Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Quantum geometric machine learning for quantum circuits and control
Elija Perrier, D. Tao, C. Ferrie·Jun 19, 2020
The application of machine learning techniques to solve problems in quantum control together with established geometric methods for solving optimisation problems leads naturally to an exploration of how machine learning approaches can be used to enha...
Shallow-circuit variational quantum eigensolver based on symmetry-inspired Hilbert space partitioning for quantum chemical calculations
Feng Zhang, N. Gomes, Noah F. Berthusen +4 more·Jun 19, 2020
Development of resource-friendly quantum algorithms remains highly desirable for noisy intermediate-scale quantum computing. Based on the variational quantum eigensolver (VQE) with unitary coupled cluster ansatz, we demonstrate that partitioning of t...
Process tomography of robust dynamical decoupling with superconducting qubits
A. M. Souza·Jun 18, 2020
Dynamical decoupling is a technique that protects qubits against noise. The ability to preserve quantum coherence in the presence of noise is essential for developing quantum devices. Here, the Rigetti quantum computing platform was used to test diff...
Demonstration of an All-Microwave Controlled-Phase Gate between Far-Detuned Qubits
Sebastian Krinner, P. Kurpiers, B. Royer +9 more·Jun 18, 2020
A challenge in building large-scale superconducting quantum processors is to find the right balance between coherence, qubit addressability, qubit-qubit coupling strength, circuit complexity and the number of required control lines. Leading all-micro...
Canonical Construction of Quantum Oracles
Austin Gilliam, Marco Pistoia, Constantin Gonciulea·Jun 18, 2020
Selecting a set of basis states is a common task in quantum computing, in order to increase and/or evaluate their probabilities. This is similar to designing WHERE clauses in classical database queries. Even though one can find heuristic methods to a...
Quantum algorithm for training nonlinear SVMs in almost linear time
J. Allcock, Chang-Yu Hsieh·Jun 18, 2020
We propose a quantum algorithm for training nonlinear support vector machines (SVM) for feature space learning where classical input data is encoded in the amplitudes of quantum states. Based on the classical algorithm of Joachims, our algorithm has ...
Superconducting quantum computing: a review
Heliang Huang, Dachao Wu, D. Fan +1 more·Jun 18, 2020
Over the last two decades, tremendous advances have been made for constructing large-scale quantum computers. In particular, quantum computing platforms based on superconducting qubits have become the leading candidate for scalable quantum processor ...
Entanglement transition in the projective transverse field Ising model
Nicolai Lang, H. Büchler·Jun 17, 2020
Discrete quantum trajectories of systems under random unitary gates and projective measurements have been shown to feature transitions in the entanglement scaling that are not encoded in the density matrix. In this paper, we study the projective tran...
Probabilistic nonunitary gate in imaginary time evolution
Tongqi Liu, Jin-Guo Liu, H. Fan·Jun 17, 2020
Simulation of quantum materials is a significant application of quantum computers. In contrast with the unitary operation which can be realized naturally on a quantum computer, the implementation of nonunitary operation, widely used in classical appr...
What are the prospects of using Grover's search in NISQ era?
Yulun Wang, P. Krstic·Jun 17, 2020
In order to understand the bounds of utilization of the Grover's search algorithm for the large unstructured data in presence of the quantum computer noise, we undertake a series of simulations by inflicting various types of noise, modelled by the IB...
Accelerated variational algorithms for digital quantum simulation of many-body ground states
Chufan Lyu, V. Montenegro, A. Bayat·Jun 16, 2020
One of the key applications for the emerging quantum simulators is to emulate the ground state of many-body systems, as it is of great interest in various fields from condensed matter physics to material science. Traditionally, in an analog sense, ad...
Fast correlated-photon imaging enhanced by deep learning
Zhanming Li, Shi-Bao Wu, Jun Gao +5 more·Jun 16, 2020
Correlated photon pairs, carrying strong quantum correlations, have been harnessed to bring quantum advantages to various fields from biological imaging to range finding. Such inherent non-classical properties support extracting more valid signals to...
Nonadiabatic Molecular Quantum Dynamics with Quantum Computers.
Pauline J. Ollitrault, G. Mazzola, I. Tavernelli·Jun 16, 2020
The theoretical investigation of nonadiabatic processes is hampered by the complexity of the coupled electron-nuclear dynamics beyond the Born-Oppenheimer approximation. Classically, the simulation of such reactions is limited by the unfavorable scal...
Quantum simulation and circuit design for solving multidimensional Poisson equations
M. Holzmann, H. Koestler·Jun 16, 2020
Many methods solve Poisson equations by using grid techniques which discretize the problem in each dimension. Most of these algorithms are subject to the curse of dimensionality, so that they need exponential runtime. In the paper "Quantum algorithm ...
QED driven QAOA for network-flow optimization
Yuxuan Zhang, Ruizhe Zhang, A. Potter·Jun 16, 2020
We present a general framework for modifying quantum approximate optimization algorithms (QAOA) to solve constrained network flow problems. By exploiting an analogy between flow-constraints and Gauss' law for electromagnetism, we design lattice quant...
Three-state quantum walk on the Cayley Graph of the Dihedral Group
Y. Liu, Jiabin Yuan, Wenjing Dai +1 more·Jun 16, 2020
The finite dihedral group generated by one rotation and one reflection is the simplest case of the non-abelian group. Cayley graphs are diagrammatic counterparts of groups. In this paper, much attention is given to the Cayley graph of the dihedral gr...
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...
A dissymmetric [Gd2] coordination molecular dimer hosting six addressable spin qubits
F. Luis, P. Alonso, O. Roubeau +6 more·Jun 15, 2020
Artificial magnetic molecules can host several spin qubits, which could then implement small-scale algorithms. In order to become of practical use, such molecular spin processors need to increase the available computational space and warrant universa...
Resource-Efficient Quantum Computing by Breaking Abstractions
Yunong Shi, P. Gokhale, Prakash Murali +11 more·Jun 15, 2020
Building a quantum computer that surpasses the computational power of its classical counterpart is a great engineering challenge. Quantum software optimizations can provide an accelerated pathway to the first generation of quantum computing (QC) appl...
Blind quantum computation for a user who only performs single-qubit gates
Qin Li, Chengdong Liu, Yu Peng +2 more·Jun 14, 2020
Blind quantum computation (BQC) allows a user who has limited quantum capability to complete a quantum computational task with the aid of a remote quantum server, such that the user's input, output, and even the algorithm can be kept hidden from the ...