Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Highly robust logical qubit encoding in an ensemble of V-symmetrical qutrits
Luis Octavio Castaños-Cervantes, Manuel Calixto, Julio Guerrero·Dec 5, 2025
We propose using even and odd Schödinger cat states formed from coherent states of U(3) of an ensemble of qutrits with a symmetrical V-configuration (a qubit-disguised qutrit) to encode a logical qubit. These carefully engineered logical qubit states...
Deterministic and Universal Frequency-Bin Gate for High-Dimensional Quantum Technologies
Xin Chen·Dec 5, 2025
High-dimensional photonic systems access large Hilbert spaces for quantum information processing. They offer proven advantages in quantum computation, communication, and sensing. However, implementing scalable, low-loss unitary gates across many mode...
Heisenberg-Weyl bosonic phase spaces: emergence, constraints and quantum informational resources
Eloi Descamps, Astghik Saharyan, Arne Keller +1 more·Dec 5, 2025
Phase space quasi-probability functions provide powerful representations of quantum states and operators, as well as criteria for assessing quantum computational resources. In discrete, odd-dimensional systems (qudits), protocols involving only non-n...
A Hierarchy of Entanglement Cones via Rank-Constrained $C^*$-Convex Hulls
Mohsen Kian·Dec 5, 2025
This paper systematically investigates the geometry of fundamental quantum cones, the separable cone ($\mathscr{P}_+$) and the Positive Partial Transpose (PPT) cone ($\mathcal{P}_{\mathrm{PPT}}$), under generalized non-commutative convexity. We demon...
Highly resilient, error-protected quantum gates in a solid-state quantum network node
E. Poem, M. I. Cohen, S. Blum +8 more·Dec 4, 2025
High-fidelity quantum gates are a cornerstone of any quantum computing and communications architecture. Realizing such control in the presence of realistic errors at the level required for beyond-threshold quantum error correction is a long-standing ...
Analog quantum simulation of the Lipkin-Meshkov-Glick model in a transmon qudit
Elizabeth Champion, Annie Schwartz, Muhammad A. Ijaz +4 more·Dec 4, 2025
The simulation of large-scale quantum systems is one of the most sought-after applications of quantum computers. Of particular interest for near-term demonstrations of quantum computational advantage are analog quantum simulations, which employ analo...
Expanding the Neutral Atom Gate Set: Native iSWAP and Exchange Gates from Dipolar Rydberg Interactions
Pedro Ildefonso, Andrew Byun, Aleksei Konovalov +3 more·Dec 4, 2025
We present a native realization of iSWAP and parameterized exchange gates for neutral atom quantum processing units. Our approach leverages strong dipole-dipole interactions between two dipole-coupled Rydberg states, and employs optimal control techn...
Bayesian stepwise estimation of qubit rotations
Mylenne Manrique, Marco Barbieri, Assunta Di Vizio +4 more·Dec 4, 2025
This work investigates Bayesian stepwise estimation (Se) for measuring the two parameters of a unitary qubit rotation. While asymptotic analysis predicts a precision advantage for SE over joint estimation (JE) in regimes where the quantum Fisher info...
Supramolecular approach-based intermolecular interaction energy calculations using quantum phase estimation algorithm
Yuhei Tachi, Akihiko Arakawa, Taisei Osawa +2 more·Dec 4, 2025
Accurate computation of non-covalent, intermolecular interaction energies is important to understand various chemical phenomena, and quantum computers are anticipated to accelerate it. Although the state-of-the-art quantum computers are still noisy a...
Rotation angles of a rotating disc as the holonomy of the Hopf fibration
Takuya Matsumoto·Dec 4, 2025
This article investigates a simple kinematical model of a disc (Disc B) rolling on the edge of a fixed disc (Disc A) to study the geometric nature of rotation. The total rotation angle $Δ$ of Disc B after one cycle is decomposed into a dynamical phas...
A Quantum Gate Architecture via Teleportation and Entanglement
Samuel J. Sheldon, Pieter Kok, Callum W. Duncan·Dec 3, 2025
We present a universal quantum computing architecture which combines the measurement-driven aspect of MBQC with the circuit model's algorithm dependent generation of qubit entanglement. Our architecture, which we call QGATE, is tailored for discrete-...
Minimizing the Number of Code Switching Operations in Fault-Tolerant Quantum Circuits
Erik Weilandt, Tom Peham, Robert Wille·Dec 3, 2025
Fault-tolerant quantum computers rely on Quantum Error-Correcting Codes (QECCs) to protect information from noise. However, no single error-correcting code supports a fully transversal and therefore fault-tolerant implementation of all gates required...
Polylogarithmic-Depth Quantum Algorithm for Simulating the Extended Hubbard Model on a Two-Dimensional Lattice Using the Fast Multipole Method
Yu Wang, Martina Nibbi, Maxine Luo +4 more·Dec 3, 2025
The extended Hubbard model on a two-dimensional lattice captures key physical phenomena, but is challenging to simulate due to the presence of long-range interactions. In this work, we present an efficient quantum algorithm for simulating the time ev...
Distributed Quantum Computing with Fan-Out Operations and Qudits: the Case of Distributed Global Gates
Seng W. Loke·Dec 3, 2025
Much recent work on distributed quantum computing have focused on the use of entangled pairs and distributed two qubit gates. But there has also been work on efficient schemes for achieving multipartite entanglement between nodes in a single shot, re...
Optimizing two-qubit gates for ultracold fermions in optical lattices
Jan A. P. Reuter, Juhi Singh, Tommaso Calarco +2 more·Dec 3, 2025
Ultracold neutral atoms in optical lattices are a promising platform for simulating the behavior of complex materials and implementing quantum gates. We optimize collision gates for fermionic Lithium atoms confined in a double-well potential, control...
Energy-Scaled Zero-Noise Extrapolation for Gottesman-Kitaev-Preskill Code
Gui-Zhong Luo, Matthew Otten·Dec 3, 2025
The performance of Gottesman-Kitaev-Preskill (GKP) codes, an approach to hardware-efficient quantum error correction, is limited by the finite squeezing capabilities of current experimental platforms. To circumvent this hardware demand, we introduce ...
Information dynamics and symmetry breaking in generic monitored $\mathbb{Z}_2$-symmetric open quantum systems
Jacob Hauser, Ali Lavasani, Sagar Vijay +1 more·Dec 2, 2025
We investigate the steady-state phases of generic $\mathbb{Z}_2$-symmetric monitored, open quantum dynamics. We describe the phases systematically in terms of both information-theoretic diagnostics and spontaneous breaking of strong and weak symmetri...
Fault-tolerant quantum computation with constant overhead for general noise
Matthias Christandl, Omar Fawzi, Ashutosh Goswami·Dec 2, 2025
Fault-tolerant quantum computation traditionally incurs substantial resource overhead, with both qubit and time overheads scaling polylogarithmically with the size of the computation. While prior work by Gottesman showed that constant qubit overhead ...
Improved Ising Meson Spectroscopy Simulation on a Noisy Digital Quantum Device
Hao-Ti Hung, Isabel Nha Minh Le, Johannes Knolle +1 more·Dec 2, 2025
The transverse-field Ising model serves as a paradigm for studying confinement and excitation spectra, particularly the emergence of $E_8$ symmetry near criticality. However, experimentally resolving the Ising meson spectroscopy required to verify th...
Scalable Quantum Reversible BCD Adder Architectures with Enhanced Speed and Reduced Quantum Cost for Next-Generation Computing
Negin Mashayekhi, Mohammad Reza Reshadinezhad, Antonio Rubio +1 more·Dec 1, 2025
The quantum and reversible paradigm merges the principles of quantum mechanics and reversible computation to enable information-preserving processing. It supports next-generation computing architectures that provide improved scalability and enhanced ...