Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
QCSH: A full quantum computer nuclear shell-model package
Peng-Li Lv, Shijie Wei, Hao-Nan Xie +1 more·May 24, 2022
The nuclear system is a promising area for demonstrating practical quantum advantage. A comprehensive computation of a nuclear system in a classical computer is beyond the capacity of current classical computers. With the rapid development of hardwar...
Is quantum computing green? An estimate for an energy-efficiency quantum advantage
Daniel Jaschke, S. Montangero·May 24, 2022
The quantum advantage threshold determines when a quantum processing unit (QPU) is more efficient with respect to classical computing hardware in terms of algorithmic complexity. The ‘green’ quantum advantage threshold—based on a comparison of energe...
Proposal for low-power atom trapping on a GaN-on-sapphire chip
Aiping Liu, Lei Xu, Xin-Biao Xu +6 more·May 24, 2022
The hybrid photon-atom integrated circuits, which include photonic microcavities and trapped single neutral atom in their evanescent field, are of great potential for quantum information processing. In this platform, the atoms provide the single-photo...
Overfitting in quantum machine learning and entangling dropout
Masahiro Kobayashi, Kouhei Nakaji, N. Yamamoto·May 23, 2022
The ultimate goal in machine learning is to construct a model function that has a generalization capability for unseen dataset, based on given training dataset. If the model function has too much expressibility power, then it may overfit to the train...
A Quantum-compute Algorithm for Exact Laser-driven Electron Dynamics in Molecules
Fabian Langkabel, A. Bande·May 21, 2022
In this work, we investigate the capability of known quantum-computing algorithms for fault-tolerant quantum computing to simulate the laser-driven electron dynamics in small molecules such as lithium hydride. These computations are executed on a qua...
Optimal quantum reservoir computing for the NISQ era
L. Domingo, G. Carlo, F. Borondo·May 20, 2022
Universal fault-tolerant quantum computers require millions of qubits with low error rates. Since this technology is years ahead, noisy intermediate-scale quantum (NISQ) computation is receiving tremendous interest. In this setup, quantum reservoir c...
Universal Parity Quantum Computing.
M. Fellner, A. Messinger, K. Ender +1 more·May 19, 2022
We propose a universal gate set for quantum computing with all-to-all connectivity and intrinsic robustness to bit-flip errors based on parity encoding. We show that logical controlled phase gate and R_{z} rotations can be implemented in parity encod...
Nonadiabatic Holonomic Quantum Computation via Path Optimization
Lingtong Ji, Yan Liang, P. Shen +1 more·May 19, 2022
Nonadiabatic holonomic quantum computation (NHQC) is implemented by fast evolution processes in a geometric way to withstand local noises. However, recent works of implementing NHQC are sensitive to the systematic noise and error. Here, we present a ...
Low-rank tensor decompositions of quantum circuits
Patrick Gelß, Stefan Klus, Sebastian Knebel +2 more·May 19, 2022
Quantum computing is arguably one of the most revolutionary and disrup-tive technologies of this century. Due to the ever-increasing number of potential applications as well as the continuing rise in complexity, the development, simulation, optimizat...
Applications of universal parity quantum computation
M. Fellner, A. Messinger, K. Ender +1 more·May 19, 2022
We demonstrate the applicability of a universal gate set in the parity encoding, which is a dual to the standard gate model, by exploring several quantum gate algorithms such as the quantum Fourier transform and quantum addition. Embedding these algo...
Self-mitigating Trotter circuits for SU(2) lattice gauge theory on a quantum computer
Sarmed A Rahman, R. Lewis, E. Mendicelli +1 more·May 18, 2022
Quantum computers offer the possibility to implement lattice gauge theory in Minkowski rather than Euclidean spacetime, thus allowing calculations of processes that evolve in real time. In this work, calculations within SU(2) pure gauge theory are abl...
Fast evolution of single qubit gate in non-adiabatic geometric quantum computing
G. Tang, Xiaoyun Yang, Ying Yan +1 more·May 17, 2022
We implemented arbitrary single qubit gates of geometric quantum computing for a three-level system in a single-shot manner. The evolution time of the gate has been minimized by considering the shortest trajectory of the state on the Bloch sphere. Th...
Learning to Learn Quantum Turbo Detection
Bryan Liu, T. Koike-Akino, Ye Wang +1 more·May 17, 2022
This paper investigates a turbo receiver employing a variational quantum circuit (VQC). The VQC is configured with an ansatz of the quantum approximate optimization algorithm (QAOA). We propose a 'learning to learn' (L2L) framework to optimize the tu...
Multi-state Swap Test Algorithm
Wen Liu, Han-Wen Yin, Zhirao Wang +1 more·May 15, 2022
. Estimating the overlap between two states is an important task with several applications in quantum information. However, the typical swap test circuit can only measure a sole pair of quantum states at a time. In this study we designed a recursive ...
Fidelity Overhead for Nonlocal Measurements in Variational Quantum Algorithms.
Zachary Pierce Bansingh, Tzu-Ching Yen, Peter D. Johnson +1 more·May 14, 2022
Measuring quantum observables by grouping terms that can be rotated to sums of only products of Pauli ẑ operators (Ising form) is proven to be efficient in near term quantum computing algorithms. This approach requires extra unitary transformations t...
Robust, fast and high-fidelity composite single-qubit gates for superconducting transmon qubits
Hristo G. Tonchev, B. Torosov, N. Vitanov·May 9, 2022
We introduce a novel quantum control method for superconducting transmon qubits that substantially outperforms conventional techniques in precision and robustness against coherent errors. Our approach leverages composite pulses (CP) to effectively mi...
Co-Designed Architectures for Modular Superconducting Quantum Computers
Evan McKinney, M. Xia, Chao Zhou +3 more·May 9, 2022
Noisy, Intermediate Scale Quantum (NISQ) computers have reached the point where they can show the potential for quantum advantage over classical computing. Unfortunately, NISQ machines introduce sufficient noise that even for moderate size quantum ci...
Sketching the Best Approximate Quantum Compiling Problem
Liam Madden, A. Akhriev, Andrea Simonetto·May 9, 2022
This paper considers the problem of quantum compilation from an optimization perspective by fixing a circuit structure of CNOTs and rotation gates then optimizing over the rotation angles. We solve the optimization problem classically and consider al...
Incremental Data-Uploading for Full-Quantum Classification
Maniraman Periyasamy, Nico Meyer, Christian Ufrecht +3 more·May 6, 2022
The data representation in a machine-learning model strongly influences its performance. This becomes even more important for quantum machine learning models implemented on noisy intermediate scale quantum (NISQ) devices. Encoding high dimensional da...
Optimal compression of quantum many-body time evolution operators into brickwall circuits
M. Tepaske, D. Hahn, D. J. Luitz·May 6, 2022
Near term quantum computers suffer from a degree of decoherence which is prohibitive for high fidelity simulations with deep circuits. An economical use of circuit depth is therefore paramount. For digital quantum simulation of quantum many-body syst...