Papers
Live trends in quantum computing research, updated daily from arXiv.
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The 2D free particle in the phase space quantum mechanics
Hubert Jóźwiak, Jaromir Tosiek·Apr 28, 2025
The Wigner eigenfunctions of a free quantum particle propagating on a plane are derived. Two possibilities are analysed. Firstly, the particle of given energy and angular momentum is discussed. In that case, a special choice of coordinates on the sym...
Emergence of Hermitian topology from non-Hermitian knots
Gaurav Hajong, Ranjan Modak, Bhabani Prasad Mandal·Apr 28, 2025
The non-Hermiticity of the system gives rise to a distinct knot topology in the complex eigenvalue spectrum, which has no counterpart in Hermitian systems. In contrast, the singular values of a non-Hermitian (NH) Hamiltonian are always real by defini...
Generalized pulse design in Floquet engineering: Application to interacting spin systems
Ryan Scott, Bryce Gadway, V. W. Scarola·Apr 28, 2025
Floquet engineering in quantum simulation employs externally applied high-frequency pulses to dynamically design steady-state effective Hamiltonians. Such protocols can be used to enlarge the space of Hamiltonians but approximations often limit pulse...
Roadmap on Quantum Thermodynamics
Steve Campbell, Irene D'Amico, Mario A. Ciampini +66 more·Apr 28, 2025
The last two decades has seen quantum thermodynamics become a well established field of research in its own right. In that time, it has demonstrated a remarkably broad applicability, ranging from providing foundational advances in the understanding o...
Towards Non-Abelian Quantum Signal Processing: Efficient Control of Hybrid Continuous- and Discrete-Variable Architectures
Shraddha Singh, Baptiste Royer, Steven M. Girvin·Apr 28, 2025
Robust quantum control is crucial for achieving operations below the quantum error correction threshold. Quantum Signal Processing (QSP) transforms a unitary parameterized by $θ$ into one governed by a polynomial function $f(θ)$, a feature that under...
Nonstabilizerness generation in a multiparticle quantum walk
Cătălin Paşcu Moca, Doru Sticlet, Balázs Dóra +3 more·Apr 28, 2025
We investigate the generation of non-stabilizerness, or magic, in a multi-particle quantum walk by analyzing the time evolution of the stabilizer Rényi entropy $M_2$. Our study considers both single- and two-particle quantum walks in the framework of...
Impossibility via W states and feasibility via W-like states for perfect quantum teleportation
Sora Kobayashi, Kei-Ichi Kondo·Apr 28, 2025
We examine the two-party perfect quantum teleportation of an unknown 1-qubit state in the case of sharing various 3-qubit entangled states between a sender and a receiver: GHZ state, W state and W-like state. We give an impossibility proof that the W...
Spin-Depairing-Induced Exceptional Fermionic Superfluidity
Soma Takemori, Kazuki Yamamoto, Akihisa Koga·Apr 28, 2025
We investigate the non-Hermitian (NH) attractive Hubbard model with spin depairing, which is a spin-resolved asymmetric hopping that nonreciprocally operates spins in the opposite direction. We find that spin depairing stabilizes a superfluid state u...
Gapped Boundaries of Kitaev's Quantum Double Models: A Lattice Realization of Anyon Condensation from Lagrangian Algebras
Mu Li, Xiao-Han Yang, Xiao-Yu Dong·Apr 28, 2025
The macroscopic theory of anyon condensation, rooted in the categorical structure of topological excitations, provides a complete classification of gapped boundaries in topologically ordered systems, where distinct boundaries correspond to the conden...
A Cautionary Note on Quantum Oracles
Avantika Agarwal, Srijita Kundu·Apr 28, 2025
In recent years, the quantum oracle model introduced by Aaronson and Kuperberg (2007) has found a lot of use in showing oracle separations between complexity classes and cryptographic primitives. It is generally assumed that proof techniques that do ...
Network-Aware Scheduling for Remote Gate Execution in Quantum Data Centers
Shahrooz Pouryousef, Reza Nejabati, Don Towsley +2 more·Apr 28, 2025
Modular quantum computing provides a scalable approach to overcome the limitations of monolithic quantum architectures by interconnecting multiple Quantum Processing Units (QPUs) through a quantum network. In this work, we explore and evaluate two en...
QFDNN: A Resource-Efficient Variational Quantum Feature Deep Neural Networks for Fraud Detection and Loan Prediction
Subham Das, Ashtakala Meghanath, B. Behera +3 more·Apr 28, 2025
Social financial technology focuses on trust, sustainability, and social responsibility, which require advanced technologies to address complex financial tasks in the digital era. With the rapid growth in online transactions, automating credit card f...
Precision polarization tuning for light shift mitigation in trapped-ion qubits
Hengchao Tu, Chunyang Luan, Menglin Zou +3 more·Apr 28, 2025
Trapped-ion qubits are among the most promising candidates for quantum computing, quantum information processing, and quantum simulation. In general, trapped ions are considered to have sufficiently long coherence times, which are mainly characterize...
Improved T counts and active volume estimates for high-level arithmetic subroutines
Sam Heavey·Apr 28, 2025
Surface code based quantum computers show great promise for fault-tolerant quantum computing, but most architectures needlessly increase the spacetime volume of a computation due to qubits sitting idly during a computation. Active volume architecture...
Estimating decoding graphs and hypergraphs of memory QEC experiments
E. Takou, Kenneth R. Brown·Apr 28, 2025
Characterizing the error sources of quantum devices is essential for building reliable large-scale quantum architectures and tailoring error correction codes to the noise profile of the devices. Tomography techniques can provide detailed information ...
Quantum Error Correction in Quaternionic Hilbert Spaces
Valentine Nyirahafashimana, Nurisya Mohd Shah, Umair Abdul Halim +2 more·Apr 28, 2025
We propose quaternion-based strategies for quantum error correction by extending quantum mechanics into quaternionic Hilbert spaces. Building on the properties of quaternionic quantum states, we define quaternionic analogues of Pauli operators and qu...
Rapid and efficient wavefront correction for spatially entangled photons using symmetrized optimization
Kiran Bajar, Ronen Shekel, Vikas S. Bhat +3 more·Apr 28, 2025
Spatial entanglement is a key resource in quantum technologies, enabling applications in quantum communication, imaging, and computation. However, propagation through complex media distorts spatial correlation, posing a challenge for practical implem...
Quantum-Inspired Cournot Model
Amarendra Sharma·Apr 28, 2025
This paper introduces economists to quantum-inspired approaches for modeling firm behavior in a Cournot Duopoly, designed for accessibility and pedagogical use. We present key quantum concepts -- superposition, entanglement, and quantum search algori...
Efficient quantum state preparation through seniority driven operator selection.
Dipa Halder, D. Mondal, Rahul Maitra·Apr 28, 2025
Quantum algorithms require accurate representations of electronic states on a quantum device, yet the approximation of electronic wavefunctions for strongly correlated systems remains a profound theoretical challenge, with existing methods struggling...
On-chip calibrated radio-frequency measurement at cryogenic temperatures for determination of SrTiO3-based capacitor properties
Akitomi Shirachi, M. Shinozaki, Yasuhide Tomioka +7 more·Apr 28, 2025
Quantum computing has emerged as a promising technology for next-generation information processing, utilizing semiconductor quantum dots as one of the candidates for quantum bits. Radio-frequency (rf) reflectometry plays an important role in the read...