Papers
Live trends in quantum computing research, updated daily from arXiv.
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31,611
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Research Volume
15,669 papers in 12 months (-39% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Universal Quantum Computing Using Electronuclear Wavefunctions of Rare-Earth Ions
M. Grimm, A. Beckert, G. Aeppli +1 more·Sep 29, 2020
We propose a scheme for universal quantum computing based on Kramers rare-earth ions. Their nuclear spins in the presence of a Zeeman-split electronic crystal field ground state act as 'passive' qubits which store quantum information. The qubits can ...
High-fidelity single-shot readout of single electron spin in diamond with spin-to-charge conversion
Qi Zhang, Yuhang Guo, Wentao Ji +8 more·Sep 29, 2020
High fidelity single-shot readout of qubits is a crucial component for fault-tolerant quantum computing and scalable quantum networks. In recent years, the nitrogen-vacancy (NV) center in diamond has risen as a leading platform for the above applicat...
CMOS-based cryogenic control of silicon quantum circuits
X. Xue, B. Patra, Jeroen P. G. van Dijk +21 more·Sep 29, 2020
The most promising quantum algorithms require quantum processors that host millions of quantum bits when targeting practical applications1. A key challenge towards large-scale quantum computation is the interconnect complexity. In current solid-state...
Preparation of excited states for nuclear dynamics on a quantum computer
A. Roggero, C. Gu, A. Baroni +1 more·Sep 28, 2020
We study two different methods to prepare excited states on a quantum computer, a key initial step to study dynamics within linear response theory. The first method uses unitary evolution for a short time $T=\mathcal{O}(\sqrt{1-F})$ to approximate th...
Meta-Variational Quantum Eigensolver: Learning Energy Profiles of Parameterized Hamiltonians for Quantum Simulation
Alba Cervera-Lierta, Jakob S. Kottmann, Alán Aspuru-Guzik·Sep 28, 2020
We present the meta-VQE, an algorithm capable to learn the ground state energy profile of a parametrized Hamiltonian. By training the meta-VQE with a few data points, it delivers an initial circuit parametrization that can be used to compute the grou...
Quantum computed moments correction to variational estimates
H. J. Vallury, Michael Jones, C. Hill +1 more·Sep 28, 2020
The variational principle of quantum mechanics is the backbone of hybrid quantum computing for a range of applications. However, as the problem size grows, quantum logic errors and the effect of barren plateaus overwhelm the quality of the results. T...
High Fidelity Entangling Gates in a 3D Ion Crystal under Micromotion
Y. Wu, Z.-D. Liu, W.-D. Zhao +1 more·Sep 28, 2020
Ion trap is one of the most promising candidates for quantum computing. Current schemes mainly focus on a linear chain of up to about one hundred ions in a Paul trap. To further scale up the qubit number, one possible direction is to use 2D or 3D ion...
Quantum computing: A taxonomy, systematic review and future directions
S. Gill, Adarsh Kumar, Harvinder Singh +4 more·Sep 28, 2020
Quantum computing (QC) is an emerging paradigm with the potential to offer significant computational advantage over conventional classical computing by exploiting quantum‐mechanical principles such as entanglement and superposition. It is anticipated...
The relationship between costs for quantum error mitigation and non-Markovian measures
H. Hakoshima, Y. Matsuzaki, Suguru Endo·Sep 27, 2020
Quantum error mitigation (QEM) has been proposed as an alternative method of quantum error correction (QEC) to compensate errors in quantum systems without qubit overhead. While Markovian gate errors on digital quantum computers are mainly considered...
Squeezed comb states
N. Shukla, S. Nimmrichter, B. Sanders·Sep 27, 2020
Continuous-variable codes are an expedient solution for quantum information processing and quantum communication involving optical networks. Here we characterize the squeezed comb, a finite superposition of equidistant squeezed coherent states on a l...
Sparse-Hamiltonian approach to the time-evolution of molecules on quantum computers
Christina Daniel, Diksha Dhawan, D. Zgid +1 more·Sep 26, 2020
Quantum chemistry has been viewed as one of the potential early applications of quantum computing. Two techniques have been proposed for electronic structure calculations: (1) the variational quantum eigensolver and (2) the phase-estimation algorithm...
Performance benefits of increased qubit connectivity in quantum annealing 3-dimensional spin glasses.
A. King, William Bernoudy·Sep 26, 2020
An important challenge in superconducting quantum computing is the need to physically couple many devices using quasi-two-dimensional fabrication processes. Recent advances in the design and fabrication of quantum annealing processors have enabled an...
The hybrid topological longitudinal transmon qubit
Alec Dinerstein, Caroline S. Gorham, E. Dumitrescu·Sep 25, 2020
We introduce a new hybrid qubit consisting of a Majorana qubit interacting with a transmon longitudinally coupled to a resonator. To do so, we equip the longitudinal transmon qubit with topological quasiparticles, supported by an array of heterostruc...
How will quantum computers provide an industrially relevant computational advantage in quantum chemistry
V. Elfving, B. W. Broer, M. Webber +4 more·Sep 25, 2020
Numerous reports claim that quantum advantage, which should emerge as a direct consequence of the advent of quantum computers, will herald a new era of chemical research because it will enable scientists to perform the kinds of quantum chemical simul...
The modified logarithmic Sobolev inequality for quantum spin systems: classical and commuting nearest neighbour interactions
'Angela Capel, Cambyse Rouz'e, Daniel Stilck Francca·Sep 24, 2020
Given a uniform, frustration-free family of local Lindbladians defined on a quantum lattice spin system in any spatial dimension, we prove a strong exponential convergence in relative entropy of the system to equilibrium under a condition of spatial ...
Fault-Tolerant Operation of a Quantum Error-Correction Code
L. Egan, D. Debroy, C. Noel +8 more·Sep 24, 2020
Quantum error correction protects fragile quantum information by encoding it in a larger quantum system whose extra degrees of freedom enable the detection and correction of errors. An encoded logical qubit thus carries increased complexity compared ...
Efficient sampling from shallow Gaussian quantum-optical circuits with local interactions
H. Qi, Diego Cifuentes, K. Br'adler +3 more·Sep 24, 2020
We prove that a classical computer can efficiently sample from the photon-number probability distribution of a Gaussian state prepared by using an optical circuit that is shallow and local. Our work generalizes previous known results for qubits to th...
Single-Shot Error Correction of Three-Dimensional Homological Product Codes
A. O. Quintavalle, M. Vasmer, Joschka Roffe +1 more·Sep 24, 2020
Single-shot error correction corrects data noise using only a single round of noisy measurements on the data qubits, removing the need for intensive measurement repetition. We introduce a general concept of confinement for quantum codes, which roughl...
Search for efficient formulations for Hamiltonian simulation of non-Abelian lattice gauge theories
Z. Davoudi, Indrakshi Raychowdhury, A. Shaw·Sep 24, 2020
Hamiltonian formulation of lattice gauge theories (LGTs) is the most natural framework for the purpose of quantum simulation, an area of research that is growing with advances in quantum-computing algorithms and hardware. It, therefore, remains an im...
Integer Programming from Quantum Annealing and Open Quantum Systems
Chia-Cheng Chang, Chih-Chieh Chen, C. Koerber +2 more·Sep 24, 2020
While quantum computing proposes promising solutions to computational problems not accessible with classical approaches, due to current hardware constraints, most quantum algorithms are not yet capable of computing systems of practical relevance, and...