Papers
Live trends in quantum computing research, updated daily from arXiv.
Total Papers
28,807
This Month
482
Today
0
Research Volume
13,828 papers in 12 months (-12% vs prior quarter)
Research Focus Areas
Papers by research theme (12 months). Hover for details.
Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
ANN-enhanced detection of multipartite entanglement in a three-qubit NMR quantum processor
Vaishali Gulati, Shivanshu Siyanwal, Arvind +1 more·Sep 29, 2024
We use an artificial neural network (ANN) model to identify the entanglement class of an experimentally generated three-qubit pure state drawn from one of the six inequivalent classes under stochastic local operations and classical communication (SLO...
Fault-Tolerant Belief Propagation for Practical Quantum Memory
Kao-Yueh Kuo, Ching-Yi Lai·Sep 27, 2024
A fault-tolerant approach to reliable quantum memory is essential for scalable quantum computing, as physical qubits are susceptible to noise. Quantum error correction (QEC) must be continuously performed to prolong the memory lifetime. In QEC, error...
Quantum superposing algorithm for quantum encoding
Jaehee Kim, Taewan Kim, Kyunghyun Baek +3 more·Sep 27, 2024
Efficient encoding of classical data into quantum state—currently referred to as quantum encoding—holds crucial significance in quantum computation. For finite-size databases and qubit registers, a common strategy of the quantum encoding entails esta...
MG-Net: Learn to Customize QAOA with Circuit Depth Awareness
Yan Qian, Xinbiao Wang, Yuxuan Du +2 more·Sep 27, 2024
Quantum Approximate Optimization Algorithm (QAOA) and its variants exhibit immense potential in tackling combinatorial optimization challenges. However, their practical realization confronts a dilemma: the requisite circuit depth for satisfactory per...
Subspace preserving quantum convolutional neural network architectures
Léo Monbroussou, Jonas Landman, Letao Wang +2 more·Sep 27, 2024
Subspace preserving quantum circuits are a class of quantum algorithms that, relying on some symmetries in the computation, can offer theoretical guarantees for their training. Those algorithms have gained extensive interest as they can offer polynom...
Exponential separation in quantum query complexity of the quantum switch with respect to simulations with standard quantum circuits
Hl'er Kristj'ansson, Tatsuki Odake, Satoshi Yoshida +4 more·Sep 27, 2024
Quantum theory is consistent with a computational model permitting black-box operations to be applied in an indefinite causal order, going beyond the standard circuit model of computation. The quantum switch -- the simplest such example -- has been s...
Unveiling Hidden Vulnerabilities in Quantum Systems by Expanding Attack Vectors through Heisenberg's Uncertainty Principle
José R. Rosas-Bustos, J. The, Roydon Fraser·Sep 27, 2024
This paper identifies theoretical vulnerabilities in quantum integrity verification by demonstrating that Bell inequality (BI) violations, central to the detection of quantum entanglement, can align with predictions from hidden variable theories (HVT...
Buried Dirac points in quantum spin Hall insulators: Implications for Majorana Kramers pair-based quantum computing
J. Cuozzo, Wenlong Yu, Xiaoyan Shi +5 more·Sep 27, 2024
For heterostructures formed by a quantum spin Hall insulator (QSHI) placed in proximity to a superconductor (SC), no external magnetic field is necessary to drive the system into a phase supporting topological superconductivity with Majorana zero ene...
Quantum algorithms for drone mission planning
Ethan Davies, Pranav Kalidindi·Sep 27, 2024
Mission planning often involves optimising the use of ISR (Intelligence, Surveillance and Reconnaissance) assets in order to achieve a set of mission objectives within allowed parameters subject to constraints. The missions of interest here, involve ...
Theory and simulations of few-photon Fock state pulses strongly interacting with a single qubit in a waveguide: exact population dynamics and time-dependent spectra
S. Regidor, Andreas Knorr, Stephen Hughes·Sep 27, 2024
We present a detailed quantum theory and simulations of a few-photon Fock state pulse interacting with a two-level system (TLS) in a waveguide. For a rectangular pulse shape, we present an exact temporal scattering theory for the waveguide-QED system...
A probabilistic imaginary-time evolution quantum algorithm for advection-diffusion equation: Explicit gate-level implementation and comparisons to quantum linear system algorithms
Xinchi Huang, Hirofumi Nishi, Taichi Kosugi +2 more·Sep 27, 2024
Simulating differential equations on classical computers becomes an intractable problem if the grid size is extremely large. Quantum computers are believed to achieve a possibly exponential speedup in the matrix operation. In this paper, we propose a...
Parallel Quantum Signal Processing Via Polynomial Factorization
John M. Martyn, Z. M. Rossi, Kevin Z. Cheng +2 more·Sep 27, 2024
Quantum signal processing (QSP) is a methodology for constructing polynomial transformations of a linear operator encoded in a unitary. Applied to an encoding of a state ρ, QSP enables the evaluation of nonlinear functions of the form tr(P(ρ)) for a ...
Transpiling Quantum Assembly Language Circuits to a Qudit Form
D. Drozhzhin, Anastasiia S. Nikolaeva, E. Kiktenko +1 more·Sep 27, 2024
In this paper, we introduce the workflow for converting qubit circuits represented by Open Quantum Assembly format (OpenQASM, also known as QASM) into the qudit form for execution on qudit hardware and provide a method for translating qudit experimen...
Simulating the quantum switch with quantum circuits is computationally hard
Jessica Bavaresco, Hlér Kristjánsson, Mio Murao +4 more·Sep 26, 2024
Higher-order transformations acting on input quantum channels in an indefinite causal order, such as the quantum switch, cannot be described by quantum circuits using the same number of calls to the input channels. A natural question is whether they ...
Optimal Quantum Purity Amplification
Zhaoyi Li, Honghao Fu, Takuya Isogawa +2 more·Sep 26, 2024
Quantum purity amplification (QPA) provides a novel approach to counteracting the pervasive noise that degrades quantum states. We present the optimal QPA protocol for general quantum systems and global noise, resolving a two-decade open problem. Und...
Optimal quantum (tensor product) expanders from unitary designs
Cécilia Lancien·Sep 26, 2024
In this work we investigate how quantum expanders (i.e. quantum channels with few Kraus operators but a large spectral gap) can be constructed from unitary designs. Concretely, we prove that a random quantum channel whose Kraus operators are independ...
Quantum entanglement in phase space
Shuheng Liu, Jiajie Guo, Qiongyi He +1 more·Sep 26, 2024
While commonly used entanglement criteria for continuous variable systems are based on quadrature measurements, here we study entanglement detection from measurements of the Wigner function. These are routinely performed in platforms such as trapped ...
Loop Algorithm for Quantum Transverse Ising Model in a Longitudinal Field
Wei Xu, Xue-Feng Zhang·Sep 26, 2024
The quantum transverse Ising model and its extensions play a critical role in various fields, such as statistical physics, quantum magnetism, quantum simulations, and mathematical physics. Although it does not suffer from the sign problem in most cas...
Entanglement distribution over 155 km metropolitan fiber using a CMOS-compatible silicon chip
Jinyi Du, Xingjian Zhang, George F. R. Chen +3 more·Sep 26, 2024
Transmitting entangled states over long distances is crucial for developing quantum networks. Previous demonstrations using satellites or fibers relied on photon pairs generated from bulk crystal arrangements. Polarization entanglement distribution b...
QuForge: A Library for Qudits Simulation
Tiago de Souza Farias, Lucas Friedrich, Jonas Maziero·Sep 26, 2024
Quantum computing with qudits, an extension of qubits to multiple levels, is a research field less mature than qubit-based quantum computing. However, qudits can offer some advantages over qubits, by representing information with fewer separated comp...