Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Prolonging a discrete time crystal by quantum-classical feedback
Gonzalo Camacho, B. Fauseweh·Sep 5, 2023
Nonequilibrium phases of quantum matter featuring time crystalline eigenstate order have been realized recently on noisy intermediate-scale quantum (NISQ) devices. While ideal quantum time crystals exhibit collective subharmonic oscillations and spat...
Efficient Classical Shadow Tomography through Many-body Localization Dynamics
Tian-Gang Zhou, P. Zhang·Sep 3, 2023
Classical shadow tomography serves as a potent tool for extracting numerous properties from quantum many-body systems with minimal measurements. Nevertheless, prevailing methods yielding optimal performance for few-body operators necessitate the appl...
Qutrit circuits and algebraic relations: A pathway to efficient spin-1 Hamiltonian simulation
Oluwadara Ogunkoya, Joo-Von Kim, Bo Peng +2 more·Sep 1, 2023
Quantum information processing has witnessed significant advancements through the application of qubit-based techniques within universal gate sets. Recently, exploration beyond the qubit paradigm to $d$-dimensional quantum units or qudits has opened ...
Hybrid algorithm for the time-dependent Hartree–Fock method using the Yang–Baxter equation on quantum computers
Sahil Gulania, Stephen K. Gray, Yuri Alexeev +2 more·Sep 1, 2023
The time-dependent Hartree–Fock (TDHF) method is an approach to simulate the mean field dynamics of electrons within the assumption that the electrons move independently in their self-consistent average field and within the space of single Slater det...
Dynamic adaptive quantum approximate optimization algorithm for shallow, noise-resilient circuits
Nikola Yanakiev, N. Mertig, Christopher K. Long +1 more·Aug 31, 2023
The quantum approximate optimization algorithm (QAOA) is an appealing proposal to solve NP problems on noisy intermediate-scale quantum (NISQ) hardware. Making NISQ implementations of the QAOA resilient to noise requires short ansatz circuits with as...
More quantum chemistry with fewer qubits
Jakob Günther, Alberto Baiardi, M. Reiher +1 more·Aug 31, 2023
Quantum computation is one of the most promising new paradigms for the simulation of physical systems composed of electrons and atomic nuclei, with applications in chemistry, solid-state physics, materials science, and molecular biology. This require...
Sequential quantum simulation of spin chains with a single circuit QED device
Yuxuan Zhang, Shahin Jahanbani, Ameya Riswadkar +2 more·Aug 30, 2023
Quantum simulation of many-body systems in materials science and chemistry are promising application areas for quantum computers. However, the limited scale and coherence of near-term quantum processors pose a significant obstacle to realizing this p...
Programmable Quantum Simulations on a Trapped-Ion Quantum Computer with a Global Drive.
Yotam Shapira, Jovan Markov, N. Akerman +2 more·Aug 30, 2023
Simulation of quantum systems is notoriously challenging for classical computers, while quantum hardware is naturally well-suited for this task. However, the imperfections of contemporary quantum systems pose a considerable challenge in carrying out ...
Single-ancilla ground state preparation via Lindbladians
Zhiyan Ding, Chi-Fang Chen, Lin Lin·Aug 30, 2023
We design a quantum algorithm for ground state preparation in the early fault tolerant regime. As a Monte Carlo style quantum algorithm, our method features a Lindbladian where the target state is stationary. The construction of this Lindbladian is a...
Quantum simulation approach to implementing nuclear density functional theory via imaginary time evolution
Y. Li, J. Al-Khalili, P. Stevenson·Aug 29, 2023
The quantum imaginary time evolution (QITE) algorithm is a direct implementation of the classical imaginary time evolution algorithm on quantum computer. We implement the QITE algorithm for the case of nuclear Hartree-Fock equations in a formalism eq...
High-fidelity transmon coupler activated CCZ gate on fluxonium qubits
I. A. Simakov, G. S. Mazhorin, I. N. Moskalenko +2 more·Aug 29, 2023
The Toffoli gate takes a special place in the quantum information theory. It opens up a path for efficient implementation of complex quantum algorithms. Despite tremendous progress of the quantum processors based on the superconducting qubits, realiz...
A cost-efficient quantum access network with qubit-based synchronization
C. Huang, Yen-Jie chen, T. Luo +4 more·Aug 28, 2023
Quantum key distribution (QKD) is a physical layer encryption technique that enables two distant parties to exchange secure keys with information-theoretic security. In the last two decades, QKD has transitioned from laboratory research to real-world...
Classical variational optimization of a PREPARE circuit for quantum phase estimation of quantum chemistry Hamiltonians
Hayata Morisaki, K. Mitarai, K. Fujii +1 more·Aug 26, 2023
We propose a method for constructing circuits for quantum phase estimation of a molecular Hamiltonian in quantum chemistry by using variational optimization of quantum circuits solely on classical computers. The circuit generates a quantum state whic...
The Potential of Quantum Techniques for Stock Price Prediction
Naman Srivastava, Gaurang Belekar, Neel Shahakar +1 more·Aug 25, 2023
We explored the potential applications of various Quantum Algorithms for stock price prediction by conducting a series of experimental simulations using both Classical as well as Quantum Hardware. Firstly, we extracted various stock price indicators,...
Observation of multiple steady states with engineered dissipation
Li Li, Tong Liu, Xue-yi Guo +9 more·Aug 25, 2023
Simulating the dynamics of open quantum systems is essential in achieving practical quantum computation and understanding novel nonequilibrium behaviors. However, quantum simulation of a many-body system coupled to an engineered reservoir has yet to ...
Multipartite Entanglement Distribution in Quantum Networks using Subgraph Complementations
Aniruddha Sen, K. Goodenough, Donald F. Towsley·Aug 25, 2023
Quantum networks are important for quantum communication, enabling tasks such as quantum teleportation, quantum key distribution, quantum sensing, and quantum error correction, often utilizing graph states, a specific class of multipartite entangled ...
Quantum-Informed Recursive Optimization Algorithms
Jernej Rudi Finžgar, Aron Kerschbaumer, M. Schuetz +2 more·Aug 25, 2023
We propose and implement a family of quantum-informed recursive optimization (QIRO) algorithms for combinatorial optimization problems. Our approach leverages quantum resources to obtain information that is used in problem-specific classical reductio...
Parallel-in-time quantum simulation via Page and Wootters quantum time
N. Diaz, Paolo Braccia, Martín Larocca +3 more·Aug 24, 2023
In the past few decades, researchers have created a veritable zoo of quantum algorithms by drawing inspiration from classical computing, information theory, and even from physical phenomena. Here, we present quantum algorithms for parallel-in-time si...
Efficient Long-Range Entanglement Using Dynamic Circuits
Elisa Baumer, Vinay Tripathi, Derek S. Wang +5 more·Aug 24, 2023
Quantum simulation traditionally relies on unitary dynamics, inherently imposing efficiency constraints on the generation of intricate entangled states. In principle, these limitations can be superseded by nonunitary, dynamic circuits. These circuits...
On the Study of Partial Qubit Hamiltonian for Efficient Molecular Simulation Using Variational Quantum Eigensolvers
Harshdeep Singh, Sabyashachi Mishra, S. Majumder·Aug 24, 2023
Quantum computing is being extensively used in quantum chemistry, especially in simulating simple molecules and evaluating properties like the ground state energy, dipole moment, etc. The transformation of a molecular Hamiltonian from the fermionic s...