Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Energy Risk Analysis With Dynamic Amplitude Estimation and Piecewise Approximate Quantum Compiling
Kumar Ghosh, Kavitha Yogaraj, Gabriele Agliardi +6 more·May 16, 2023
In this article, we generalize the approximate quantum compiling algorithm into a new method for cnot-depth reduction, which is apt to process wide target quantum circuits. Combining this method with state-of-the-art techniques for error mitigation a...
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...
Recognizing critical lines via entanglement in non-Hermitian systems
Keshav Das Agarwal, Tanoy Kanti Konar, Leela Ganesh Chandra Lakkaraju +1 more·May 15, 2023
The non-Hermitian model exhibits counterintuitive phenomena that are not observed in the Hermitian counterparts. To probe the competition between non-Hermitian and Hermitian interacting components of the Hamiltonian, we focus on a system containing n...
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...
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...
Fusion Blossom: Fast MWPM Decoders for QEC
Yuehua Wu, Lin Zhong·May 15, 2023
The Minimum-Weight Perfect Matching (MWPM) decoder is widely used in Quantum Error Correction (QEC) decoding. Despite its high accuracy, existing implementations of the MWPM decoder cannot catch up with quantum hardware, e.g., 1 million measurements ...
Colloquium : Quantum and classical discrete time crystals
M. Zaletel, M. Lukin, C. Monroe +3 more·May 15, 2023
The spontaneous breaking of time translation symmetry has led to the discovery of a new phase of matter - the discrete time crystal. Discrete time crystals exhibit rigid subharmonic oscillations, which result from a combination of many-body interacti...
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 ...
Meta-optimization of resources on quantum computers
I. Mohammad, Matej Pivoluska, Martin Plesch·May 15, 2023
The current state of quantum computing is commonly described as the Noisy Intermediate-Scale Quantum era. Available computers contain a few dozens of qubits and can perform a few dozens of operations before the inevitable noise erases all information...
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...
Hybrid Quantum Algorithms integrating QAOA, Penalty Dephasing and Zeno Effect for Solving Binary Optimization Problems with Multiple Constraints
Ke Wan, Yiwen Liu·May 14, 2023
When tackling binary optimization problems using quantum algorithms, the conventional Ising representation and Quantum Approximate Optimization Algorithm (QAOA) encounter difficulties in efficiently handling errors for large-scale problems involving ...
Quantum computing for electronic structure analysis: Ground state energy and molecular properties calculations
Nouhaila Innan, Muhammad Al-Zafar Khan, Mohamed Bennai·May 13, 2023
The computation of electronic structure properties at the quantum level is a crucial aspect of modern physics research. However, conventional methods can be computationally demanding for larger, more complex systems. To address this issue, we present...
A resource-efficient quantum-classical hybrid algorithm for energy gap evaluation
Yongdan Yang, Ying Li, Xiaosi Xu +1 more·May 12, 2023
Estimating the eigenvalue or energy gap of a Hamiltonian H is vital for studying quantum many-body systems. Particularly, many of the problems in quantum chemistry, condensed matter physics, and nuclear physics investigate the energy gap between two ...
High density fabrication process for single flux quantum circuits
D. Yohannes, M. Renzullo, J. Vivalda +6 more·May 12, 2023
We implemented, optimized, and fully tested a superconducting Josephson junction fabrication process over multiple runs tailored for integrated digital circuits that are used for control and readout of superconducting qubits operating at millikelvin ...
Implications of Deep Circuits in Improving Quality of Quantum Question Answering
Pragya Katyayan, Nisheeth Joshi·May 12, 2023
Question Answering (QA) has proved to be an arduous challenge in the area of natural language processing (NLP) and artificial intelligence (AI). Many attempts have been made to develop complete solutions for QA as well as improving significant sub-mo...
A Full Quantum Generative Adversarial Network Model for High Energy Physics Simulations
F. Rehm, S. Vallecorsa, M. Grossi +2 more·May 12, 2023
The prospect of quantum computing with a potential exponential speed-up compared to classical computing identifies it as a promising method in the search for alternative future High Energy Physics (HEP) simulation approaches. HEP simulations, such as...
Adaptive variational simulation for open quantum systems
Huo Chen, N. Gomes, Siyuan Niu +1 more·May 11, 2023
Emerging quantum hardware provides new possibilities for quantum simulation. While much of the research has focused on simulating closed quantum systems, the real-world quantum systems are mostly open. Therefore, it is essential to develop quantum al...
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...
Variational quantum eigensolver with embedded entanglement using a tensor-network ansatz
Ryoh Watanabe, K. Fujii, H. Ueda·May 11, 2023
In this paper, we introduce a tensor network (TN) scheme into the entanglement augmentation process of the synergistic optimization framework by Rudolph et al. [arXiv:2208.13673] to build its process systematically for inhomogeneous systems. Our syne...
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...