Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Hardware-efficient variational quantum algorithm in a trapped-ion quantum computer
Jingze Zhuang, Y. Wu, L. Duan·Jul 3, 2024
We study a hardware-efficient variational quantum algorithm ansatz tailored for the trapped-ion quantum simulator, HEA-TI. We leverage programmable single-qubit rotations and global spin-spin interactions among all ions, reducing the dependence on re...
Improved finite-size key rates for discrete-modulated continuous variable quantum key distribution under coherent attacks
Carlos Pascual-Garc'ia, Stefan Bäuml, Mateus Ara'ujo +2 more·Jul 3, 2024
Continuous variable quantum key distribution (CVQKD) with discrete modulation combines advantages of CVQKD, such as the implementability using readily available technologies, with advantages of discrete variable quantum key distribution, such as easi...
Teleporting two-qubit entanglement across 19 qubits on a superconducting quantum computer
Haiyue Kang, John F. Kam, Gary J. Mooney +1 more·Jul 3, 2024
Quantum teleportation is not merely a fascinating corollary of quantum entanglement, it also finds utility in quantum processing and circuit compilation. In this paper, we measure and track the entanglement and fidelity of two-qubit states prepared o...
The sudden death of quantum advantage in correlation generations
Weixiao Sun, Fuchuan Wei, Yuguo Shao +1 more·Jul 3, 2024
As quantum error corrections still cannot be realized physically, quantum noise is the most profound obstacle to the implementations of large-scale quantum algorithms or quantum schemes. It has been well-known that if a quantum computer suffers from ...
Numerical solution of nonlinear Schrödinger equation by a hybrid pseudospectral-variational quantum algorithm
Nikolas Köcher, Hendrik Rose, Sachin S. Bharadwaj +2 more·Jul 3, 2024
The time-dependent one-dimensional nonlinear Schrödinger equation (NLSE) is solved numerically by a hybrid pseudospectral-variational quantum algorithm that connects a pseudospectral step for the Hamiltonian term with a variational step for the nonli...
Accelerating quantum imaginary-time evolution with random measurements
Ioannis Kolotouros, David Joseph, Anand Kumar Narayanan·Jul 3, 2024
Quantum imaginary-time evolution (QITE) is a promising tool to prepare thermal or ground states of Hamiltonians, as convergence is guaranteed when the evolved state overlaps with the ground state. However, its implementation using a a hybrid quantum-...
CRUISE on Quantum Computing for Feature Selection in Recommender Systems
Jiayang Niu, Jie Li, Ke Deng +1 more·Jul 3, 2024
Using Quantum Computers to solve problems in Recommender Systems that classical computers cannot address is a worthwhile research topic. In this paper, we use Quantum Annealers to address the feature selection problem in recommendation algorithms. Th...
A Framework for Quantum Finite-State Languages with Density Mapping
Seung-Yeop Baik, Sicheol Sung, Yo-Sub Han·Jul 3, 2024
A quantum finite-state automaton (QFA) is a theoretical model designed to simulate the evolution of a quantum system with finite memory in response to sequential input strings. We define the language of a QFA as the set of strings that lead the QFA t...
Programming universal unitary transformations on a general-purpose silicon photonics platform
José Roberto Rausell-Campo, D. P'erez, L'opez +1 more·Jul 3, 2024
General-purpose programmable photonic processors provide a versatile platform for integrating diverse functionalities on a single chip. Leveraging a two-dimensional hexagonal waveguide mesh of Mach-Zehnder interferometers, these systems have demonstr...
Qudit-native measurement protocol for dynamical correlations using Hadamard tests
Pavel P. Popov, Kevin T. Geier, Valentin Kasper +2 more·Jul 3, 2024
Dynamical correlations reveal important out-of-equilibrium properties of the underlying quantum many-body system, yet they are notoriously difficult to measure in experiments. While measurement protocols for dynamical correlations based on Hadamard t...
Warm Start of Variational Quantum Algorithms for Quadratic Unconstrained Binary Optimization Problems
Yahui Chai, Karl Jansen, Stefan Kühn +2 more·Jul 2, 2024
Variational Quantum Eigensolver (VQE) is widely used in near-term hardware. However, their performances remain limited by the poor trainability and are dependent on random parameter initialization. In this work, we propose a warm start method inspire...
Large-scale quantum reservoir learning with an analog quantum computer
Milan Kornjavca, Hong-Ye Hu, Chen Zhao +50 more·Jul 2, 2024
Quantum machine learning has gained considerable attention as quantum technology advances, presenting a promising approach for efficiently learning complex data patterns. Despite this promise, most contemporary quantum methods require significant res...
Imposing Constraints on Driver Hamiltonians and Mixing Operators: From Theory to Practical Implementation
H. Leipold, F. Spedalieri, Stuart Hadfield +1 more·Jul 2, 2024
Driver Hamiltonians and Mixing Operators that satisfy constraints is an important part of ansatz construction for many quantum algorithms. In this manuscript, we give general algebraic expressions for finding Hamiltonian terms and analogously unitary...
Strong Intrinsic Longitudinal Coupling in Circuit Quantum Electrodynamics.
C. Potts, R. Dekker, S. Deve +2 more·Jul 2, 2024
Radiation-pressure interactions between harmonic oscillators have enabled exquisite measurement precision and control, made possible by using strong sideband drives, enhancing the coupling rate while also linearizing the interaction. In this Letter, ...
Global calibration of large-scale photonic integrated circuits
Jin Zheng, Qin-Qin Wang, Lantian Feng +5 more·Jul 2, 2024
The growing maturity of photonic integrated circuit (PIC) fabrication technology enables the high integration of an increasing number of optical components onto a single chip. With the incremental circuit complexity, the calibration of active phase s...
Coherent information for Calderbank-Shor-Steane codes under decoherence
Ryotaro Niwa, Jong Yeon Lee·Jul 2, 2024
Stabilizer codes lie at the heart of modern quantum-error-correcting codes (QECC). Of particular importance is a class called Calderbank-Shor-Steane (CSS) codes, which includes many important examples such as toric codes, color codes, and fractons. R...
Globally driven superconducting quantum computing architecture
Roberto Menta, Francesco Cioni, Riccardo Aiudi +2 more·Jul 1, 2024
We propose a platform for implementing a universal, quantum computer based on a 2D ladder hosting three different species of superconducting qubits. In stark contrast with the existing literature, our scheme exploits the always-on longitudinal ZZ cou...
Clifford Dressed Time-Dependent Variational Principle.
A. Mello, Alessandro Santini, Guglielmo Lami +2 more·Jul 1, 2024
We propose an enhanced time-dependent variational principle (TDVP) algorithm for matrix product states that integrates Clifford disentangling techniques to efficiently manage entanglement growth. By leveraging the Clifford group, which maps Pauli str...
Superconducting Quantum Simulation for Many-Body Physics beyond Equilibrium
Yunyan Yao, L. Xiang·Jul 1, 2024
Quantum computing is an exciting field that uses quantum principles, such as quantum superposition and entanglement, to tackle complex computational problems. Superconducting quantum circuits, based on Josephson junctions, is one of the most promisin...
Visual Analytics of Performance of Quantum Computing Systems and Circuit Optimization
Junghoon Chae, C. Steed, Travis S. Humble·Jul 1, 2024
Driven by potential exponential speedups in business, security, and scientific scenarios, interest in quantum computing is surging. This interest feeds the development of quantum computing hardware, but several challenges arise in optimizing applicat...