Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Homological origin of transversal implementability of logical diagonal gates in quantum CSS codes
Junichi Haruna·Feb 16, 2026
Transversal Pauli Z rotations provide a natural route to fault-tolerant logical diagonal gates in quantum CSS codes, yet their capability is fundamentally constrained. In this work, we formulate the refinement problem of realizing a logical diagonal ...
A lesson from a small particle about quantum theory with strong implications for cosmology
Daniel Sudarsky, Octavio Guerrero·Feb 16, 2026
The establishment of extremely strong bounds on the magnitude of the electric dipole moment of the neutron, a quantity that is of great importance for determining the level of time reversal symmetry respected by the strong interactions, offers an imp...
A hardware-native time-frequency GKP logical qubit toward fault-tolerant photonic operation
Tai Hyun Yoon·Feb 16, 2026
We realize a hardware-native time--frequency Gottesman--Kitaev--Preskill (GKP) logical qubit encoded in the continuous phase space of single photons, establishing a propagating photonic implementation of bosonic grid encoding. Finite-energy grid stat...
A general theory of quantum measurements
Shizhong Mei·Feb 16, 2026
A universal energy eigenvalue equation is proposed in this paper. It is proven that the unique set of eigenfunctions or preferred basis exists for any non-isolated sub-system. Applying the new eigenvalue equation to the relative motion of a hydrogen ...
Fermionic Stoner-Dicke phase transition in Circuit Quantum Magnetostatics
Adel Ali, Alexey Belyanin·Feb 16, 2026
We present a minimal tunable many-body system of fermions coupled to quantum magnetic flux, which is analytically diagonalizable and exhibits a variety of many-body phenomena such as Stoner orbital instability and Dicke-like quantum phase transition....
Electron readout contrast enhancement in the parallel nuclear regime of an exchange-coupled donor spin qubit system
Holly G. Stemp, Mark R. van Blankenstein, Benjamin Wilhelm +10 more·Feb 16, 2026
Recent experiments on donor-based spin qubits in silicon have leveraged the exchange interaction between electrons bound to separate donor nuclei to perform two-qubit operations. A consistently observed yet unexplained phenomenon in such systems is t...
The Multiparameter Frontier: Metrological Hierarchy and Robustness in Dispersive Quantum Interferometry
Lucas Ferreira R. de Moura, Daniel Y. Akamatsu, G. D. de Moraes Neto +1 more·Feb 16, 2026
We present a dispersive quantum thermometry protocol for simultaneous estimation of inverse temperature $β$ and interaction strength $x$ using a nonlinear Mach-Zehnder interferometer coupled to a thermal ancilla. We derive closed-form expressions for...
Anonymous quantum sensing robust against state preparation errors
Hiroto Kasai, Seiichiro Tani, Yasuhiro Tokura +1 more·Feb 16, 2026
Networked quantum sensors have several applications such as the mapping of magnetic fields. When the magnetic fields are biomagnetic ones, i.e., they contain some private information, the information of from who non-zero magnetic fields occur has to ...
Fine-Grained Complexity for Quantum Problems from Size-Preserving Circuit-to-Hamiltonian Constructions
Nai-Hui Chia, Atsuya Hasegawa, François Le Gall +1 more·Feb 16, 2026
The local Hamiltonian (LH) problem is the canonical $\mathsf{QMA}$-complete problem introduced by Kitaev. In this paper, we show its hardness in a very strong sense: we show that the 3-local Hamiltonian problem on $n$ qubits cannot be solved classica...
Qute: Towards Quantum-Native Database
M. Chen, Xuanhe Zhou, Wei Zhou +7 more·Feb 16, 2026
This paper envisions a quantum database (Qute) that treats quantum computation as a first-class execution option. Unlike prior simulation-based methods that either run quantum algorithms on classical machines or adapt existing databases for quantum s...
Distributed Quantum Gaussian Processes for Multi-Agent Systems
Meet Gandhi, George P. Kontoudis·Feb 16, 2026
Gaussian Processes (GPs) are a powerful tool for probabilistic modeling, but their performance is often constrained in complex, largescale real-world domains due to the limited expressivity of classical kernels. Quantum computing offers the potential...
When Security Meets Usability: An Empirical Investigation of Post-Quantum Cryptography APIs
Marthin Toruan, R.D.N. Shakya, Samuel Tseitkin +2 more·Feb 16, 2026
Advances in quantum computing increasingly threaten the security and privacy of data protected by current cryptosystems, particularly those relying on public-key cryptography. In response, the international cybersecurity community has prioritized the...
Deciphering Majorana Zero Modes in Topological Superconductor FeTe0.55Se0.45 with Machine-Learning-Assisted Spectral Deconvolution
Jewook Park, Hoyeon Jeon, Dongwon Shin +4 more·Feb 16, 2026
Unambiguous identification of Majorana zero modes (MZMs) in topological superconductors (TSCs) remains a challenge due to complex in-gap states that can also produce zero-bias conductance peaks (ZBPs). Here we demonstrate a data-driven workflow that ...
Probing atom-surface interactions from tunneling-time measurements via rotation-transport on an atom chip
J-B. Gerent, R. Veyron, V. Mancois +3 more·Feb 15, 2026
We propose a novel method to measure the interaction between an ultracold gas of neutral atoms and a surface. This solution combines an optical dipole trap reflected by the surface, a magnetic trap formed by current carrying wires embedded below the ...
High-fidelity Quantum Readout Processing via an Embedded SNAIL Amplifier
Leon Bello, Boris Mesits, Michael Hatridge +1 more·Feb 15, 2026
Scalable, high-fidelity quantum-state readout remains a central challenge in the development of large-scale superconducting quantum processors. Conventional dispersive readout architectures depend on bulky isolators and external amplifiers, introduci...
Scalable Clifford-Based Classical Initialization for the Quantum Approximate Optimization Algorithm
Dhanvi Bharadwaj, Yuewen Hou, Guang-Yi Li +1 more·Feb 15, 2026
Variational Quantum Algorithms (VQAs), such as the Quantum Approximate Optimization Algorithm (QAOA), offer a promising route to tackling combinatorial optimization problems on near and intermediate-term quantum devices. However, their performance cr...
Dirac Spin Liquid Candidate in a Rydberg Quantum Simulator
Guillaume Bornet, Marcus Bintz, Cheng Chen +10 more·Feb 15, 2026
We experimentally investigate a frustrated spin-exchange antiferromagnet in a quantum simulator, composed of N = 114 dipolar Rydberg atoms arranged into a kagome array. Motivated by a recent theoretical proposal of a gapless U(1) Dirac spin liquid gr...
Quantum entanglement enhanced via dark mode control in molecular optomechanics
E. Kongkui Berinyuy, P. Djorwé, A. N. Al-Ahmadi +2 more·Feb 15, 2026
Quantum entanglement is an interesting resource for modern quantum technologies, where generating multiple quantum entanglement is highly required. However, entanglement engineering between multiple modes is strongly suppressed by dark mode effect. H...
Spacetime-Efficient and Hardware-Compatible Complex Quantum Logic Units in qLDPC Codes
Willers Yang, Jason Chadwick, Mariesa H. Teo +2 more·Feb 15, 2026
Quantum low-density parity-check (qLDPC) codes offer a promising route to scalable fault-tolerant quantum computing due to their substantially reduced footprint. However, these gains can be diluted at utility scale if we cannot also realize space-tim...
Topology optimization of type-II superconductors with superconductor-dielectric/vacuum interfaces based on Ginzburg-Landau theory under Weyl gauge
Yongbo Deng, Jan G. Korvink·Feb 15, 2026
Geometrical design is a crucial and challenging strategy for improving the performance of type-II superconductors, because the proper placement of intended defects in the current path contribute to flux pinning, a reduction in dissipation, and an inc...