Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Calibrating quantum gates up to 52 qubits in a superconducting processor
D. Fan, Guoding Liu, Shaowei Li +18 more·Feb 26, 2025
Benchmarking large-scale quantum gates, typically involving multiple native two-qubit and single-qubit gates, is crucial in quantum computing. Global fidelity, encompassing information about inter-gate correlations, offers a comprehensive metric for ...
Quantum reservoir computing for photonic entanglement witnessing
Danilo Zia, Luca Innocenti, Giorgio Minati +10 more·Feb 25, 2025
Accurately estimating properties of quantum states, such as entanglement, while essential for the development of quantum technologies, remains a challenging task. Standard approaches to property estimation rely on detailed modeling of the measurement...
Adaptive Quantum Scaling Model for Histogram Distribution-based Quantum Watermarking
Zheng Xing, C. Lam, Xiaochen Yuan +2 more·Feb 25, 2025
The development of quantum image representation and quantum measurement techniques has made quantum image processing research a hot topic. In this paper, a novel Adaptive Quantum Scaling Model (AQSM) is first proposed for scrambling watermark images....
Programmable interferometer: An application in quantum channels
J. S. Araújo, K. Khan, A. S. Coelho·Feb 25, 2025
Quantum optics plays a crucial role in developing quantum computers on different platforms. In photonics, precise control over light's degrees of freedom, including discrete variables (polarization, photon number, orbital angular momentum) and contin...
Novel quantum circuit for image compression utilizing modified Toffoli gate and quantized transformed coefficient alongside a novel reset gate
Md. Ershadul Haque, Manoranjan Paul·Feb 25, 2025
Quantum image computing has emerged as a groundbreaking field, revolutionizing how we store and process data at speeds incomparable to classical methods. Nevertheless, as image sizes expand, so does the complexity of qubit connections, posing signifi...
Pauli Measurements Are Not Optimal for Single-Copy Tomography
Jayadev Acharya, Abhilash Dharmavarapu, Yuhan Liu +1 more·Feb 25, 2025
Quantum state tomography is a fundamental problem in quantum computing. Given n copies of an unknown N-qubit state ρ∈ℂd× d,d=2N, the goal is to learn the state up to an accuracy ε in trace distance, say with at least constant probability 0.99. We are...
Indefinite Time Directed Quantum Metrology
Gaurang Agrawal, Pritam Halder, A. Sende·Feb 25, 2025
We explore the performance of the metrology scheme by employing a quantum time flip during encoding, a specific case of processes with indefinite time direction, which we refer to as indefinite time directed metrology (ITDM). In the case of single pa...
Quantum-Safe integration of TLS in SDN networks
Jaime S. Buruaga, Rub'en B. M'endez, J. P. Brito +1 more·Feb 24, 2025
Shor's algorithm efficiently solves factoring and discrete logarithm problems using quantum computers, compromising all public key schemes used today. These schemes rely on assumptions on their computational complexity, which quantum computers can ea...
Information-theoretic principle of emergent 1-form symmetries
Yu-Jie Liu, Wen-Tao Xu, Frank Pollmann +1 more·Feb 24, 2025
Higher-form symmetries act on sub-dimensional spatial manifolds of a quantum system. They can emerge as an exact symmetry at low energies even when they are explicitly broken at the microscopic level, making them difficult to characterize. In this wo...
Beyond NISQ: The Megaquop Machine
J. Preskill·Feb 24, 2025
Today’s Noisy Intermediate-Scale Quantum (NISQ) computers have scientific value, but quantum machines with broad practical value must be protected against noise using quantum error correction and fault-tolerant protocols. Recent studies of quantum er...
Existence and Characterisation of Bivariate Bicycle Codes
Jasper Johannes Postema, Servaas J. J. M. F. Kokkelmans·Feb 24, 2025
Encoding quantum information in a quantum error correction (QEC) code offers protection against decoherence and enhances the fidelity of qubits and gate operations. One of the fundamental challenges of QEC is to construct codes with asymptotically go...
Adaptive Non-Gaussian Quantum State Engineering
Valerio Crescimanna, Shang Yu, Khabat Heshami +1 more·Feb 20, 2025
Non-Gaussian quantum states of bosons are a key resource in quantum information science with applications ranging from quantum metrology to fault-tolerant quantum computation. Generation of photonic non-Gaussian resource states, such as Schrödinger's...
Quantum computer formulation of the FKP-operator eigenvalue problem for probabilistic learning on manifolds
Christian Soize, Loïc Joubert-Doriol, A. Izmaylov·Feb 20, 2025
We present a quantum computing formulation to address a challenging problem in the development of probabilistic learning on manifolds (PLoM). It involves solving the spectral problem of the high-dimensional Fokker-Planck (FKP) operator, which remains...
Adaptive syndrome extraction
Noah F. Berthusen, Shi Jie Samuel Tan, Eric Huang +1 more·Feb 20, 2025
Device error rates on current quantum computers have improved enough to where demonstrations of error correction below break-even are now possible. Still, the circuits required for quantum error correction introduce significant overhead and sometimes...
Discovering highly efficient low-weight quantum error-correcting codes with reinforcement learning
Austin Yubo He, Zi-Wen Liu·Feb 20, 2025
The realization of scalable fault-tolerant quantum computing is expected to hinge on quantum error-correcting codes. In the quest for more efficient quantum fault tolerance, a critical code parameter is the weight of measurements that extract informa...
Provable Quantum Algorithm Advantage for Gaussian Process Quadrature
Cristian A. Galvis-Florez, Ahmad Farooq, Simo Särkkä·Feb 20, 2025
The aim of this paper is to develop novel quantum algorithms for Gaussian process quadrature methods. Gaussian process quadratures are numerical integration methods where Gaussian processes are used as functional priors for the integrands to capture ...
PQBFL: A Post-Quantum Blockchain-based Protocol for Federated Learning
Hadi Gharavi, J. Granjal, Edmundo Monteiro·Feb 20, 2025
One of the goals of Federated Learning (FL) is to collaboratively train a global model using local models from remote participants. However, the FL process is susceptible to various security challenges, including interception and tampering models, in...
Measurement-device-independent Schmidt number certification of all entangled states
Saheli Mukherjee, Bivas Mallick, Arun Kumar Das +2 more·Feb 18, 2025
Bipartite quantum states with higher Schmidt numbers have been shown to outperform those with lower Schmidt numbers in various quantum information processing tasks, highlighting the operational advantage of entanglement dimensionality. Certifying the...
Observable and computable entanglement in time
Alexey Milekhin, Zofia Adamska, John Preskill·Feb 17, 2025
We propose a novel family of entanglement measures for time-separated subsystems. Our definitions are applicable to any quantum system, continuous or discrete. To illustrate their utility, we derive upper and lower bounds on time-separated correlatio...
Unitality Conditions on Subsystems in Quantum Dynamics
Anumita Mukhopadhyay, Shibdas Roy, A. K. Pati·Feb 17, 2025
It is known that non-unital noise such as the amplitude damping can sometimes increase quantum correlations, while unital noise such as the dephasing usually decreases quantum correlations. It is, therefore, important to delineate the conditions, whe...