Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Amplitude-amplified coherence detection and estimation
Rhea Alexander, Michalis Skotiniotis, Daniel Manzano·Dec 17, 2025
The detection and characterization of quantum coherence is of fundamental importance both in the foundations of quantum theory as well as for the rapidly developing field of quantum technologies, where coherence has been linked to quantum advantage. ...
A Quantum Bluestein's Algorithm for Arbitrary-Size Quantum Fourier Transform
Nan-Hong Kuo, Renata Wong·Dec 17, 2025
We propose a quantum analogue of Bluestein's algorithm (QBA) that implements an exact $N$-point Quantum Fourier Transform (QFT) for arbitrary $N$. Our construction factors the $N$-dimensional QFT unitary into three diagonal quadratic-phase gates and ...
Wigner Cat Phases: A finely tunable system for exploring the transition to quantum chaos
M. Süzen·Dec 17, 2025
A quantum mechanical setting consisting of a frozen qubit composed with a fully thermalized chaotic system of N states is proposed, with potential relevance to quantum control. Observing the states of the composed system selectively retaining the sta...
Integrated on-chip quantum light sources on a van der Waals platform
Pietro Metuh, Paweł Wyborski, Athanasios Paralikis +4 more·Dec 17, 2025
Scalable photonic quantum information technologies require a platform combining quantum light sources, waveguides, and detectors on a single chip. Here, we introduce a van der Waals platform comprising strain-engineered bilayer WSe$_2$ quantum emitte...
Wave-packet dynamics in pseudo-Hermitian lattices: Coexistence of Hermitian and non-Hermitian wavefronts
Alon Beck, Moshe Goldstein·Dec 17, 2025
This paper investigates wave-packet dynamics in non-Hermitian lattice systems and reveals a surprising phenomenon: The simultaneous propagation of two distinct wavefronts, one traveling at the non-Hermitian velocity and the other at the Hermitian vel...
Practical Challenges in Executing Shor's Algorithm on Existing Quantum Platforms
Paul Bagourd, Julian Jang-Jaccard, Vincent Lenders +3 more·Dec 17, 2025
Quantum computers pose a fundamental threat to widely deployed public-key cryptosystems, such as RSA and ECC, by enabling efficient integer factorization using Shor's algorithm. Theoretical resource estimates suggest that 2048-bit RSA keys could be b...
Continuous-mode analysis for practical continuous-variable quantum key distribution
Yanhao Sun, Jiayu Ma, Xiangyu Wang +3 more·Dec 17, 2025
Continuous-variable quantum key distribution (CV-QKD) enables two remote parties to establish information-theoretically secure keys and offers high practical feasibility due to its compatibility with mature coherent optical communication technologies...
Decoherence in the Pure Dephasing Spin-Boson Model with Hermitian or Non-Hermitian Bath
Yue-Hong Wu, Ning-Hua Tong·Dec 17, 2025
In this paper, we investigate the decoherence of qubit due to its coupling to a Hermitian or a non-Hermitian bath within the pure dephasing spin-boson model. First, using this model, we analytically establish the previously anticipated similarity bet...
Two-Body Kapitza-Dirac Scattering of One-Dimensional Ultracold Atoms
André Becker, Georgios M. Koutentakis, Peter Schmelcher·Dec 17, 2025
Kapitza-Dirac scattering, the diffraction of matter waves from a standing light field, is widely utilized in ultracold gases, but its behavior in the strongly interacting regime is an open question. Here we develop a numerically-exact two-body descri...
Quantum Mpemba effect in Local Gauge Symmetry Restoration
Hao-Yue Qi, Wei Zheng·Dec 17, 2025
Understanding relaxation in isolated quantum many-body systems remains a central challenge. Recently, the quantum Mpemba effect (QME), a counterintuitive relaxation phenomenon, has attracted considerable attention and has been extensively studied in ...
Quantum Dynamics of a Nanorotor Driven by a Magnetic Field
V. N. Binhi·Dec 17, 2025
A molecular rotor mechanism is proposed to explain weak magnetic field effects in biology. Despite being nanoscale (1 nm), this rotor exhibits quantum superposition and interference. Analytical modeling shows its quantum dynamics are highly sensitive...
Sharing quantum indistinguishability with multiple parties
Lemieux Wang, Hanwool Lee, Joonwoo Bae +1 more·Dec 17, 2025
Quantum indistinguishability of non-orthogonal quantum states is a valuable resource in quantum information applications such as cryptography and randomness generation. In this article, we present a sequential state-discrimination scheme that enables...
Composite N-Q-S: Serial/Parallel Instrument Axioms, Bipartite Order-Effect Bounds, and a Monitored Lindblad Limit
Kazuyuki Yoshida·Dec 17, 2025
We develop a composite operational architecture for sequential quantum measurements that (i) gives a tight bipartite order-effect bound with an explicit equality set characterized on the Halmos two-subspace block, (ii) upgrades Doeblin-type minorizat...
Dynamics and steady states of tight-binding chains in presence of isolated defects
Anish Acharya, Luca Giuggioli, Shamik Gupta·Dec 17, 2025
Reduced transport and localization in isolated quantum systems are typically attributed to spatially-extended disorder, but may also emerge from the influence of a few controllable defects. We show here how a single defect profoundly reshapes wave-fu...
Universal Blind Quantum Computation with Recursive Rotation Gates
Mohit Joshi, Manoj Kumar Mishra, S. Karthikeyan·Dec 17, 2025
Blind Quantum Computation lets a limited-capability client delegate its complex computation to a remote server without revealing its data or computation. Several such protocols have been proposed under varied quantum computing models. However, these ...
Exponential convergence dynamics in Grover's search algorithm
Samuel Cogan, Jonathan Raghoonanan, Tim Byrnes·Dec 17, 2025
Grover's search algorithm is the cornerstone of many applications of quantum computing, providing a quadratic speed-up over classical methods. One limitation of the algorithm is that it requires knowledge of the number of solutions to obtain an optim...
Quantum data hiding with two-qubit separable states
Donghoon Ha, Jeong San Kim·Dec 17, 2025
We consider the discrimination of two-party quantum states and provide a quantum data-hiding scheme using two-qubit separable states. We first provide a bound on the optimal local discrimination of two-party quantum states, and establish a sufficient...
Coherent transfer via parametric control of normal-mode splitting in a superconducting multimode resonator
Kai-I Chu, Xiao-Cheng Lu, Hsin Chang +5 more·Dec 17, 2025
Microwave storage and retrieval are essential capabilities for superconducting quantum circuits. Here, we demonstrate an on-chip multimode resonator in which strong parametric modulation induces a large and tunable normal-mode splitting that enables ...
Quantum Batteries in Coherent Ising Machine
Jin-Tian Zhang, Shuang-Quan Ma, Jing-Yi-Ran Jin +1 more·Dec 17, 2025
With intensive studies of quantum thermodynamics, the quantum batteries (QBs) have been proposed to store and transfer energy via quantum effects. Despite many theoretical models, decoherence remains a severe challenge and practical platforms are sti...
Bosonic quantum computing with near-term devices and beyond
Timo Hillmann·Dec 17, 2025
(Abridged.) This thesis investigates scalable fault-tolerant quantum computation through the development of bosonic quantum codes, quantum LDPC codes, and decoding protocols that connect continuous-variable and discrete-variable error correction. We ...