Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Negative Hybridization: a Potential Cure for Braiding with Imperfect Majorana Modes
Cole Peeters, Themba Hodge, Stephan Rachel·Feb 9, 2026
Majorana zero modes, the elementary building blocks for the quantum bits of topological quantum computers, are known to suffer from hybridization as their wavefunctions begin to overlap. This breaks the ground state degeneracy, splitting their energy...
Constant-space-overhead fault-tolerant quantum input/output and communication
Paula Belzig, Hayata Yamasaki·Feb 9, 2026
Fault-tolerant capacities quantify the ability of a quantum channel to reliably transmit information when every component of the encoding and decoding procedure is noisy. Earlier work analyzed achievable communication rates under such noise using fau...
Volume-law protection of metrological advantage
Piotr Wysocki, Jan Chwedeńczuk, Marcin Płodzień·Feb 9, 2026
Although entanglement can boost metrological precision beyond the standard quantum limit, the advantage often disappears with particle loss. We demonstrate that scrambling safeguards precision by dispersing information about the encoded parameter int...
A building block of quantum repeaters for scalable quantum networks
Wen-Zhao Liu, Ya-Bin Zhou, Jiu-Peng Chen +26 more·Feb 9, 2026
Quantum networks, integrating quantum communication, quantum metrology, and distributed quantum computing, could provide secure and efficient information transfer, high-resolution sensing, and an exponential speed-up in information processing. Determ...
Classifying the simplest Bell inequalities beyond qubits and their applications towards self-testing
Palash Pandya, Shubhayan Sarkar, Remigiusz Augusiak·Feb 9, 2026
Bell inequalities reveal the fundamentally nonlocal character of quantum mechanics. In this regard, one of the interesting problems is to explore all possible Bell inequalities that demonstrate a gap between local and nonlocal quantum behaviour. This...
Non-Markovianity induced by Pauli-twirling
Joris Kattemölle, Balázs Gulácsi, Guido Burkard·Feb 9, 2026
Noise forms a central obstacle to effective quantum information processing. Recent experimental advances have enabled the tailoring of noise properties through Pauli twirling, transforming arbitrary noise channels into Pauli channels. This underpins ...
Plethysm is in #BQP
Matthias Christandl, Aram W. Harrow, Greta Panova +2 more·Feb 9, 2026
Some representation-theoretic multiplicities, such as the Kostka and the Littlewood-Richardson coefficients, admit a combinatorial interpretation that places their computation in the complexity class #P. Whether this holds more generally is considere...
Efficient circuit compression by multi-qudit entangling gates in linear optical quantum computation
Apurav, Jaskaran Singh·Feb 9, 2026
Linear optical quantum computation (LOQC) offers a promising platform for scalable quantum information processing, but its scalability is fundamentally constrained by the probabilistic nature of non-local entangling gates. Qudit circuit compression s...
Quantum-classical framework for many-fermion response and structure
Weijie Du, Yangguang Yang, Zixin Liu +2 more·Feb 9, 2026
Response functions are key observables for probing the structure and dynamics of many-body systems. We introduce and demonstrate a quantum-classical framework for computing response functions of general many-fermion systems that also provides the ful...
The simplified quantum circuits for implementing quantum teleportation
Wen-Xiu Zhang, Guo-Zhu Song, Hai-Rui Wei·Feb 9, 2026
It is crucial to design quantum circuits as small as possible and as shallow as possible for quantum information processing tasks. We design quantum circuits with simplified gate-count, cost, and depth for implementing quantum teleportation among var...
Preparing squeezed, cat and GKP states with parity measurements
Zhiyuan Lin, Sen Li, Jingyan Feng +3 more·Feb 9, 2026
Bosonic modes constitute a central resource in a wide range of quantum technologies, providing long-lived degrees of freedom for the storage, processing, and transduction of quantum information. Such modes naturally arise in platforms including circu...
Does fermionic entanglement always outperform bosonic entanglement in dilaton black hole?
Wen-Mei Li, Jianbo Lu, Shu-Min Wu·Feb 9, 2026
It has traditionally been believed that fermionic entanglement generally outperforms bosonic entanglement in relativistic frameworks, and that bosonic entanglement experiences sudden death in extreme gravitational environments. In this study, we anal...
An efficient method for spot-checking quantum properties with sequential trials
Yanbao Zhang, Akshay Seshadri, Emanuel Knill·Feb 8, 2026
In practical situations, the reliability of quantum resources can be compromised due to complex generation processes or adversarial manipulations during transmission. Consequently, the trials generated sequentially in an experiment may exhibit non-in...
Information-Theoretic Gaps in Solar and Reactor Neutrino Oscillation Measurements
Neetu Raj Singh Chundawat, Yu-Feng Li·Feb 8, 2026
Quantum estimation theory provides a fundamental framework for analyzing how precisely physical parameters can be estimated from measurements. Neutrino oscillations are characterized by a set of parameters inferred from experiments conducted in diffe...
Improved entanglement-based high-dimensional optical quantum computation with linear optics
Huan-Chao Gao, Guo-Zhu Song, Hai-Rui Wei·Feb 8, 2026
Quantum gates are the essential block for quantum computer. High-dimensional quantum gates exhibit remarkable advantages over their two-dimensional counterparts for some quantum information processing tasks. Here we present a family of entanglement-b...
Probing holographic conformal field theories
Ming Zhang, Jiayue Yang, Dyuman Bhattacharya +1 more·Feb 8, 2026
We introduce an operational, boundary-first framework that embeds relativistic quantum-information protocols into anti-de Sitter/Conformal Field Theory (AdS/CFT) by coupling an Unruh--DeWitt detector directly to a local scalar primary operator of a h...
Quantum Steering and Entanglement in a Tritter: Hierarchy under Loss
Jifeng Sun, Shumin Yang, Teng Zhao +2 more·Feb 8, 2026
Multipartite entangled states of continuous variables are fundamental resources for scalable quantum information processing. We study the correlation hierarchy in a tripartite state engineered by mixing a two-mode squeezed vacuum with a coherent stat...
Momentum-Driven Reversible Logic Accelerates Efficient Irreversible Universal Computation
Kuen Wai Tang, Kyle J. Ray, James P. Crutchfield·Feb 7, 2026
We present implementations of two physically-embedded computation-universal logical operations using a 2-bit logical unit composed of coupled quantum flux parametrons -- Josephson-junction superconducting circuits. To illustrate universality, we inve...
A Course on the Introduction to Quantum Software Engineering: Experience Report
Andriy Miranskyy·Feb 7, 2026
Quantum computing is increasingly practiced through programming, yet most educational offerings emphasize algorithmic or framework-level use rather than software engineering concerns such as testing, abstraction, tooling, and lifecycle management. Th...
Structural Theory of Information Backflow in Non-Markovian Relaxation: TC/TCL Formalism and Minimal Phase Diagrams
Koichi Nakagawa·Feb 7, 2026
We develop a structural theory of information backflow in minimal non-Markovian relaxation processes within the framework of nonequilibrium statistical mechanics. The approach is based on the time-convolution (TC) and time-convolutionless (TCL) proje...