Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Quantum Simulation of Protein Fragment Electronic Structure Using Moment-based Adaptive Variational Quantum Algorithms
Biraja Ghoshal·Jan 2, 2026
Background: Understanding electronic interactions in protein active sites is fundamental to drug discovery and enzyme engineering, but remains computationally challenging due to exponential scaling of quantum mechanical calculations. Results: We pres...
Computational Modeling of Exciton-bath Hamiltonians for LH2 and LH3 Complexes of Purple Photosynthetic Bacteria at Room Temperature
Daniel Montemayor, Eva Rivera, Seogjoo J. Jang·Jan 2, 2026
Light harvesting 2 (LH2) complex is a primary component of the photosynthetic unit of purple bacteria that is responsible for harvesting and relaying excitons. The electronic absorption line shape of LH2 contains two major bands at 800 nm and 850 nm ...
Nature is stingy: Universality of Scrooge ensembles in quantum many-body systems
Wai-Keong Mok, Tobias Haug, Wen Wei Ho +1 more·Jan 1, 2026
Recent advances in quantum simulators allow direct experimental access to ensembles of pure states generated by measuring part of an isolated quantum many-body system. These projected ensembles encode fine-grained information beyond thermal expectati...
Toward $\textit{Ab Initio}$ Quantum Simulations of Atomic Nuclei Using Noisy Qubits
Chongji Jiang, Junchen Pei, R. Hu +4 more·Jan 1, 2026
Quantum computers are expected to provide a ultimate solver for quantum many-body systems, although it is a tremendous challenge to achieve that goal on current noisy quantum devices. This work illustrated quantum simulations of ab initio no-core she...
Classical vs quantum dynamics and the onset of chaos in a macrospin system
Haowei Fan, Vladimir Fal'ko, Xiao Li·Dec 31, 2025
We study a periodically driven macrospin system with anisotropic long-range interactions and collective dissipation, described by a Lindblad master equation. In the thermodynamic limit ($N\to\infty$), a mean-field treatment yields classical equations...
Randomization Times under Quantum Chaotic Hamiltonian Evolution
Souradeep Ghosh, Nicholas Hunter-Jones, Joaquin F. Rodriguez-Nieva·Dec 31, 2025
Randomness generation through quantum-chaotic evolution underpins foundational questions in statistical mechanics and applications across quantum information science, including benchmarking, tomography, metrology, and demonstrations of quantum comput...
Parity order as a fundamental driver of bosonic topology
Ashirbad Padhan, Harsh Nigam·Dec 31, 2025
Symmetry-protected topological (SPT) phases in interacting bosonic systems have been widely explored, yet most realizations rely on fine-tuned interactions or enlarged symmetries. Here we show that a qualitatively simpler mechanism--parity order coup...
Numerical study of boson mixtures with multi-component continuous matrix product states
Wei Tang, Benoît Tuybens, Jutho Haegeman·Dec 31, 2025
The continuous matrix product state (cMPS) ansatz is a promising numerical tool for studying quantum many-body systems in continuous space. Although it provides a clean framework that allows one to directly simulate continuous systems, the optimizati...
Mathieu Control of the Effective Coupling in Superconducting Qubits
Yi-Han Yu, Xin-Yi Li, Kai Xu +1 more·Dec 31, 2025
A common challenge in superconducting quantum circuits is the trade-off between strong coupling and computational subspace integrity. We present Mathieu control, which uses a non-resonant two-photon drive to create a selective nonlinear frequency shi...
Continuous-variable quantum key distribution network based on entangled states of optical frequency combs
Hai Zhong, Qianqian Hu, Zhiyue Zuo +3 more·Dec 31, 2025
Continuous-variable quantum key distribution (CVQKD) features a high key rate and compatibility with classical optical communication. Developing expandable and efficient CVQKD networks will promote the deployment of large-scale quantum communication ...
Interfacing Atomic Spins with Photons for Quantum Metrology, Simulation and Computation
Monika Schleier-Smith·Dec 31, 2025
These lecture notes discuss applications of atom-light interactions in cavities to quantum metrology, simulation, and computation. A focus is on nonlocally interacting spin systems realized by coupling many atoms to a delocalized mode of light. We wi...
Probabilistic Computers for Neural Quantum States
Shuvro Chowdhury, Jasper Pieterse, Navid Anjum Aadit +2 more·Dec 31, 2025
Neural quantum states efficiently represent many-body wavefunctions with neural networks, but the cost of Monte Carlo sampling limits their scaling to large system sizes. Here we address this challenge by combining sparse Boltzmann machine architectu...
Three-Axis Spin Squeezed States Associated with Excited-State Quantum Phase Transitions
Chon-Fai Kam·Dec 30, 2025
Spin squeezing in collective atomic ensembles enables quantum-enhanced metrology by reducing noise below the standard quantum limit through nonlinear interactions. Extending the one-axis and two-axis twisting paradigms of Kitagawa and Ueda, we introd...
Incorporating multi-qubit exchange coupling effects between transmon qubits in Maxwell-Schrödinger numerical methods
Ghazi Khan, Thomas E. Roth·Dec 30, 2025
Superconducting qubits have emerged as a leading platform for realizing quantum computers. Accurate modeling of these devices is essential for predicting performance, improving design, and optimizing control. Many modeling approaches currently rely o...
Dissipation-Stabilized Quantum Revivals in a Non-Hermitian Lattice Gauge Theory
Yevgeny Bar Lev, Jad C. Halimeh, Achilleas Lazarides·Dec 30, 2025
With the advent of quantum simulation experiments of lattice gauge theories (LGTs), an open question is the effect of non-Hermiticity on their rich physics. The well-known PXP model, a U$(1)$ LGT with a two-level electric field in one spatial dimensi...
Assembling a Bose-Hubbard superfluid from tweezer-controlled single atoms
William J. Eckner, Theodor Lukin Yelin, Alec Cao +4 more·Dec 30, 2025
Quantum simulation relies on the preparation and control of low-entropy many-body systems to reveal the behavior of classically intractable models. The development of new approaches for realizing such systems therefore represents a frontier in quantu...
The Quantum State Continuity Problem and Temporal Enforcement Against Fork Attacks
Samet Ünsal·Dec 30, 2025
We introduce the Quantum State Continuity Problem (QSCP), a security objective orthogonal to identity authentication that captures whether a systems current execution is a legitimate continuation of a unique past execution. We show that classical and...
Sample Complexity for Embedded Multipartite Entanglement Witness via Pauli and Clifford Classical Shadows
Ziran Zhang·Dec 30, 2025
Detecting multipartite entanglement in many qubit systems is measurement-intensive, motivating protocols that estimate only selected observables with provable efficiency. In this work we use the classical shadow protocol to study the sample complexit...
Towards Quantum Machine Learning of Lattice Boltzmann Collision Operators for Fluid Dynamic Simulations
Wael Itani, Katepalli R. Sreenivasan·Dec 30, 2025
We attempt the use of a unitary operator to approximate the lattice Boltzmann collision operator. We use a modified amplitude encoding to bypass the renormalization that would have required classical processing at every step (thus eroding any quantum...
Investigation of the benefits and disadvantages of using double-pair anti-Helmholtz coils in BEC-producing MOT setups and optimizing their design
Şenol Tarhan, Gabriel Goetten de Lima·Dec 29, 2025
This work has investigated the Magneto-Optical Trap (MOT) system used to produce Bose-Einstein Condensate (BEC). A primary challenge addressed in this study concerns the geometric limitations of traditional single-pair anti-Helmholtz coil configurati...