Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Quantum inputs in the prepare-and-measure scenario and stochastic teleportation
Elna Svegborn, Jef Pauwels, Armin Tavakoli·Mar 31, 2025
We investigate prepare-and-measure scenarios in which a sender and a receiver use entanglement to send quantum information over a channel with limited capacity. We formalise this framework, identify its basic properties and provide numerical tools fo...
Coherent manipulation of interacting electron qubitson solid neon
Xinhao Li, Yizhong Huang, Xu Han +3 more·Mar 31, 2025
Electrons trapped on solid neon surfaces serve as low-noise charge qubits with long coherence times and high operational fidelities. Such charge qubits offer full electrical control and compact device footprints, convenient for scaling up with quantu...
Hamiltonian Dynamics Learning: A Scalable Approach to Quantum Process Characterization
Yusen Wu, Yukun Zhang, Chuan Wang +1 more·Mar 31, 2025
Quantum process characterization is a fundamental task in quantum information processing, yet conventional methods, such as quantum process tomography, require prohibitive resources and lack scalability. Here, we introduce an efficient quantum proces...
First-principles design of stable spin qubits in monolayer MoS2 with elemental defect engineering
Cailian Yu, Zhihua Zheng, Menghao Gao +3 more·Mar 31, 2025
Quantum information science, encompassing technologies such as quantum computing, sensing, and communication, relies on the development and manipulation of quantum bits (qubits). Recently, two-dimensional (2D) materials—characterized by their atomic ...
Quantum algorithms for cooling: A simple case study
Daniel Molpeceres, Sirui Lu, J. I. Cirac +1 more·Mar 31, 2025
Preparation of low-energy quantum many-body states has a wide range of applications in quantum information processing and condensed matter physics. Quantum cooling algorithms offer a promising alternative to other methods based, for instance, on vari...
Deformations of the symmetric subspace of qubit chains
Angel Ballesteros, Ivan Gutierrez-Sagredo, Jose de Ramon +1 more·Mar 30, 2025
The symmetric subspace of multi-qubit systems, that is, the space of states invariant under permutations, is commonly encountered in applications in the context of quantum information and communication theory. It is known that the symmetric subspace ...
Spatial Mode Encoding for Quantum Key Distribution: From Hundreds to Thousands of Modes
Lukas Scarfe, Yingwen Zhang, Ebrahim Karimi·Mar 28, 2025
Here, we present a proof-of-principle high-dimensional quantum key distribution (QKD) protocol utilizing the position and momentum entanglement of photon pairs. The protocol exploits the fact that position and momentum form mutually unbiased bases, l...
Circuit cutting with classical side information
C. Piveteau, Lukas Schmitt, David Sutter·Mar 28, 2025
Circuit cutting is a technique for simulating large quantum circuits by partitioning them into smaller subcircuits, which can be executed on smaller quantum devices. The results from these subcircuits are then combined in classical post-processing to...
Feedback Connections in Quantum Reservoir Computing with Mid-Circuit Measurements
Jakob Murauer, R. Krishnakumar, Sabine Tornow +1 more·Mar 28, 2025
Existing approaches to quantum reservoir computing can be broadly categorized into restart-based and continuous protocols. Restart-based methods require reinitializing the quantum circuit for each time step, while continuous protocols use mid-circuit...
The moment polytope of matrix multiplication is not maximal
Maxim van den Berg, Matthias Christandl, Vladimir Lysikov +3 more·Mar 28, 2025
Moment polytopes of tensors, the study of which is deeply rooted in invariant theory, representation theory and symplectic geometry, have found relevance in numerous places, from quantum information (entanglement polytopes) and algebraic complexity t...
Quantum Doeblin Coefficients: Interpretations and Applications
Ian George, Christoph Hirche, Theshani Nuradha +1 more·Mar 28, 2025
In classical information theory, the Doeblin coefficient of a classical channel provides an efficiently computable upper bound on the total-variation contraction coefficient of the channel, leading to what is known as a strong data-processing inequal...
Differential equation quantum solvers: engineering measurements to reduce cost
Annie E. Paine, Casper Gyurik, A. A. Gentile·Mar 28, 2025
Quantum computers have been proposed as a solution for efficiently solving non-linear differential equations (DEs), a fundamental task across diverse technological and scientific domains. However, a crucial milestone in this regard is to design proto...
Parameter estimation with one- and two-time measurements on the emission field of the boundary time crystal
Albert Cabot, Federico Carollo, Igor Lesanovsky·Mar 27, 2025
Many-body quantum systems can exhibit collective effects that enhance the sensitivity of parameter estimation protocols. An example is provided by resonantly driven two-level atoms subject to collective dissipation, which can display a transition bet...
Information Theoretic One-Time Programs from Geometrically Local QNC0 Adversaries
Lev Stambler·Mar 27, 2025
We show how to construct simulation secure one-time memories, and thus one-time programs, without computational assumptions in the presence of constraints on quantum hardware. Specifically, we build one-time memories from random linear codes and quan...
Covert Entanglement Generation and Secrecy
Ohad Kimelfeld, Boulat A. Bash, Uzi Pereg·Mar 26, 2025
We determine the covert capacity for entanglement generation over a noisy quantum channel. While secrecy guarantees that the transmitted information remains inaccessible to an adversary, covert communication ensures that the transmission itself remai...
Fast and Noise-aware Machine Learning Variational Quantum Eigensolver Optimiser
Akib Karim, Shaobo Zhang, Muhammad Usman·Mar 26, 2025
The Variational Quantum Eigensolver (VQE) is a hybrid quantum-classical algorithm for preparing ground states in the current era of noisy devices. The classical component of the algorithm requires a large number of measurements on intermediate parame...
High-efficiency vertical emission spin-photon interface for scalable quantum memories
Siavash Mirzaei-Ghormish, Jeddy Bennett, Ryan M. Camacho·Mar 25, 2025
We present an efficient spin-photon interface for free-space vertical emission coupling. Using a \rev{dipole model}, we show that our design achieves a far-field collection efficiency of 96\% at the numerical aperture of 0.7 with a 95\% overlap to a ...
Optomechanical quantum bus for donor spins in silicon
Henri Lyyra, Cliona Shakespeare, Simeoni Ahopelto +6 more·Mar 24, 2025
Silicon is the foundation of current information technology, and a promising platform for future quantum information technology as silicon-based qubits exhibit some of the longest coherence times in solid-state. At the same time, silicon is the under...
Almost device-independent calibration beyond Born’s rule: Bell tests for cross-talk detection
G. Tabia, A. Shih, Jin-Yuan Zheng +1 more·Mar 24, 2025
In quantum information, device-independent (DI) protocols offer a new approach to information processing tasks, making minimal assumptions about the devices used. Typically, since these protocols draw conclusions directly from the data collected in a...
Approximate Quantum Error Correction with 1D Log-Depth Circuits
Guoding Liu, Zhenyu Du, Zi-Wen Liu +1 more·Mar 22, 2025
Efficient and high-performance quantum error correction is essential for achieving fault-tolerant quantum computing. Low-depth random circuits offer a promising approach to identifying effective and practical encoding strategies. In this work, we rig...