Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Vulnerability of fault-tolerant topological quantum error correction to quantum deviations in code space
Yuan-Yuan Zhao, Dong Liu·Jan 30, 2023
Abstract Quantum computers face significant challenges from quantum deviations or coherent noise, particularly during gate operations, which pose a complex threat to the efficacy of quantum error correction (QEC) protocols. Here we scrutinize the per...
Deep Quantum Error Correction
Yoni Choukroun, Lior Wolf·Jan 27, 2023
Quantum error correction codes (QECC) are a key component for realizing the potential of quantum computing. QECC, as its classical counterpart (ECC), enables the reduction of error rates, by distributing quantum logical information across redundant p...
Non-Abelian anyons with Rydberg atoms
Nora Bauer, Elias Kokkas, Victor Ale +1 more·Jan 10, 2023
We study the emergence of topological matter in two-dimensional systems of neutral Rydberg atoms in Ruby lattices. While Abelian anyons have been predicted in such systems, non-Abelian anyons, which would form a substrate for fault-tolerant quantum c...
Reduced basis emulation of pairing in finite systems
V. Baran, D. Nichita·Dec 29, 2022
In recent years, reduced basis methods (RBMs) have been adapted to the many-body eigenvalue problem and they have been used, largely in nuclear physics, as fast emulators able to bypass expensive direct computations while still providing highly accur...
Decoding surface codes with deep reinforcement learning and probabilistic policy reuse
E. Matekole, Esther Ye, Ramya Iyer +1 more·Dec 22, 2022
Quantum computing (QC) promises significant advantages on certain hard computational tasks over classical computers. However, current quantum hardware, also known as noisy intermediate-scale quantum computers (NISQ), are still unable to carry out com...
Quantum computing on magnetic racetracks with flying domain wall qubits
J. Zou, S. Bosco, B. Pal +3 more·Dec 22, 2022
Domain walls (DWs) on magnetic racetracks are at the core of the field of spintronics, providing a basic element for classical information processing. Here, we show that mobile DWs also provide a blueprint for large-scale quantum computers. Remarkabl...
The ribbon category framework for topological quantum computing
Willie Aboumrad·Dec 6, 2022
. This expository article supplies the mathematical background underpinning the braid representation calculator introduced in [ Abo22]; those representations describe the sets of logic gates available to a topological quantum computer for processing ...
Generalized Belief Propagation Algorithms for Decoding of Surface Codes
Josias Old, M. Rispler·Dec 6, 2022
Belief propagation (BP) is well-known as a low complexity decoding algorithm with a strong performance for important classes of quantum error correcting codes, e.g. notably for the quantum low-density parity check (LDPC) code class of random expander...
A new twist on the Majorana surface code: Bosonic and fermionic defects for fault-tolerant quantum computation
Campbell McLauchlan, B. B'eri·Nov 21, 2022
Majorana zero modes (MZMs) are promising candidates for topologically-protected quantum computing hardware, however their large-scale use will likely require quantum error correction. Majorana surface codes (MSCs) have been proposed to achieve this. ...
Digital Simulation of Projective Non-Abelian Anyons with 68 Superconducting Qubits
Shibo Xu, Zheng Sun, Ke Wang +31 more·Nov 17, 2022
Non-Abelian anyons are exotic quasiparticle excitations hosted by certain topological phases of matter. They break the fermion-boson dichotomy and obey non-Abelian braiding statistics: their interchanges yield unitary operations, rather than merely a...
Exact Quantum Algorithms for Quantum Phase Recognition: Renormalization Group and Error Correction
E. Lake, S. Balasubramanian, Soonwon Choi·Nov 17, 2022
We explore the relationship between renormalization-group (RG) flow and error correction by constructing quantum algorithms that exactly recognize one-dimensional symmetry-protected topological (SPT) phases protected by finite internal Abelian symmet...
Quasiparticle poisoning rate in a superconducting transmon qubit involving Majorana zero modes
Xiaopei Sun, Zhaozheng Lyu, Enna Zhuo +8 more·Nov 15, 2022
Majorana zero modes have been attracting considerable attention because of their prospective applications in fault-tolerant topological quantum computing. In recent years, some schemes have been proposed to detect and manipulate Majorana zero modes u...
Superconductor/Ferromagnet Heterostructures: A Platform for Superconducting Spintronics and Quantum Computation
Ranran Cai, I. vZuti'c, Wei Han·Nov 15, 2022
The interplay between superconductivity and ferromagnetism in the superconductor/ferromagnet (SC/FM) heterostructures generates many interesting physical phenomena, including spin‐triplet superconductivity, superconducting order parameter oscillation...
Quantum Persistent Homology for Time Series
Bernardo Ameneyro, G. Siopsis, V. Maroulas·Nov 8, 2022
Persistent homology, a powerful mathematical tool for data analysis, summarizes the shape of data through tracking topological features across changes in different scales. Classical algorithms for persistent homol-ogy are often constrained by running...
Low-overhead quantum error-correction codes with a cyclic topology
I. A. Simakov, I. Besedin·Nov 6, 2022
Quantum error correction is an important ingredient for scalable quantum computing. Stabilizer codes are one of the most promising and straightforward ways to correct quantum errors, are convenient for logical operations, and improve performance with...
Deterministic Constant-Depth Preparation of the AKLT State on a Quantum Processor Using Fusion Measurements
Kevin C. Smith, E. Crane, N. Wiebe +1 more·Oct 31, 2022
The ground state of the spin-1 Affleck, Kennedy, Lieb and Tasaki (AKLT) model is a paradigmatic example of both a matrix product state and a symmetry-protected topological phase, and additionally holds promise as a resource state for measurement-base...
Programmable adiabatic demagnetization for systems with trivial and topological excitations
A. Matthies, M. Rudner, A. Rosch +1 more·Oct 31, 2022
We propose a simple, robust protocol to prepare a low-energy state of an arbitrary Hamiltonian on a quantum computer or programmable quantum simulator. The protocol is inspired by the adiabatic demagnetization technique, used to cool solid-state syst...
New magic state distillation factories optimized by temporally encoded lattice surgery
Prithviraj Prabhu, C. Chamberland·Oct 28, 2022
Fault-tolerant quantum computers, with error correction implemented using topological codes, will most likely require lattice surgery protocols in order to implement a universal gate set. Timelike failures during lattice surgery protocols can result ...
Entanglement Purification with Quantum LDPC Codes and Iterative Decoding
Narayanan Rengaswamy, Nithin Raveendran, Ankur Raina +1 more·Oct 25, 2022
Recent constructions of quantum low-density parity-check (QLDPC) codes provide optimal scaling of the number of logical qubits and the minimum distance in terms of the code length, thereby opening the door to fault-tolerant quantum systems with minim...
Deep Neural Networks as the Semi-classical Limit of Topological Quantum Neural Networks: The problem of generalisation
A. Marcianò, De-Wei Chen, Filippo Fabrocini +3 more·Oct 25, 2022
Deep Neural Networks miss a principled model of their operation. A novel framework for supervised learning based on Topological Quantum Field Theory that looks particularly well suited for implementation on quantum processors has been recently explor...