Papers
Live trends in quantum computing research, updated daily from arXiv.
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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
Prospects and challenges of quantum finance
Adam Bouland, W. V. Dam, Hamed Joorati +2 more·Nov 12, 2020
Quantum computers are expected to have substantial impact on the finance industry, as they will be able to solve certain problems considerably faster than the best known classical algorithms. In this article we describe such potential applications of...
Toward simulating superstring/M-theory on a quantum computer
H. Gharibyan, M. Hanada, Masazumi Honda +1 more·Nov 12, 2020
We present a novel framework for simulating matrix models on a quantum computer. Supersymmetric matrix models have natural applications to superstring/M-theory and gravitational physics, in an appropriate limit of parameters. Furthermore, for certain...
Efficient CNOT Synthesis for NISQ Devices
Yao Tang·Nov 12, 2020
In the era of noisy intermediate-scale quantum (NISQ), executing quantum algorithms on actual quantum devices faces unique challenges. One such challenge is that quantum devices in this era have restricted connectivity: quantum gates are allowed to a...
Quantum Assisted Simulator
Kishor Bharti, T. Haug·Nov 12, 2020
Quantum simulation offers a possibility to explore the exponentially large configuration space of quantum mechanical systems and thus help us study poorly understood topics such as high-temperature superconductivity and drug design. Here, we provide ...
Exponential Error Suppression for Near-Term Quantum Devices
B'alint Koczor·Nov 11, 2020
As quantum computers mature, quantum error correcting codes (QECs) will be adopted in order to suppress errors to any desired level $\mathcal{E}$ at a cost in qubit-count $n$ that is merely poly-logarithmic in $\mathcal{E}^{-1}$. However in the NISQ ...
Analog Quantum Simulation of Non-Condon Effects in Molecular Spectroscopy
Hamza Jnane, Nicolas P. D. Sawaya, B. Peropadre +3 more·Nov 11, 2020
In this work, we present a linear optical implementation for analog quantum simulation of molecular vibronic spectra, incorporating the non-Condon scattering operation with a quadratically small truncation error. Thus far, analog and digital quantum ...
Hybrid Berezinskii-Kosterlitz-Thouless and Ising topological phase transition in the generalized two-dimensional XY model using tensor networks
F. Song, Guang-Ming Zhang·Nov 11, 2020
In tensor network representation, the partition function of a generalized two-dimensional XY spin model with topological integer and half-integer vortex excitations is mapped to a tensor product of one-dimensional quantum transfer operator, whose eig...
Improving the Quantum Approximate Optimization Algorithm with postselection
Sami Boulebnane·Nov 10, 2020
Combinatorial optimization is among the main applications envisioned for near-term and fault-tolerant quantum computers. In this work, we consider a well-studied quantum algorithm for combinatorial optimization: the Quantum Approximate Optimization A...
Laplacian Eigenmaps with variational circuits: a quantum embedding of graph data
Slimane Thabet, J. Hullo·Nov 10, 2020
With the development of quantum algorithms, high-cost computations are being scrutinized in the hope of a quantum advantage. While graphs offer a convenient framework for multiple real-world problems, their analytics still comes with high computation...
Simplified Josephson-junction fabrication process for reproducibly high-performance superconducting qubits
A. Osman, J. Simon, A. Bengtsson +7 more·Nov 10, 2020
We introduce a simplified fabrication technique for Josephson junctions and demonstrate superconducting Xmon qubits with $T_1$ relaxation times averaging above 50$~\mu$s ($Q>$1.5$\times$ 10$^6$). Current shadow-evaporation techniques for aluminum-bas...
Probabilistic teleportation of a quantum dot spin qubit
Y. Kojima, T. Nakajima, A. Noiri +8 more·Nov 10, 2020
Electron spins in semiconductor quantum dots have been intensively studied for implementing quantum computation and high-fidelity single- and two-qubit operations have recently been achieved. Quantum teleportation is a three-qubit protocol exploiting...
Low-Depth Hamiltonian Simulation by an Adaptive Product Formula.
Zi-Jian Zhang, Jinzhao Sun, Xiao Yuan +1 more·Nov 10, 2020
Various Hamiltonian simulation algorithms have been proposed to efficiently study the dynamics of quantum systems on a quantum computer. The existing algorithms generally approximate the time evolution operators, which may need a deep quantum circuit...
Accelerating spiking neural networks using quantum algorithm with high success probability and high calculation accuracy
Yanhu Chen, Cen Wang, Hongxiang Guo +2 more·Nov 10, 2020
Utilizing quantum computers to deploy artificial neural networks (ANNs) will bring the potential of significant advancements in both speed and scale. In this paper, we propose a kind of quantum spike neural networks (SNNs) as well as comprehensively ...
Complexity from the reduced density matrix: a new diagnostic for chaos
Arpan Bhattacharyya, S. S. Haque, Eugene H. Kim·Nov 9, 2020
We investigate circuit complexity to characterize chaos in multiparticle quantum systems. In the process, we take a stride to analyze open quantum systems by using complexity. We propose a new diagnostic of quantum chaos from complexity based on the ...
Highly photon-loss-tolerant quantum computing using hybrid qubits
S. Omkar, Y. S. Teo, Seung-Woo Lee +1 more·Nov 9, 2020
We investigate a scheme for topological quantum computing using optical hybrid qubits and make an extensive comparison with previous all-optical schemes. We show that the photon loss threshold reported by Omkar {\it et al}. [Phys. Rev. Lett. 125, 060...
Focus beyond Quadratic Speedups for Error-Corrected Quantum Advantage
R. Babbush, J. McClean, M. Newman +3 more·Nov 9, 2020
We discuss conditions under which it would be possible for a modest fault-tolerant quantum computer to realize a runtime advantage by executing a quantum algorithm with only a small polynomial speedup over the best classical alternative. The challeng...
Quantum k-means algorithm based on trusted server in quantum cloud computing
Changqing Gong, Z. Dong, A. Gani +1 more·Nov 9, 2020
Quantum k-means algorithm is widely used in solving clustering problems. However, the repeated calculation of the core subroutines overloads the quantum computer with mass computing tasks. In addition, due to the decoherence of the quantum state, the...
Obscure Qubits and Membership Amplitudes
S. Duplij, R. Vogl·Nov 9, 2020
We propose a concept of quantum computing which incorporates an additional kind of uncertainty, i.e. vagueness (fuzziness), in a natural way by introducing new entities, obscure qudits (e.g. obscure qubits), which are characterized simultaneously by ...
Lipkin model on a quantum computer
Michael J. Cervia, A. Balantekin, S. Coppersmith +5 more·Nov 8, 2020
Atomic nuclei are important laboratories for exploring and testing new insights into the universe, such as experiments to directly detect dark matter or explore properties of neutrinos. The targets of interest are often heavy, complex nuclei that cha...
Suppression of Static ZZ Interaction in an All-Transmon Quantum Processor
Peng Zhao, Dong Lan, P. Xu +5 more·Nov 8, 2020
The superconducting transmon qubit is currently a leading qubit modality for quantum computing, but gate performance in quantum processor with transmons is often insufficient to support running complex algorithms for practical applications. It is thu...