Papers
Live trends in quantum computing research, updated daily from arXiv.
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31,611
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15,669 papers in 12 months (-39% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Maximal Entropy Approach for Quantum State Tomography
Rishabh Gupta, Rongxin Xia, R. Levine +1 more·Sep 2, 2020
Quantum computation has been growing rapidly in both theory and experiments. In particular, quantum computing devices with a large number of qubits have been developed by IBM, Google, IonQ, and others. The current quantum computing devices are noisy ...
Universal Approximation Property of Quantum Machine Learning Models in Quantum-Enhanced Feature Spaces.
Takahiro Goto, Q. Tran, K. Nakajima·Sep 1, 2020
Encoding classical data into quantum states is considered a quantum feature map to map classical data into a quantum Hilbert space. This feature map provides opportunities to incorporate quantum advantages into machine learning algorithms to be perfo...
Quantum search for scaled hash function preimages
Sergi Ramos-Calderer, E. Bellini, J. Latorre +2 more·Sep 1, 2020
We present the implementation of Grover’s algorithm in a quantum simulator to perform a quantum search for preimages of two scaled hash functions, whose design only uses modular addition, word rotation and bitwise exclusive or. Our implementation pro...
On the origin of the controversial electrostatic field effect in superconductors
Ilia Golokolenov, A. Guthrie, S. Kafanov +2 more·Sep 1, 2020
Superconducting quantum devices offer numerous applications, from electrical metrology and magnetic sensing to energy-efficient high-end computing and advanced quantum information processing. The key elements of quantum circuits are (single and doubl...
Quantum analytic descent
Bálint Koczor, S. Benjamin·Aug 31, 2020
Quantum variational algorithms are applicable to a range of tasks and have particular relevance for near-term quantum computers. The approach involves adjusting the parameterised elements of a quantum circuit to minimise the expected energy of the ou...
Solving the Liouvillian Gap with Artificial Neural Networks.
D. Yuan, He Wang, Zhong Wang +1 more·Aug 31, 2020
We propose a machine-learning inspired variational method to obtain the Liouvillian gap, which plays a crucial role in characterizing the relaxation time and dissipative phase transitions of open quantum systems. By using "spin bi-base mapping," we m...
Neural-network variational quantum algorithm for simulating many-body dynamics
Chee-Kong Lee, P. Patil, Shengyu Zhang +1 more·Aug 31, 2020
We propose a neural-network variational quantum algorithm to simulate the time evolution of quantum many-body systems. Based on a modified restricted Boltzmann machine (RBM) wavefunction ansatz, the proposed algorithm can be efficiently implemented i...
A QUBO Formulation for Qubit Allocation
B. Dury, O. D. Matteo·Aug 31, 2020
To run an algorithm on a quantum computer, one must choose an assignment from logical qubits in a circuit to physical qubits on quantum hardware. This task of initial qubit placement, or qubit allocation, is especially important on present-day quantu...
Quantum information processing with bosonic qubits in circuit QED
Atharv Joshi, Kyungjoo Noh, Yvonne Y Gao·Aug 31, 2020
The unique features of quantum theory offer a powerful new paradigm for information processing. Translating these mathematical abstractions into useful algorithms and applications requires quantum systems with significant complexity and sufficiently ...
Supercomputer simulations of transmon quantum computers
D. Willsch·Aug 31, 2020
We develop a simulator for quantum computers composed of superconducting transmon qubits. The simulation model supports an arbitrary number of transmons and resonators. Quantum gates are implemented by time-dependent pulses. Nontrivial effects such a...
Quantum Solvers for Plane-Wave Hamiltonians: Abridging Virtual Spaces Through the Optimization of Pairwise Correlations
E. Bylaska, D. Song, Nicholas P. Bauman +3 more·Aug 31, 2020
For many-body methods such as MCSCF and CASSCF, in which the number of one-electron orbitals is optimized and independent of the basis set used, there are no problems with using plane-wave basis sets. However, for methods currently used in quantum co...
Arbitrary Measurement on Any Real-valued Probability Amplitude in Any Quantum System
Guanlei Xu·Aug 31, 2020
How to achieve an arbitrary real-valued probability amplitude in the general single-partite or multipartite quantum system without measuring any other quantum state's probability amplitude? How to achieve an arbitrary real-valued probability amplitud...
Resonant Coupling Parameter Estimation with Superconducting Qubits
Jérémy H. Béjanin, C. T. Earnest, Y. Sanders +1 more·Aug 28, 2020
Today's quantum computers are comprised of tens of qubits interacting with each other and the environment in increasingly complex networks. In order to achieve the best possible performance when operating such systems, it is necessary to have accurat...
Trade-Offs on Number and Phase Shift Resilience in Bosonic Quantum Codes
Yingkai Ouyang, E. Campbell·Aug 28, 2020
Quantum codes typically rely on large numbers of degrees of freedom to achieve low error rates. However each additional degree of freedom introduces a new set of error mechanisms. Hence minimizing the degrees of freedom that a quantum code utilizes i...
Quantum error correction and large $N$
A. Milekhin·Aug 28, 2020
In recent years quantum error correction (QEC) has become an important part of AdS/CFT. Unfortunately, there are no field-theoretic arguments about why QEC holds in known holographic systems. The purpose of this paper is to fill this gap by studying ...
Continuous-variable gate teleportation and bosonic-code error correction
B. W. Walshe, B. Baragiola, R. N. Alexander +1 more·Aug 28, 2020
We examine continuous-variable gate teleportation using entangled states made from pure product states sent through a beamsplitter. We show that such states are Choi states for a (typically) non-unitary gate, and we derive the associated Kraus operat...
Finding Small and Large $k$-Clique Instances on a Quantum Computer
Sara Ayman Metwalli, François Le Gall, Rodney Van Meter·Aug 28, 2020
Algorithms for triangle finding, the smallest nontrivial instance of the <inline-formula><tex-math notation="LaTeX">$k$</tex-math></inline-formula>-clique problem, have been proposed for quantum computers. Still, those algorithms assume the use of fi...
Efficient Classical Simulation and Benchmarking of Quantum Processes in the Weyl Basis.
Daniel Stilck França, Sergii Strelchuk, Michał Studziński·Aug 27, 2020
One of the crucial steps in building a scalable quantum computer is to identify the noise sources which lead to errors in the process of quantum evolution. Different implementations come with multiple hardware-dependent sources of noise and decoheren...
Quasi-classical rules for qubit spin-rotation error suppression
Qi Su·Aug 27, 2020
A frequently encountered source of systematic error in quantum computations is imperfections in the control pulses which are the classical fields that control qubit gate operations. From an analysis of the quantum-mechanical time-evolution operator o...
Characterization of exact one-query quantum algorithms (ii): for partial functions
Zekun Ye, Lvzhou Li·Aug 27, 2020
The query model (or black-box model) has attracted much attention from the communities of both classical and quantum computing. Usually, quantum advantages are revealed by presenting a quantum algorithm that has a better query complexity than its cla...