Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Performance and achievable rates of the Gottesman-Kitaev-Preskill code for pure-loss and amplification channels
Guo Zheng, Wenhao He, Gideon Lee +2 more·Dec 9, 2024
Quantum error correction codes protect information from realistic noisy channels and lie at the heart of quantum computation and communication tasks. Understanding the optimal performance and other information-theoretic properties, such as the achiev...
Variational quantum compiling for three-qubit-gate design in quantum dots
Yuan-Hang Zhou, Huaxin He, Fengtao Pang +3 more·Dec 9, 2024
Semiconductor quantum dots offer a promising platform for controlling spin qubits and realizing quantum logic gates, essential for scalable quantum computing. In this work, we utilize a variational quantum compiling algorithm to design efficient thre...
Noise-induced quantum-circuit refrigeration
Heidi Kivijarvi, A. Viitanen, Timm Morstedt +1 more·Dec 8, 2024
We use a transmon qubit and its dispersively coupled readout resonator to measure the Fock state populations of another microwave resonator, to which we have attached a quantum-circuit refrigerator (QCR). First, we apply noise generated at room tempe...
Fault-Tolerant Implementation of the Deutsch-Jozsa Algorithm
Divyanshu Singh, S. Prakash·Dec 6, 2024
We show that one can implement the Deutsch-Josza algorithm, one of the first and simplest quantum algorithms, in a fault-tolerant manner using the smallest quantum error-detecting code -- the $[[4,2,2]]$ code -- without any ancillae. We implemented t...
Quantized Hall drift in a frequency-encoded photonic Chern insulator
Alexandre Chénier, Bosco d'Aligny, Félix Pellerin +4 more·Dec 5, 2024
The quantization of transport and its resilience to backscattering are key features for leveraging topological matter in applications that demand stringent noise mitigation, such as metrology and quantum information processing. Due to the bosonic nat...
Clifford-Deformed Compass Codes
Julie A. Campos, Kenneth R. Brown·Dec 5, 2024
We can design efficient quantum error-correcting (QEC) codes by tailoring them to our choice of quantum architecture. Useful tools for constructing such codes include Clifford deformations and appropriate gauge fixings of compass codes. In this work,...
Engineering qubit dynamics in open systems with photonic synthetic lattices
Francesco Di Colandrea, Tareq Jaouni, J. Grace +4 more·Dec 5, 2024
The evolution of a quantum system interacting with an environment can be described as a unitary process acting on both the system and the environment. In this framework, the system's evolution can be predicted by tracing out the environmental degrees...
Bayesian Quantum Amplitude Estimation
Alexandra Ramoa, Lu'is Paulo Santos·Dec 5, 2024
We present BAE, a problem-tailored and noise-aware Bayesian algorithm for quantum amplitude estimation. In a fault tolerant scenario, BAE is capable of saturating the Heisenberg limit; if device noise is present, BAE can dynamically characterize it a...
Two-detector reconstruction of multiphoton states in linear optical networks
Tudor-Alexandru Isdrailva, Jun-Yi Wu·Dec 5, 2024
We propose a method for partial state reconstruction of multiphoton states in multimode ($N$-photon $M$-mode) linear optical networks (LONs) employing only two bucket photon-number-resolving (PNR) detectors. The reconstructed Heisenberg-Weyl-reduced ...
Quantum circuit and mapping algorithms for wavepacket dynamics: case study of anharmonic hydrogen bonds in protonated and hydroxide water clusters
Debadrita Saha, Philip Richerme, S. Iyengar·Dec 4, 2024
The accurate computational study of wavepacket nuclear dynamics is considered to be a classically intractable problem, particularly with increasing dimensions. Here, we present two algorithms that, in conjunction with other methods developed by us, m...
Variational quantum classifiers via a programmable photonic microprocessor
Hexiang Lin, Huihui Zhu, Zan Tang +7 more·Dec 4, 2024
Quantum computing holds promise across various fields, particularly with the advent of Noisy Intermediate-Scale Quantum (NISQ) devices, which can outperform classical supercomputers in specific tasks. However, challenges such as noise and limited qub...
Ground State Energy Estimation on Current Quantum Hardware Through The Variational Quantum Eigensolver: A Comprehensive Study
N. Belaloui, Abdellah Tounsi, Rabah Abdelmouheymen Khamadja +4 more·Dec 3, 2024
While numerical simulations are presented in most papers introducing new methods to enhance the VQE performance, comprehensive, comparative, and applied studies remain relatively rare. We present a comprehensive, yet concise guide for the implementat...
Hamiltonian characterization of multi-time processes with classical memory
Kaumudibikash Goswami, Abhinash Kumar Roy, Varun Srivastava +4 more·Dec 2, 2024
A central problem in open quantum systems is the characterization of non-Markovian processes, where an environment retains the memory of its interaction with the system. A key distinction is whether or not this memory can be simulated classically, as...
Feasibility of Logical Bell State Generation in Memory-Assisted Quantum Networks
Vladlen Galetsky, Nilesh Vyas, A. Comin +1 more·Dec 2, 2024
This study explores the feasibility of utilizing quantum error correction (QEC) to generate and store logical Bell states in heralded quantum entanglement protocols, crucial for quantum repeater networks. Two lattice surgery-based protocols (local an...
Enhanced feature encoding and classification on distributed quantum hardware
Roberto Moretti, Andrea Giachero, V. Radescu +1 more·Dec 2, 2024
The steady progress of quantum hardware is motivating the search for novel quantum algorithm optimization strategies for near-term, real-world applications. In this study, we propose a novel feature map optimization strategy for quantum support vecto...
Bringing Quantum Systems under Control: A Tutorial Invitation to Quantum Computing and Its Relation to Bilinear Control Systems
Julian Berberich, R. Kosut, Thomas Schulte-Herbrüggen·Dec 1, 2024
Quantum computing comes with the potential to push computational boundaries in various domains including, e.g., cryptography, simulation, optimization, and machine learning. Exploiting the principles of quantum mechanics, new algorithms can be develo...
Quantum Active Learning for Structural Determination of Doped Nanoparticles - A Case Study of 4Al@Si11
Maicon Pierre Lourenço, Mosayeb Naseri, Lizandra Barrios Herrera +4 more·Nov 30, 2024
Active learning (AL) has been widely applied in chemistry and materials science. In this work, we propose a quantum active learning (QAL) method for automatic structural determination of doped nanoparticles, where quantum machine learning (QML) model...
Quantum algorithm for unstructured search of ranked targets
Kota Tani, Shunji Tsuchiya, S. Tani +1 more·Nov 29, 2024
Grover’s quantum algorithm can find a marked item from an unstructured database faster than any classical algorithm, and hence it has been used for several applications such as cryptanalysis and optimization. When there exist multiple marked items, G...
Quantum feedback control with a transformer neural network architecture
Pranav Vaidhyanathan, Florian Marquardt, Mark T. Mitchison +1 more·Nov 28, 2024
Attention-based neural networks such as transformers have revolutionized various fields such as natural language processing, genomics, and vision. Here, we demonstrate the use of transformers for quantum feedback control through both a supervised and...
Ground-State Preparation of the Fermi-Hubbard Model on a Quantum Computer with 2D Topology via Quantum Eigenvalue Transformation of Unitary Matrices
Thilo R. Muller, Manuel Geiger, C. Mendl·Nov 27, 2024
Quantum computing holds immense promise for simulating quantum systems, a critical task for advancing our understanding of complex quantum phenomena. One of the primary goals in this domain is to accurately approximate the ground state of quantum sys...