Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Replica Keldysh field theory of quantum-jump processes: General formalism and application to imbalanced and inefficient fermion counting
Felix Kloiber-Tollinger, Lukas M. Sieberer·Dec 18, 2025
Measurement-induced phase transitions have largely been explored for projective or continuous measurements of Hermitian observables, assuming perfect detection without information loss. Yet such transitions also arise in more general settings, includ...
Amplifying Decoherence-Free Many-Body Interactions with Giant Atoms Coupled to Parametric Waveguide
Xin Wang, Zhao-Min Gao·Dec 18, 2025
Parametric amplification offers a powerful means to enhance quantum interactions through field squeezing, yet it typically introduces additional noise which accelerates quantum decoherence, a major obstacle for scalable quantum information processing...
Silicon T centre hyperfine structure and memory protection schemes
Nicholas Brunelle, Joshua Kanaganayagam, Mehdi Keshavarz +11 more·Dec 18, 2025
Combining the long-coherence of spin qubits and the capability to transmit information and entanglement through photons, spin-photon interfaces (SPIs) are a promising platform for networked quantum computation and long-distance quantum communication....
A Dough-Like Model for Understanding Double-Slit Phenomena
Ping-Rui Tsai, Tzay-Ming Hong·Dec 17, 2025
The probabilistic interference fringes observed in the double slit experiment vividly demonstrate the quantum superposition principle, yet they also highlight a fundamental conceptual challenge: the relationship between a system before and after the ...
On the power of moving quantum sensors: fully flexible and noise-resilient sensing
Paul Aigner, Wolfgang Dür·Dec 17, 2025
We show that a single moving quantum sensor provides complete access to spatially correlated scalar fields. We demonstrate that with either trajectory or internal state control, one can selectively measure any linear functional, e.g. a gradient or a ...
Solvable Quantum Circuits from Spacetime Lattices
Michael A. Rampp, Suhail A. Rather, Pieter W. Claeys·Dec 17, 2025
In recent years dual-unitary circuits and their multi-unitary generalizations have emerged as exactly solvable yet chaotic models of quantum many-body dynamics. However, a systematic picture for the solvability of multi-unitary dynamics remains missi...
Characterization of Generalized Coherent States through Intensity-Field Correlations
Ignacio Salinas Valdivieso, Victor Gondret, Gerd Hartmann S. +3 more·Dec 17, 2025
Non-Gaussian quantum states of light are essential resources for quantum information processing and precision metrology. Among them, generalized coherent states (GCS), which naturally arise from the evolution of a coherent state with a nonlinear medi...
Optimization Techniques in Quantum Information
Benjamin Desef·Dec 17, 2025
This thesis focuses on the intersection of mathematical and computational optimization and quantum information. Main contributions are open-source software code: A hybrid approach mixing "traditional" nonconvex and convex methods can make difficult p...
Implementation of the Quantum Fourier Transform on a molecular qudit with full refocusing and state tomography
Marcos Rubín-Osanz, Laura Bersani, Simone Chicco +7 more·Dec 17, 2025
Molecular spin qudits based on lanthanide complexes offer a promising platform for quantum technologies, combining chemical tunability with multi-level encoding. However, experimental demonstrations of their envisaged capabilities remain scarce, posi...
Photonics-Enhanced Graph Convolutional Networks
Yuan Wang, Oleksandr Kyriienko·Dec 17, 2025
Photonics can offer a hardware-native route for machine learning (ML). However, efficient deployment of photonics-enhanced ML requires hybrid workflows that integrate optical processing with conventional CPU/GPU based neural network architectures. He...
Energy Inference of Black-Box Quantum Computers Using Quantum Speed Limit
Nobumasa Ishida, Yoshihiko Hasegawa·Dec 17, 2025
Cloud-based quantum computers do not provide users with access to hardware-level information such as the underlying Hamiltonians, which obstructs the characterization of their physical properties. We propose a method to infer the energy scales of gat...
The inverse parametric problem
Michele Cortinovis, Fabio Lingua, David B. Haviland·Dec 17, 2025
We present a method to calculate the frequency components of a pump waveform driving a parametric oscillator, which realizes a desired frequency mixing or scattering between modes. The method is validated by numerical analysis and we study its sensit...
Characterizing Fisher information of quantum measurement
Rakesh Saini, Jukka Kiukas, Daniel Burgarth +1 more·Dec 17, 2025
Informationally complete measurements form the foundation of universal quantum state reconstruction, while quantum parameter estimation is based on the local structure of the manifold of quantum states. Here we establish a general link between these ...
Quditto: Emulating and Orchestrating Distributed QKD Network Deployments
Blanca Lopez, Angela Diaz-Bricio, Javier Perez +2 more·Dec 17, 2025
Quantum Key Distribution (QKD) offers information-theoretic security by leveraging quantum mechanics, yet the cost and complexity of dedicated hardware and fiber infrastructure have so far limited large-scale deployment and experimentation. In this p...
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...
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...
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...
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 ...
Microscopic model for a spatial multimode generation based on Multi-pump Four Wave Mixing in hot vapours
H. M. Florez·Dec 17, 2025
Multipartite entanglement is an important resource for quantum information processing. It has been shown that it is possible to employ alkali atoms to implement single device multipartite entanglement by using nonlinear processes with spatial modes. ...