Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Theoretical Guarantees of Variational Quantum Algorithm with Guiding States
Tuyen Nguyen, Mária Kieferová·Oct 8, 2025
Variational quantum algorithms (VQAs) are prominent candidates for near-term quantum advantage but lack rigorous guarantees of convergence and generalization. By contrast, quantum phase estimation (QPE) provides provable performance under the guiding...
Constant-Overhead Addressable Gates via Single-Shot Code Switching
Louis Golowich, Kathleen Chang, Guanyu Zhu·Oct 8, 2025
It is a major challenge to perform addressable and parallel logical operations on constant-rate quantum LDPC (qLDPC) codes. Indeed, the overhead of targeting specific logical qubits represents a crucial bottleneck in many quantum fault-tolerance sche...
Fast-forwardable Lindbladians imply quantum phase estimation
Zhong-Xia Shang, Naixu Guo, Patrick Rebentrost +3 more·Oct 8, 2025
Quantum phase estimation (QPE) and Lindbladian dynamics are both foundational in quantum information science and central to quantum algorithm design. In this work, we bridge these two concepts: certain simple Lindbladian processes can be adapted to p...
Advantages of Global Entanglement-Distillation Policies in Quantum Repeater Chains
Iftach Yakar, Michael Ben-Or·Oct 8, 2025
Quantum repeaters are essential for achieving long-distance quantum communication due to photon loss, which grows exponentially with the channel distance. Current quantum repeater generations use entanglement distillation protocols, where the decisio...
Continuous measurement-based holonomic quantum computation
Anirudh Lanka, Juan Garcia-Nila, Todd A. Brun·Oct 8, 2025
We propose a scheme to generate holonomies using the Quantum Zeno effect, enabling logical unitary operations on quantum stabilizer codes purely through measurements. The quantum error-correcting code space is adiabatically rotated by measuring a suc...
State preparation and symmetries
Ivana Miháliková, Joseph Carlson, Duff Neill +1 more·Oct 8, 2025
We demonstrate the importance of symmetries in Variational Quantum Eigensolver (VQE) algorithms to prepare the ground or specific low-lying states of quantum Hamiltonians. We examine two spin problems, one with random all-to-all couplings inspired by...
Layer codes as partially self-correcting quantum memories
Shouzhen Gu, Libor Caha, Shin Ho Choe +3 more·Oct 8, 2025
We investigate layer codes, a family of three-dimensional stabilizer codes that can achieve optimal scaling of code parameters and a polynomial energy barrier, as candidates for self-correcting quantum memories. First, we introduce two decoding algor...
Postselected amplification and photon recycling applied to optical sensing of magnetic fields
Yazhi Niu, Jialin Li, Lupei Qin +1 more·Oct 8, 2025
We apply the combined technique of postselected amplification and photon-recycling to an optical setup of magnetic field precision measurement. We propose two recycling schemes and carry out analytic expressions for the amplified signal and measureme...
Algebraic Geometry Codes and Decoded Quantum Interferometry
Andi Gu, Stephen P. Jordan·Oct 8, 2025
Decoded Quantum Interferometry (DQI) defines a duality that pairs decoding problems with optimization problems. The original work on DQI considered Reed-Solomon decoding, whose dual optimization problem, called Optimal Polynomial Intersection (OPI), ...
Hyperinvariant Spin Network States -- An AdS/CFT Model from First Principles
Fynn Otto, Refik Mansuroglu, Norbert Schuch +2 more·Oct 8, 2025
We study the existence and limitations for hyperinvariant tensor networks incorporating a local SU(2) symmetry. As discrete implementations of the anti de-Sitter/conformal field theory (AdS/CFT) correspondence, such networks have created bridges betw...
Excitonic Insulator and Possible Superfluid Based on Two-Dimensional Diamond
Shisheng Lin, Shaoqi Huang, Minhui Yang +3 more·Oct 8, 2025
Recent research on excitonic insulator has progressed mainly based on narrow bandgap semiconductor or semimetal. Herein, we realize excitonic insulator based on two-dimensional (2D) wide band gap diamond with transition temperature as high as 220K. T...
Adapting Quantum Machine Learning for Energy Dissociation of Bonds
Swathi Chandrasekhar, Shiva Raj Pokhrel, Navneet Singh·Oct 8, 2025
Accurate prediction of bond dissociation energies (BDEs) underpins mechanistic insight and the rational design of molecules and materials. We present a systematic, reproducible benchmark comparing quantum and classical machine learning models for BDE...
Twisted locality-preserving automorphisms, anomaly index, and generalized Lieb-Schultz-Mattis theorems with anti-unitary symmetries
Ruizhi Liu, Jinmin Yi, Liujun Zou·Oct 8, 2025
Symmetries and their anomalies are powerful tools to understand quantum matter. In this work, for quantum spin chains, we define twisted locality-preserving automorphisms and their Gross-Nesme-Vogts-Werner indices, which provide a unified framework t...
Optimal filtering and generation of entangled photons for quantum applications in the presence of noise
Jordan M. Thomas, Andrew R. Cameron, Akil Pathiranage +6 more·Oct 8, 2025
Filtering is commonly used in quantum optics to reject noise photons, and also to enable interference between independent photons. However, filtering the joint spectrum of photon pairs can reduce the inherent coincidence probability or loss-independe...
CLAQS: Compact Learnable All-Quantum Token Mixer with Shared-ansatz for Text Classification
Junhao Chen, Yifan Zhou, Hanqi Jiang +6 more·Oct 8, 2025
Quantum compute is scaling fast, from cloud QPUs to high throughput GPU simulators, making it timely to prototype quantum NLP beyond toy tasks. However, devices remain qubit limited and depth limited, training can be unstable, and classical attention...
Approximate maximum likelihood decoding with $K$ minimum weight matchings
Mao Lin·Oct 8, 2025
The minimum weight matching (MWM) and maximum likelihood decoding (MLD) are two widely used and distinct decoding strategies for quantum error correction. For a given syndrome, the MWM decoder finds the most probable physical error corresponding to t...
Quantum-enhanced Computer Vision: Going Beyond Classical Algorithms
N. Meli, Shuteng Wang, Marcel Seelbach Benkner +5 more·Oct 8, 2025
Quantum-enhanced Computer Vision (QeCV) is a new research field at the intersection of computer vision, optimisation theory, machine learning and quantum computing. It has high potential to transform how visual signals are processed and interpreted w...
Pareto-optimality of Majoranas in hybrid platforms
Juan Daniel, Torres Luna, Sebastian Miles +5 more·Oct 8, 2025
To observe Majorana bound states, and especially to use them as a qubit, requires careful optimization of competing quality metrics. We systematically compare Majorana quality in proximitized semiconductor nanowires and quantum dot chains. Using mult...
Simulating topological order on quantum processors
A. Gammon-Smith, M. Knap, F. Pollmann·Oct 8, 2025
It is an ongoing quest to realize topologically ordered quantum states on different platforms including condensed matter systems, quantum simulators and digital quantum processors. Unlike conventional states characterized by their local order, these ...
On the Pure Quantum Polynomial Hierarchy and Quantified Hamiltonian Complexity
Sabee Grewal, Dorian Rudolph·Oct 7, 2025
We prove several new results concerning the pure quantum polynomial hierarchy (pureQPH). First, we show that QMA(2) is contained in pureQSigma2, that is, two unentangled existential provers can be simulated by competing existential and universal prov...