram Model Systems II: Fast Diagrammatic Reasoning with an Application to Quantum Circuit Simplification
Jonathan Gorard, Manojna Namuduri, X. Arsiwalla·Mar 29, 2021
This article presents a novel algorithmic methodology for performing automated diagrammatic deductions over combinatorial structures, using a combination of modified equational theorem-proving techniques and the extended Wolfram model hypergraph rewr...
Fisher Information in Noisy Intermediate-Scale Quantum Applications
Johannes Jakob Meyer·Mar 28, 2021
The recent advent of noisy intermediate-scale quantum devices, especially near-term quantum computers, has sparked extensive research efforts concerned with their possible applications. At the forefront of the considered approaches are variational me...
Epitaxial superconductor-semiconductor two-dimensional systems for superconducting quantum circuits
Joseph O’Connell Yuan, K. Wickramasinghe, W. Strickland +4 more·Mar 26, 2021
Qubits on solid state devices could potentially provide the rapid control necessary for developing scalable quantum information processors. Materials innovation and design breakthroughs have increased functionality and coherence of qubits substantial...
Robust entanglement detection in arbitrary two-mode Gaussian state: a Stokes-like operator-based approach
Arijit Dutta, Sibasish Ghosh, Jaewan Kim +1 more·Mar 24, 2021
Detection of entanglement in quantum states is one of the most important problems in quantum information processing. However, it is one of the most challenging tasks to find a universal scheme which is also desired to be optimal to detect entanglemen...
A staggered gauge-invariant quantum cellular automaton for both the Kogut-Susskind Schwinger model and the Dirac equation
Kevissen Sellapillay, P. Arrighi, G. Molfetta·Mar 24, 2021
We build a quantum cellular automaton (QCA) which coincides with 1+1 QED on its known continuum limits. It consists in a circuit of unitary gates driving the evolution of particles on a one dimensional lattice, and having them interact with the gauge...
Random-Access Quantum Memory Using Chirped Pulse Phase Encoding
James O'Sullivan, O. Kennedy, Kamanasish Debnath +9 more·Mar 22, 2021
As in conventional computing, memories for quantum information benefit from high storage density and, crucially, random access, or the ability to read from or write to an arbitrarily chosen register. However, achieving such random access with quantum...
Circuit quantum electrodynamics (cQED) with modular quasi-lumped models
Z. Minev, T. McConkey, M. Takita +2 more·Mar 18, 2021
Extracting the Hamiltonian of interacting quantum-information processing systems is a keystone problem in the realization of complex phenomena and large-scale quantum computers. The remarkable growth of the field increasingly requires precise, widely...
Quantum Computation and Communication in Bosonic Systems
Kyungjoo Noh·Mar 17, 2021
Quantum computation and communication are important branches of quantum information science. However, noise in realistic quantum devices fundamentally limits the utility of these quantum technologies. A conventional approach towards large-scale and f...
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...
Quantum Algorithm for Fidelity Estimation
Qisheng Wang, Zhicheng Zhang, Kean Chen +4 more·Mar 16, 2021
For two unknown mixed quantum states <inline-formula> <tex-math notation="LaTeX">$\rho $ </tex-math></inline-formula> and <inline-formula> <tex-math notation="LaTeX">$\sigma $ </tex-math></inline-formula> in an <inline-formula> <tex-math notation="La...
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...
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...