Papers
Live trends in quantum computing research, updated daily from arXiv.
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A flux tunable superconducting quantum circuit based on Weyl semimetal MoTe2
K. Chiu, D. Qian, J. Qiu +7 more·Oct 27, 2020
Weyl semimetals for their exotic topological properties have drawn considerable attention in many research fields. When in combination with s-wave superconductors, the supercurrent can be carried by their topological surface channels, forming junctio...
Tensor lattice field theory for renormalization and quantum computing
Y. Meurice, Ryo Sakai, J. Unmuth-Yockey·Oct 13, 2020
We discuss the successes and limitations of statistical sampling for a sequence of models studied in the context of lattice QCD and emphasize the need for new methods to deal with finite-density and real-time evolution. We show that these lattice mod...
Reinforcement Learning for Many-Body Ground-State Preparation Inspired by Counterdiabatic Driving
Jiahao Yao, Lin Lin, Marin Bukov·Oct 7, 2020
The quantum alternating operator ansatz (QAOA) is a prominent example of variational quantum algorithms. We propose a generalized QAOA called CD-QAOA, which is inspired by the counterdiabatic driving procedure, designed for quantum many-body systems ...
Efficient and Robust Certification of Genuine Multipartite Entanglement in Noisy Quantum Error Correction Circuits
A. Rodríguez-Blanco, A. Bermudez, Markus P. Müller +1 more·Oct 6, 2020
Ensuring the correct functioning of quantum error correction (QEC) circuits is crucial to achieve fault tolerance in realistic quantum processors subjected to noise. The first checkpoint for a fully operational QEC circuit is to create genuine multip...
Optimal State Transfer and Entanglement Generation in Power-Law Interacting Systems
Minh C. Tran, Andrew Y. Guo, A. Deshpande +2 more·Oct 6, 2020
We present an optimal protocol for encoding an unknown qubit state into a multiqubit Greenberger-Horne-Zeilinger-like state and, consequently, transferring quantum information in large systems exhibiting power-law (1/rα) interactions. For all power-l...
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...
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...
Quantum teleportation of a spin-mapped Majorana zero mode qubit
Heliang Huang, Marek Narozniak, Futian Liang +13 more·Sep 16, 2020
Quantum error correction is widely considered to be an essential ingredient for overcoming decoherence and achieving large-scale quantum computation. Topological quantum computation based on anyons is a promising approach to achieve fault-tolerant qu...
The quest and hope of Majorana zero modes in topological superconductor for fault-tolerant quantum computing: An introductory overview
N. R. Ayukaryana, M. H. Fauzi, E. Hasdeo·Sep 16, 2020
Ettore Majorana, in his short life, unintendedly has uncovered the most profound problem in quantum computation by his discovery of Majorana fermion, a particle which is its own anti-particle. Owing to its non-Abelian exchange statistics, Majorana fe...
Nonlinear quantum search via coined quantum walks
Basile Herzog, G. Molfetta·Sep 16, 2020
We provide first evidence that some families of nonlinear quantum systems, rephrased in terms of coined quantum walks with effective nonlinear phase, display a strong computational advantage for search algorithms, over graphs having sets of vertices ...
Fibonacci Anyons Versus Majorana Fermions: A Monte Carlo Approach to the Compilation of Braid Circuits in SU(2)k Anyon Models
Emil Génetay Johansen, T. Simula·Aug 25, 2020
We have studied ${\rm SU}(2)_k$ anyon models, assessing their prospects for topological quantum computation. In particular, we have compared the Ising ($k=2$) anyon and Fibonacci ($k=3$) anyon models, motivated by their potential for future realizati...
Simulating 2D Effects in Lattice Gauge Theories on a Quantum Computer
D. Paulson, Luca Dellantonio, J. Haase +8 more·Aug 21, 2020
Gauge theories are the most successful theories for describing nature at its fundamental level, but obtaining analytical or numerical solutions often remains a challenge. We propose an experimental quantum simulation scheme to study ground state prop...
Protocol Discovery for the Quantum Control of Majoranas by Differentiable Programming and Natural Evolution Strategies
Luuk Coopmans, Di Luo, G. Kells +2 more·Aug 20, 2020
Quantum control, which refers to the active manipulation of physical systems described by the laws of quantum mechanics, constitutes an essential ingredient for the development of quantum technology. Here we apply Differentiable Programming (DP) and ...
Witness of topological phase transition and Weyl points in an open topological system
M. Weng, Weijun Cheng, Zhihai Wang +1 more·Jul 27, 2020
Recently, the tunable Weyl-semimetal bands and the associate topological phase transition have been successfully simulated in superconducting quantum circuits [X. Tan, \textit{et al.} Phys. Rev. Lett. {\bf 122}, 010501 (2019)]. Since the superconduct...
Abelian topological order of ν=2/5 and 3/7 fractional quantum Hall states in lattice models
Bartholomew Andrews, M. Mohan, T. Neupert·Jul 17, 2020
Determining the statistics of elementary excitations supported by fractional quantum Hall states is crucial to understanding their properties and potential applications. In this paper, we use the topological entanglement entropy as an indicator of Ab...
Majorana-induced DC Shapiro steps in topological Josephson junctions
Sang-Jun Choi, A. Calzona, B. Trauzettel·Jun 10, 2020
The demonstration of the non-Abelian properties of Majorana bound states (MBS) is a crucial step toward topological quantum computing. We theoretically investigate how Majorana fusion rules manifest themselves in the current-voltage characteristics o...
Determining quantum phase diagrams of topological Kitaev-inspired models on NISQ quantum hardware
X. Xiao, J. Freericks, A. Kemper·Jun 9, 2020
Topological protection is employed in fault-tolerant error correction and in developing quantum algorithms with topological qubits. But, topological protection intrinsic to models being simulated, also robustly protects calculations, even on NISQ har...
Entangling logical qubits with lattice surgery
A. Erhard, Hendrik Poulsen Nautrup, M. Meth +10 more·Jun 4, 2020
The development of quantum computing architectures from early designs and current noisy devices to fully fledged quantum computers hinges on achieving fault tolerance using quantum error correction1–4. However, these correction capabilities come with...
Preliminary demonstration of a persistent Josephson phase-slip memory cell with topological protection
N. Ligato, E. Strambini, F. Paolucci +1 more·May 28, 2020
Superconducting computing promises enhanced computational power in both classical and quantum approaches. Yet, scalable and fast superconducting memories are not implemented. Here, we propose a fully superconducting memory cell based on the hystereti...
Quantum Probabilistic Spaces on Graphs for Topological Evolutions
R. Balu·May 16, 2020
We start with the consideration of fusion rules of anyonic particles evolving on a 2D surface and the a hypergroup comes with it to construct entangled quantum Markov chains. The fusion rules induce an association scheme with Krein parameters and the...