Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Quantum Key Distribution
S. Kish, J. Pieprzyk, Seyit Ahmet Camtepe·Jul 31, 2025
Quantum Key Distribution (QKD) is a technology that ensures secure communication by leveraging the principles of quantum mechanics, such as the no-cloning theorem and quantum uncertainty. This chapter provides an overview of this quantum technology's...
Are controlled unitaries helpful?
Ewin Tang, John Wright·Jul 31, 2025
Many quantum algorithms, to compute some property of a unitary $U$, require access not just to $U$, but to $cU$, the unitary with a control qubit. We show that having access to $cU$ does not help for a large class of quantum problems. For a quantum c...
Intrinsic heralding and optimal decoders for non-Abelian topological order
D. Jing, Pablo Sala, Liang Jiang +1 more·Jul 31, 2025
Topological order (TO) provides a natural platform for storing and manipulating quantum information. However, its stability to noise has only been systematically understood for Abelian TOs. In this work, we exploit the non-deterministic fusion of non...
Local-available quantum correlation swapping in one-parameter X states
Hermann L. Albrecht·Jul 30, 2025
Although introduced for entanglement, quantum repeaters and swapping protocols have been analyzed for other quantum correlations (QC), such as quantum discord. In 2015, Mundarain and Ladrón de Guevara [Quantum Inf. Process. 14, 4493 (2015)] introduce...
Density Operator Expectation Maximization
Adit Vishnu, Abhay Shastry, Dhruva Kashyap +1 more·Jul 30, 2025
Machine learning with density operators, the mathematical foundation of quantum mechanics, is gaining prominence with rapid advances in quantum computing. Generative models based on density operators cannot yet handle tasks that are routinely handled...
Minimizing entanglement entropy for enhanced quantum state preparation
Oskari Kerppo, William Steadman, Ossi Niemimäki +1 more·Jul 30, 2025
Quantum state preparation is an important subroutine in many quantum algorithms. The goal is to encode classical information directly to the quantum state so that it is possible to leverage quantum algorithms for data processing. However, quantum sta...
Enhanced Prediction of CAR T-Cell Cytotoxicity with Quantum-Kernel Methods
F. Utro, Meltem Tolunay, Kahn Rhrissorrakrai +6 more·Jul 30, 2025
Chimeric antigen receptor (CAR) T-cells are T-cells engineered to recognize and kill specific tumor cells. Through their extracellular domains, CAR T-cells bind tumor cell antigens which triggers CAR T activation and proliferation. These processes ar...
Programmable Microwave Cluster States via Josephson Metamaterials
A. Alocco, A. Celotto, E. Palumbo +5 more·Jul 30, 2025
Cluster states are a fundamental resource for continuous-variable quantum computing, enabling measurement-based protocols that can scale beyond the limitations of qubit-based architectures. Here, we demonstrate on-demand generation of multimode entan...
Single‐ and Two‐Mode Squeezing by Modulated Coupling to a Rabi Driven Qubit
E. Blumenthal, Nir Gutman, I. Kaminer +1 more·Jul 30, 2025
Advanced bosonic quantum computing architectures demand nonlocal Gaussian operations such as two‐mode squeezing to unlock universal control, enable entanglement generation, and implement logical operations across distributed modes. This work presents...
Analysis of Quantum Image Representations for Supervised Classification
Marco Parigi, Mehran Khosrojerdi, Filippo Caruso +1 more·Jul 29, 2025
In the era of big data and artificial intelligence, the increasing volume of data and the demand to solve more and more complex computational challenges are two driving forces for improving the efficiency of data storage, processing and analysis. Qua...
Structured quantum learning via em algorithm for Boltzmann machines
Takeshi Kimura, Kohtaro Kato, Masahito Hayashi·Jul 29, 2025
Quantum Boltzmann machines (QBMs) are generative models with potential advantages in quantum machine learning, yet their training is fundamentally limited by the barren plateau problem, where gradients vanish exponentially with system size. We introd...
Security loophole in error verification in quantum key distribution
T. Tsurumaru, Akihiro Mizutani, Toshihiko Sasaki·Jul 29, 2025
The security of quantum key distribution (QKD) is evaluated based on the secrecy of Alice's key and the correctness of the keys held by Alice and Bob. A practical method for ensuring correctness is known as error verification, in which Alice and Bob ...
Construction and Rigorous Analysis of Quantum-Like States
Ethan Dickey, Abhijeet Vyas, Sabre Kais·Jul 28, 2025
Extending upon the observations of the emergence of quantum-like states from classical complex synchronized networks, this work adds mathematical rigor to the analysis of single Quantum-Like (QL) bits constructed by eigenvectors of the adjacency matr...
Robust qubit interactions mediated by photonic topological edge states
Boris Gurevich, Weihua Xie, Mohsen Yarmohammadi +1 more·Jul 28, 2025
We investigate the coupling of two spatially separated qubits via topologically protected edge states in a two-dimensional Hofstadter lattice. In this hybrid platform, the qubits are coupled to distinct edge sites of the lattice, enabling long-range ...
Witness High-Dimensional Quantum Steering via Majorization Lattice
Ma-Cheng Yang, Cong-Feng Qiao·Jul 28, 2025
Quantum steering enables one party to influence another remote quantum state by local measurement. While steering is fundamental to many quantum information tasks, the existing detection methods in the literature are mainly constrained to either spec...
Planckian bound on quantum dynamical entropy
Xiangyu Cao·Jul 28, 2025
We introduce a simplified version of Connes-Narnhofer-Thirring's quantum dynamical entropy for quantum systems. It quantifies the amount of information gained about the initial condition from continuously monitoring an observable. A nonzero entropy g...
On Post-Quantum Cryptography Authentication for Quantum Key Distribution
Juan Antonio Vieira Giestinhas, T. Spiller·Jul 28, 2025
The traditional way for a Quantum Key Distribution (QKD) user to join a quantum network is by authenticating themselves using pre-shared key material. While this approach is sufficient for small-scale networks, it becomes impractical as the network g...
Efficient Gaussian State Preparation in Quantum Circuits
Yichen Xie, Nadav Ben-Ami·Jul 27, 2025
Gaussian states hold a fundamental place in quantum mechanics, quantum information, and quantum computing. Many subfields, including quantum simulation of continuousvariable systems, quantum chemistry, and quantum machine learning, rely on the abilit...
Finite-Size Effects in Quantum Metrology at Strong Coupling: Microscopic vs Phenomenological Approaches
Ali Pedram, Özgür E. Müstecaplıoğlu·Jul 26, 2025
We study the ultimate precision limits of a spin chain, strongly coupled to a heat bath, for measuring a general parameter and report the results for specific cases of magnetometry and thermometry. Employing a full polaron transform, we derive the ef...
An Efficient Alternating Minimization Algorithm for Computing Quantum Rate-Distortion Function
Lingyi Chen, Deheng Yuan, Wen-Ying Zhang +2 more·Jul 26, 2025
We consider the computation of the entanglement-assisted quantum rate-distortion function, which plays a central role in quantum information theory. We propose an efficient alternating minimization algorithm based on the Lagrangian analysis. Instead ...