Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Encoding a magic state with beyond break-even fidelity
R. Gupta, N. Sundaresan, Thomas Alexander +10 more·May 23, 2023
To run large-scale algorithms on a quantum computer, error-correcting codes must be able to perform a fundamental set of operations, called logic gates, while isolating the encoded information from noise1–8. We can complete a universal set of logic g...
Non-Markovian cost function for quantum error mitigation with Dirac Gamma matrices representation
Doyeol Ahn·May 23, 2023
This paper investigates the non-Markovian cost function in quantum error mitigation (QEM) and employs Dirac Gamma matrices to illustrate two-qubit operators, significant in relativistic quantum mechanics. Amid the focus on error reduction in noisy in...
Stabilization of discrete time-crystalline response on a superconducting quantum computer by increasing the interaction range
Andrea Solfanelli, S. Ruffo, S. Succi +1 more·May 23, 2023
The simulation of complex quantum many-body systems is a promising short-term goal of noisy intermediate-scale quantum (NISQ) devices. However, the limited connectivity of native qubits hinders the implementation of quantum algorithms that require lo...
Neural-network-designed three-qubit gates robust against charge noise and crosstalk in silicon
David W. Kanaar, J. Kestner·May 22, 2023
Spin qubits in semiconductor quantum dots are a promising platform for quantum computing, however, scaling to large systems is hampered by crosstalk and charge noise. Crosstalk here refers to the unwanted off-resonant rotation of idle qubits during t...
A chip-scale polarization-spatial-momentum quantum SWAP gate in silicon nanophotonics
Xiang Cheng, Kaishuo Chang, Zhenda Xie +12 more·May 16, 2023
Recent progress in quantum computing and networking has enabled high-performance, large-scale quantum processors by connecting different quantum modules. Optical quantum systems show advantages in both computing and communications, and integrated qua...
Errors in heralded circuits for linear optical entanglement generation
Reece D. Shaw, Alex E. Jones, Patrick Yard +1 more·May 15, 2023
The heralded generation of entangled states underpins many photonic quantum technologies. As quantum error correction thresholds are determined by underlying physical noise mechanisms, a detailed and faithful characterization of resource states is re...
Predictive Models from Quantum Computer Benchmarks
Daniel Hothem, Jordan Hines, Karthik Nataraj +2 more·May 15, 2023
Holistic benchmarks for quantum computers are essential for testing and summarizing the performance of quantum hardware. However, holistic benchmarks-such as algorithmic or randomized benchmarks-typically do not predict a processor's performance on c...
Braiding-based quantum control of a Majorana qubit built from quantum dots
P. Boross, Andr'as P'alyi·May 15, 2023
Topology-related ideas might lead to noise-resilient quantum computing. For example, it is expected that the slow spatial exchange (`braiding') of Majorana zero modes in superconductors yields quantum gates that are robust against disorder. Here, we ...
Tunable helical crystals
R. Niyazov, D. Aristov, V. Kachorovskii·May 14, 2023
We consider a superlattice formed by tunnel-connected identical holes, periodically placed in a two-dimensional topological insulator. We study tunneling transport through helical edges of these holes and demonstrate that the band structure of such h...
Use VQE to calculate the ground energy of hydrogen molecules on IBM Quantum
Ma Qing, Wei Xie·May 11, 2023
Quantum computing has emerged as a promising technology for solving problems that are intractable for classical computers. In this study, we introduce quantum computing and implement the Variational Quantum Eigensolver (VQE) algorithm using Qiskit on...
Family of Quantum Codes with Exotic Transversal Gates.
Eric Kubischta, Ian Teixeira·May 11, 2023
Recently, an algorithm has been constructed that shows that the binary icosahedral group 2I together with a T-like gate forms the most efficient single-qubit universal gate set. To carry out the algorithm fault tolerantly requires a code that impleme...
Enabling Full-Stack Quantum Computing with Changeable Error-Corrected Qubits
Anbang Wu, Keyi Yin, Andrew W. Cross +2 more·May 11, 2023
Executing quantum applications with quantum error correction (QEC) faces the gate non-universality problem imposed by the Eastin-Knill theorem. As one resource-time-efficient solution, code switching changes the encoding of logical qubits to implemen...
Fault-tolerant quantum algorithm for symmetry-adapted perturbation theory
C. Cortes, Matthias Loipersberger, R. Parrish +9 more·May 11, 2023
The efficient computation of observables beyond the total energy is a key challenge and opportunity for fault-tolerant quantum computing approaches in quantum chemistry. Here we consider the symmetry-adapted perturbation theory (SAPT) components of t...
Fully quantum algorithm for mesoscale fluid simulations with application to partial differential equations
Sriharsha Kocherla, Zhixin Song, F. Chrit +4 more·May 11, 2023
Fluid flow simulations marshal our most powerful computational resources. In many cases, even this is not enough. Quantum computers provide an opportunity to speed up traditional algorithms for flow simulations. We show that lattice-based mesoscale n...
High-fidelity gates with mid-circuit erasure conversion in a metastable neutral atom qubit
Shuo Ma, Genyue Liu, Pai Peng +7 more·May 9, 2023
The development of scalable, high-fidelity qubits is a key challenge in quantum information science. Neutral atom qubits have progressed rapidly in recent years, demonstrating programmable processors and quantum simulators with scaling to hundreds of...
Nonlinear chiral magnetic waves
Kazuki Ikeda, D. Kharzeev, S. Shi·May 9, 2023
The chiral magnetic wave (CMW) is a macroscopic quantum phenomenon that arises due to the mixing of the electric and chiral charge oscillations induced by the chiral anomaly. In this study we report the first quantum simulation (on classical hardware...
Quantum Approximate Optimization Algorithm with Cat Qubits
Pontus Vikstaal, Laura Garc'ia-'Alvarez, S. Puri +1 more·May 9, 2023
The Quantum Approximate Optimization Algorithm (QAOA) -- one of the leading algorithms for applications on intermediate-scale quantum processors -- is designed to provide approximate solutions to combinatorial optimization problems with shallow quant...
Experimentally Demonstrating Indefinite Causal Order Algorithms to Solve the Generalized Deutsch's Problem
Wen‐Qiang Liu, Zhe Meng, Bo Song +6 more·May 9, 2023
Deutsch's algorithm is the first quantum algorithm to demonstrate an advantage over classical algorithms. Here, Deutsch's problem is generalized to n$n$ functions and a quantum algorithm with an indefinite causal order is proposed to solve this probl...
Folded Spectrum VQE: A Quantum Computing Method for the Calculation of Molecular Excited States
Lila Cadi Tazi, A. Thom·May 8, 2023
The recent developments of quantum computing present novel potential pathways for quantum chemistry as the scaling of the computational power of quantum computers could be harnessed to naturally encode and solve electronic structure problems. Theoret...
Operational Markovianization in randomized benchmarking
Pedro Figueroa Romero, Miha Papič, Adrian Auer +3 more·May 8, 2023
A crucial task to obtain optimal and reliable quantum devices is to quantify their overall performance. The average fidelity of quantum gates is a particular figure of merit that can be estimated efficiently by randomized benchmarking (RB). However, ...