Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Multiparameter estimation for the superresolution of two incoherent sources
Antonin Grateau, Alexander Boeschoten, Tanguy Favin-Lévêque +2 more·Jan 21, 2026
We experimentally demonstrate the simultaneous estimation of the three parameters characterizing a pair of incoherent optical sources in the sub-Rayleigh regime, enabling super-resolved scene characterization. Using spatial-mode demultiplexing (SPADE...
Exotic collective behaviors of giant quantum emitters in two-dimensional baths
Qing-Yang Qiu, Wen Huang, Lei Du +1 more·Jan 21, 2026
Nonlocal light-matter interactions with giant atoms in high-dimensional environments are not only fundamentally intriguing for testing quantum electrodynamics beyond the dipole approximation but also crucial for building high-dimensional quantum netw...
Combatting noise in near-term quantum data centres
Kenny Campbell, Ahmed Lawey, Mohsen Razavi·Jan 21, 2026
We analyse the performance of different error handling methods in the quantum data centre paradigm of distributed quantum computing. We compare the impact of quantum error detection, using the three-qubit repetition code and the [[4, 1, 2]] Leung-Nie...
Routing Qubits on Noisy Networks
Claudia Benedetti, Giovanni Ragazzi, Simone Cavazzoni +2 more·Jan 21, 2026
Robust quantum routing is essential for scalable quantum technologies. This paper investigates the resilience of routing protocols in network architectures designed for perfect, high-fidelity transfer of both classical and quantum information under i...
Testing the equivalence to thermal states via extractable work under LOCC
Toshihiro Yada, Nobuyuki Yoshioka, Takahiro Sagawa·Jan 21, 2026
Understanding the thermal behavior of quantum many-body pure states is one of the most fundamental issues in quantum thermodynamics. It is widely known that typical pure states yield vanishing work, just as thermal states do, when one restricts to lo...
Blended Dynamics and Emergence in Open Quantum Networks
Qinghao Wen, Zihao Ren, Lei Wang +2 more·Jan 21, 2026
In this paper, we develop a blended dynamics framework for open quantum networks with diffusive couplings. The network consists of qubits interconnected through Hamiltonian couplings, environmental dissipation, and consensus-like diffusive interactio...
Anomalous Localization and Mobility Edges in Non-Hermitian Quasicrystals with Disordered Imaginary Gauge Fields
Guolin Nan, Zhijian Li, Feng Mei +1 more·Jan 21, 2026
Localization in non-Hermitian quasicrystals can differ fundamentally from its Hermitian counterpart when non-reciprocity is spatially disordered. Here we study a one-dimensional non-Hermitian Aubry-André-Harper chain with a Bernoulli imaginary gauge ...
On Distributed Quantum Computing with Distributed Fan-Out Operations
Seng W. Loke·Jan 21, 2026
We compare different circuits implementing distributed versions of quantum computations, using entangled pairs only, and using distributed fan-out operations (using GHZ states). We highlight the advantages of using distributed fan-out operations in t...
Kerr-enhanced amplification of three-wave mixing and emergent masing regimes
Ragheed Alhyder, Rishabh Sahu, Johannes M. Fink +2 more·Jan 21, 2026
Integrated optical microresonators exploiting either second-order ($χ^{(2)}$) or third-order ($χ^{(3)}$) nonlinearities have become key platforms for frequency conversion, low-noise microwave photonics, and quantum entanglement generation. Here, we p...
Adaptive Fidelity Estimation for Quantum Programs with Graph-Guided Noise Awareness
Tingting Li, Ziming Zhao, Jianwei Yin·Jan 21, 2026
Fidelity estimation is a critical yet resource-intensive step in testing quantum programs on noisy intermediate-scale quantum (NISQ) devices, where the required number of measurements is difficult to predefine due to hardware noise, device heterogene...
In-Substrate Imaging of Diamond hBN FET Current via Widefield Quantum Diamond Microscopy
Anuj Bathla, Subrat Kumar Pradhan, Ajit Kumar Dash +7 more·Jan 21, 2026
We demonstrate widefield magnetic imaging of current flow in hydrogen terminated diamond field effect transistors (FETs) through in-substrate nitrogen vacancy (NV) centers. Hydrogen termination of the diamond surface induces a two dimensional hole ga...
Scaling Enhancement in Distributed Quantum Sensing via Causal Order Switching
Binke Xia, Zhaotong Cui, Jingzheng Huang +2 more·Jan 21, 2026
Sensing networks underpin applications from fundamental physics to real-world engineering. Recently, distributed quantum sensing (DQS) has been investigated to boost the sensing performance, yet current schemes typically rely on entangled probes that...
Precision limit under weak-coupling with ancillary qubit
Peng Chen, Jun Jing·Jan 21, 2026
We propose a measurement-based quantum metrology protocol in a composite model, where the probe system (a spin ensemble) is coupled to an ancillary two-level system (qubit) with a general Heisenberg XXZ interaction. With an optimized and weak probe-a...
Quantum Interference Needs Convention: Overlap-Determinability and Unified No-Superposition Principle
Jeongho Bang, Kyoungho Cho, Ki Hyuk Yee·Jan 21, 2026
Quantum superposition is often phrased as the ability to add state vectors. In practice, however, the physical quantity is a ray (a rank-one projector), so each input specifies only a projector and leaves a gauge freedom in the phases of its vector r...
Programming Quantum Measurements of Time inside a Complex Medium
Dylan Danese, Vatshal Srivastav, Will McCutcheon +2 more·Jan 21, 2026
The temporal degree-of-freedom of light is incredibly powerful for modern quantum technologies, enabling large-scale quantum computing architectures and record key-rates in quantum key distribution. However, the generalized measurement of large and c...
Self-Aligned Heterogeneous Quantum Photonic Integration
Kinfung Ngan, Yeeun Choi, Chun-Chieh Chang +2 more·Jan 21, 2026
Integrated quantum photonics holds significant promise for scalable photonic quantum information processing, quantum repeaters, and quantum networks, but its development is hindered by the mismatch between materials hosting high-quality quantum emitt...
Active interference suppression in frequency-division-multiplexed quantum gates via off-resonant microwave tones
Haruki Mitarai, Yukihiro Tadokoro, Hiroya Tanaka·Jan 21, 2026
The increasing number of control lines connecting quantum processors to external electronics constitutes a major bottleneck in the realization of large-scale quantum computers. Frequency-division multiplexing is expected to enable control of multiple...
On the quantum separability of qubit registers
Szymon Lukaszyk·Jan 21, 2026
I show that the bipartite separability of a pure qubit state hinges critically on the combinatorial structure of its computational-basis support. Boolean cube geometry is used to introduce a taxonomy that distinguishes support-guaranteed separability...
Spin-$s$ $U(1)$-eigenstate preparation
Nabi Zare Harofteh, Rafael I. Nepomechie·Jan 20, 2026
We formulate a deterministic algorithm for preparing a general $U(1)$-eigenstate of a spin-$s$ chain of length $n$. These states consist of linear combinations of computational basis states $|\vec{m}\rangle$ of $n$ qudits, each with $(2s+1)$ levels a...
A Modulated Electron Lattice (MEL) Criterion for Metallic Superconductivity
Jaehwahn Kim, Davis A. Rens, Waqas Khalid +1 more·Jan 20, 2026
A central unresolved question in the theory of superconductivity is why only a small subset of metallic elements exhibit a superconducting state, whereas many others remain strictly normal. Neither the conventional Bardeen Cooper Schrieffer (BCS) fra...