Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Weighted graph states as a resource for quantum metrology
B. J. Alexander, Ş. K. Özdemir, M. S. Tame·Feb 13, 2026
Quantum metrology exploits quantum mechanical effects to increase the precision of measurements of physical quantities. A wide variety of applications are currently being developed for scientific and technological purposes, however, most research rel...
Effective classical potential for quantum statistical averages
Vijay Ganesh Sadhasivam, Stuart C. Althorpe, Venkat Kapil·Feb 13, 2026
We present an effective potential that allows quantum thermal expectation values of a position-dependent observable to be estimated as a classical ensemble average of the corresponding function. We follow the approach of Feynman and Hibbs, but perfor...
Quantum metrology with partially accessible chaotic sensors
Harshita Sharma, Sayan Choudhury, Jayendra N. Bandyopadhyay·Feb 13, 2026
Most quantum metrology protocols harness highly entangled probe states and globally accessible measurements to surpass the standard quantum limit. However, it is challenging to satisfy these requirements in realistic many-body sensors. We demonstrate...
Quantum logic control and entanglement in hybrid atom-molecule arrays
Chi Zhang, Sara Murciano, Nathanan Tantivasadakarn +1 more·Feb 13, 2026
Polar molecules, with their rich internal structure, offer immense potential for fundamental physics, quantum technology, and controlled chemistry. However, their utilization is currently limited because of slow and imperfect state detection and weak...
Airline Fleet Assignment Problems with Binary and Integer Programming models: Classical vs Quantum Annealing
Kuntal Adak, Sakshi Kaushik, Rahul Rana·Feb 13, 2026
This research highlights the potential of quantum annealing in tackling large-scale optimization problems within the airline industry,demonstrating its efficiency for certain problem sizes while also acknowledging its current limitations. The compara...
Optimized Compilation of Logical Clifford Circuits
Alexander Popov, Nico Meyer, Daniel D. Scherer +1 more·Feb 13, 2026
Fault-tolerant quantum computing hinges on efficient logical compilation, in particular, translating high-level circuits into code-compatible implementations. Gate-by-gate compilation often yields deep circuits, requiring significant overhead to ensu...
Towards Trapped-Ion Thermometry Using Cavity-Based EIT
Abhijit Kundu, Vijay Bhatt, Arijit Sharma·Feb 13, 2026
We present a technique for measuring ion temperature using cavity-based electromagnetically induced transparency (EIT) applicable for cavity QED systems. This method enables efficient extraction of the ion's phonon occupation number following sub-Dop...
Equilibrium thermometry in the multilevel quantum Rabi model
Tabitha Doicin, Luis A. Correa, Jonas Glatthard +2 more·Feb 13, 2026
The temperature sensitivity of a probe in equilibrium can be gauged by its thermal quantum Fisher information (QFI). It is known that probes exhibiting degeneracy in their energy-level structure can achieve larger sensitivities, while probes with a m...
Design and Operation of Wafer-Scale Packages Containing >500 Superconducting Qubits
Oscar W. Kennedy, Waqas Ahmad, Robert Armstrong +14 more·Feb 13, 2026
Packages capable of supporting large arrays of high-coherence superconducting qubits are vital for the realisation of fault-tolerant quantum computers and the necessary high-throughput metrology required to optimise fabrication and manufacturing proc...
Preparing Quantum Backflow States by Large Momentum Transfer
Yuchong Chen, Yijun Tang·Feb 13, 2026
A quantum backflow state refers to a quantum state exhibiting negative probability density flux albeit a completely positive momentum spectrum. Extending earlier work that uses single laser pulse to prepare quantum backflow state in an ultracold atom...
Fractional $k$-positivity: a continuous refinement of the $k$-positive scale
Mohsen Kian·Feb 13, 2026
We introduce a real-parameter refinement of the classical integer hierarchies underlying Schmidt number, block-positivity, and $k$-positivity for maps between matrix algebras. Starting from a compact family of $α$-admissible unit vectors ($α\in[1,d]$...
Reverse Delegated Training and Private Inference via Perfectly-Secure Quantum Homomorphic Encryption
Sergio A. Ortega, Miguel A. Martin-Delgado·Feb 13, 2026
Quantum machine learning in cloud environments requires protecting sensitive data while enabling remote computation. Here we demonstrate the first realistic implementations of a perfectly-secure quantum homomorphic encryption (QHE) scheme applied to ...
QTabGAN: A Hybrid Quantum-Classical GAN for Tabular Data Synthesis
Subhangi Kumari, Rakesh Achutha, Vignesh Sivaraman·Feb 13, 2026
Synthesizing realistic tabular data is challenging due to heterogeneous feature types and high dimensionality. We introduce QTabGAN, a hybrid quantum-classical generative adversarial framework for tabular data synthesis. QTabGAN is especially designe...
Floquet implementation of a 3d fermionic toric code with full logical code space
Yoshito Watanabe, Bianca Bannenberg, Simon Trebst·Feb 13, 2026
Floquet quantum error-correcting codes provide an operationally economical route to fault tolerance by dynamically generating stabilizer structures using only two-body Pauli measurements. But while it is well established that stabilizer codes in high...
Sperner state and multipartite entanglement signals
Xin-Xiang Ju, Ya-Wen Sun, Yang Zhao·Feb 13, 2026
We establish a systematic classification scheme for multipartite entanglement structures. We define Sperner states -- a broad class of states where apparent multipartite entanglement decomposes into fewer-partite entanglement among subsystems of each...
Boundary mutual information in double holography
Yuxuan Liu, Yi Ling, Zhuo-Yu Xian·Feb 13, 2026
We consider a composite system where AdS$_3$ gravity is coupled to a flat heat bath and investigate the mutual information between two subregions on the intersection of the AdS$_3$ and bath, referred to as the boundary mutual information (BMI). The c...
Topology and edge modes surviving criticality in non-Hermitian Floquet systems
Longwen Zhou·Feb 13, 2026
The discovery of critical points that can host quantized nonlocal order parameters and degenerate edge modes relocate the study of symmetry-protected topological phases (SPTs) to gapless regions. In this letter, we reveal gapless SPTs (gSPTs) in syst...
Effects of magnonic Kerr nonlinearity on magnon-polaritons with a soft-mode
Takahiro Chiba·Feb 13, 2026
We theoretically study the effects of magnonic Kerr nonlinearity on magnon-polaritons (MPs) with a soft-mode in easy-axis ferromagnets coupled to a microwave cavity. Using an effective circuit model capable of describing MPs up to the nonperturbative...
Predicting properties of quantum thermal states from a single trajectory
Jiaqing Jiang, Jiaqi Leng, Lin Lin·Feb 13, 2026
Estimating thermal expectation values of observables is a fundamental task in quantum physics, quantum chemistry, and materials science. While recent quantum algorithms have enabled efficient quantum preparation of thermal states, observable estimati...
Compressed Sensing Shadow Tomography
Joseph Barreto, Daniel Lidar·Feb 13, 2026
Estimating many local expectation values over time is a central measurement bottleneck in quantum simulation and device characterization. We study the task of reconstructing the Pauli-signal matrix $S_{ij}=\text{Tr}(O_i ρ(t_j))$ for a collection of $...