Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Practical security of local local oscillator continuous-variable quantum key distribution systems with pulse width mismatch
Yi Zheng, Jiarui Wu, Chenlei Fang +3 more·Sep 30, 2025
In continuous-variable quantum key distribution (CVQKD) systems, using a local local oscillator (LLO) scheme removes the local oscillator side channel, enhances Bob's detection performance and reduces the excess noise caused by photon leakage, thereb...
MUSS-TI: Multi-level Shuttle Scheduling for Large-Scale Entanglement Module Linked Trapped-Ion
Xian Wu, Chenghong Zhu, Jingbo Wang +1 more·Sep 30, 2025
Trapped-ion computing is a leading architecture in the pursuit of scalable and high fidelity quantum systems. Modular quantum architectures based on photonic interconnects offer a promising path for scaling trapped ion devices. In this design, multip...
Nonreciprocal superradiant quantum phase transition induced by the magnon Kerr effect
Guo-Qiang Zhang, Si-Yan Lin, Wei Feng +3 more·Sep 30, 2025
Recently, proposals for realizing a nonreciprocal superradiant quantum phase transition (SQPT) have been put forward, based on either nonreciprocal interactions between two spin ensembles or the Sagnac-Fizeau shift in a spinning cavity. However, expe...
Exact Solutions to the Quantum Schrödinger Bridge Problem
Mykola Bordyuh, Djork-Arné Clevert, Marco Bertolini·Sep 30, 2025
The Quantum Schrödinger Bridge Problem (QSBP) describes the evolution of a stochastic process between two arbitrary probability distributions, where the dynamics are governed by the Schrödinger equation rather than by the traditional real-valued wave...
Computable measures of non-Markovianity for Gaussian free fermion systems
Giuliano Chiriacò·Sep 30, 2025
We investigate measures of non-Markovianity in open quantum systems governed by Gaussian free fermionic dynamics. Standard indicators of non-Markovian behavior, such as the BLP and LFS measures, are revisited in this context. We show that for Gaussia...
Classical feature map surrogates and metrics for quantum control landscapes
Martino Calzavara, Tommaso Calarco, Felix Motzoi·Sep 30, 2025
We derive and analyze three feature map representations of parametrized quantum dynamics, which generalize variational quantum circuits. These are (i) a Lie-Fourier partial sum, (ii) a Taylor expansion, and (iii) a finite-dimensional sinc kernel regr...
Toward Quantum-Enabled Biomarker Discovery: An Outlook from Q4Bio
Dhirpal Shah, Mariesa Teo, Ryan A. Robinett +12 more·Sep 30, 2025
We present a case study and forward-looking perspective on co-design for hybrid quantum-classical algorithms, centered on the goal of empirical quantum advantage (EQA), which we define as a measurable performance gain using quantum hardware over stat...
Probeless vs Probe-Based Variable-Strength Eavesdropping in Quantum Key Distribution
Yuval Idan, Tal Gofman, Ziv Abelson +3 more·Sep 30, 2025
Quantum key distribution (QKD) is a provably secure way of generating a secret key, which can later be used for encoding and decoding information. In this paper we analyze the effects of an eavesdropper's variable-strength measurements on QKD. Two ty...
Perturbation theory, irrep truncations, and state preparation methods for quantum simulations of SU(3) lattice gauge theory
Praveen Balaji, Cianan Conefrey-Shinozaki, Patrick Draper +4 more·Sep 30, 2025
We study methods for efficient preparation of approximate ground states of $SU(3)$ lattice gauge theory on quantum hardware. Working in a variant of the electric basis, we introduce a refinement of the irrep truncation based on the energy density of ...
Coherence restoring in communication line via controlled interaction with environment
E. B. Fel'dman, I. D. Lazarev, A. N. Pechen +1 more·Sep 30, 2025
We consider the state-restoring protocol based on the controlled interaction of a linear chain with environment through { incoherent control by} the specially adjusted step-wise time dependent Lindblad operators. We show that the best restoring resul...
Dynamical Acoustic Control of Resonance Fluorescence from a Strongly Driven Two-Level System
Yuan Zhan, Zixuan Wang, Richard P. Mirin +2 more·Sep 30, 2025
Resonance fluorescence from a single two-level system is a cornerstone of quantum optics. In the strong driving regime, its emission spectrum exhibits the iconic Mollow triplet, with each spectral component corresponding to a transition between disti...
The Guided Local Hamiltonian Problem for Stoquastic Hamiltonians
Gabriel Waite·Sep 30, 2025
We show that the Guided Local Hamiltonian problem for stoquastic Hamiltonians is (promise) BPP-hard. The Guided Local Hamiltonian problem is a variant of the Local Hamiltonian problem that incorporates an additional input known as a guiding state, wh...
Unsupervised Detection of Topological Phase Transitions with a Quantum Reservoir
Li Xin, Da Zhang, Zhang-Qi Yin·Sep 30, 2025
In quantum many-body systems, characterizing topological phase transitions typically requires complex many-body topological invariants, which are costly to compute and measure. Inspired by quantum reservoir computing, we propose an unsupervised quant...
On the Complexity of the Succinct State Local Hamiltonian Problem
Gabriel Waite, Karl Lin·Sep 30, 2025
We study the computational complexity of the Local Hamiltonian problem under the promise that its ground state is succinctly represented. We show that the Succinct State 2-Local Hamiltonian problem, for qubit Hamiltonians, is (promise) MA-complete. T...
Physically-Motivated Guiding States for Local Hamiltonians
Gabriel Waite, Karl Lin, Samuel J Elman +1 more·Sep 30, 2025
We study the computational complexity of the Guided Local Hamiltonian problem: given a local Hamiltonian $H$ together with a classical description of a guiding state that has non-negligible overlap with the ground state of $H$, estimate the ground-st...
Hybrid Schemes of NIST Post-Quantum Cryptography Standard Algorithms and Quantum Key Distribution for Key Exchange and Digital Signature
Abel C. H. Chen·Sep 30, 2025
Since the security of post-quantum cryptography (PQC) algorithms is based on the hardness of mathematical problems, while the security of quantum key distribution (QKD) relies on the fundamental principles of quantum physics, each approach possesses ...
Nonstabilizerness without Magic: Classically Simulatable Quantum States That Are Indistinguishable by Classically Simulatable Quantum Circuits
Hyukjoon Kwon·Sep 30, 2025
Quantum state discrimination plays a central role in defining the possible and impossible operations through a restricted class of quantum operations. A seminal result by Bennett et al. [Phys. Rev. A 59, 1070 (1999)] demonstrates the existence of a s...
Ingress Cryogenic Receivers Toward Scalable Quantum Information Processing: Theory and System Analysis
Malek Succar, Mohamed I. Ibrahim·Sep 30, 2025
Current control techniques for cryogenically cooled qubits are realized with coaxial cables, posing multiple challenges in terms of cost, thermal load, size, and long-term scalability. Emerging approaches to tackle this issue include cryogenic CMOS e...
Transformer-Based Neural Networks Backflow for Strongly Correlated Electronic Structure
Huan Ma, Bowen Kan, Honghui Shang +1 more·Sep 30, 2025
Solving the electronic Schrödinger equation for strongly correlated systems remains one of the grand challenges in quantum chemistry. Here we demonstrate that Transformer architectures can be adapted to capture the complex grammar of electronic corre...
Dual effects of Lamb Shift in Quantum Thermodynamical Systems
Zi-chen Zhang, Chang-shui Yu·Sep 30, 2025
The Lamb shift as an additional energy correction induced by environments usually has a marginal contribution and hence is neglected. We demonstrate that the Lamb shift, which modifies the energy levels, can influence the heat current to varying exte...