Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Imaging Walk-Off Driven Distortions in EPR Photon Pair Correlations
Christian Howard, Roohollah Ghobadi, Nazanin Dehghan +2 more·Dec 13, 2025
Spontaneous parametric down-conversion is the primary source of position-correlated and momentum-anticorrelated photon pairs that form the canonical Einstein-Podolsky-Rosen (EPR) state. Their transverse spatial correlations are usually analyzed withi...
Quantum Coherence Dispersion
Fernando Parisio·Dec 13, 2025
We investigate how quantum coherence can be distributed among the several off-diagonal elements of an arbitrary density matrix. An easily computable quantity that captures this variability notion is proposed and it is argued that it presents marked f...
Coulomb crystallization of xenon highly charged ions in a laser-cooled Ca+ matrix
Leonid Prokhorov, Aaron A. Smith, Mingyao Xu +17 more·Dec 13, 2025
We report on the sympathetic cooling and Coulomb crystallization of xenon highly charged ions (HCIs) with laser-cooled Ca$^+$ ions. The HCIs are produced in a compact electron beam ion trap, then charge selected, decelerated, and finally injected int...
Cavity Mediated Two-Qubit Gate: Tuning to Optimal Performance with NISQ Era Quantum Simulations
Shreekanth S. Yuvarajan, Vincent Iglesias-Cardinale, David Hucul +1 more·Dec 12, 2025
A variety of photon-mediated operations are critical to the realization of scalable quantum information processing platforms and their accurate characterization is essential for the identification of optimal regimes and their experimental realization...
A Room-Temperature Extreme High Vacuum System for Trapped-Ion Quantum Information Processing
Lewis Hahn, Nikhil Kotibhaskar, Fabien Lefebvre +4 more·Dec 12, 2025
We present a room-temperature Extreme High Vacuum (XHV) system engineered to support the long-duration operation of a trapped-ion quantum processor. Background-gas collisions impose limitations on trapped-ion performance and scalability by interrupti...
CNOT gates in inductively coupled multi-fluxonium systems
Valeria Díaz Moreno, Nikola D. Dimitrov, Vladimir E. Manucharyan +1 more·Dec 12, 2025
High-fidelity two-qubit gates have been demonstrated in systems of two fluxonium qubits; however, the realization of scalable quantum processors requires maintaining low error rates in substantially larger architectures. In this work, we analyze a sy...
Tailored Error Mitigation for Single-Qubit Magnetometry
Miriam Resch, Dennis Herb, Mirko Rossini +2 more·Dec 12, 2025
Quantum sensing is an emerging field with the potential to outperform classical methods in both precision and spatial resolution. However, the sensitivity of the underlying quantum platform also makes the sensors highly susceptible to their environme...
Nuclear magnetic resonance on a single atom with a local probe
Hester G. Vennema, Cristina Mier, Evert W. Stolte +3 more·Dec 12, 2025
The nuclear spin is a prime candidate for quantum information applications due to its weak coupling to the environment and inherently long coherence times. However, this weak coupling also challenges the addressability of the nuclear spin. Here we de...
Boltzmann to Lindblad: Classical and Quantum Approaches to Out-of-Equilibrium Statistical Mechanics
Stefano Giordano, Giuseppe Florio, Giuseppe Puglisi +2 more·Dec 12, 2025
Open quantum systems play a central role in contemporary nanoscale technologies, including molecular electronics, quantum heat engines, quantum computation and information processing. A major theoretical challenge is to construct dynamical models tha...
QGEC : Quantum Golay Code Error Correction
Hideo Mukai, Hoshitaro Ohnishi·Dec 12, 2025
Quantum computers have the possibility of a much reduced calculation load compared with classical computers in specific problems. Quantum error correction (QEC) is vital for handling qubits, which are vulnerable to external noise. In QEC, actual erro...
Distributed Quantum Magnetic Sensing for Infrastructure-free Geo-localization
Thinh Le, Shiqian Guo, Jianqing Liu·Dec 12, 2025
Modern navigation systems rely heavily on Global Navigation Satellite Systems (GNSS), whose weak spaceborne signals are vulnerable to jamming, spoofing, and line-of-sight blockage. As an alternative, the Earth's magnetic field entails location inform...
Entanglement Evolution of Noisy Quantum Systems: Master Equation-TFD Solutions
Urjjarani Patel, KVS Shiv Chaitanya·Dec 12, 2025
In this paper, Thermofield Dynamics (TFD) is applied to map a quantum optics nonlinear master equation into a Schrodinger-like equation for any arbitrary initial condition. This formalism provides a more efficient way for solving open quantum system ...
A Survey of OAM-Encoded High-Dimensional Quantum Key Distribution: Foundations, Experiments, and Recent Trends
Huan Zhang, Zhenyu Cao, Yu Sun +1 more·Dec 12, 2025
High-dimensional quantum key distribution (HD-QKD) enhances information efficiency and noise tolerance by encoding data in large Hilbert spaces. The orbital angular momentum (OAM) of light provides a scalable basis for such encoding and supports high...
On Shor's conjecture on the accessible information of quantum dichotomies
Khac Duc An Thai, Michele Dall'Arno·Dec 12, 2025
Around the turn of the century, Shor formulated his well-known and still-open conjecture stating that the accessible information of any quantum dichotomy, that is the maximum amount of classical information that can be decoded from a binary quantum e...
Deterministic Equations for Feedback Control of Open Quantum Systems III: Full counting statistics for jump-based feedback
Alberto J. B. Rosal, Guilherme Fiusa, Patrick P. Potts +1 more·Dec 11, 2025
In this work, we consider a general feedback protocol based on quantum-jump detections, where the last detected jump channel is stored in a memory and subsequently used to implement a feedback action, such as modifying the system Hamiltonian conditio...
Information-Theoretic and Operational Measures of Quantum Contextuality
Ali Can Günhan, Zafer Gedik·Dec 11, 2025
We propose an information -- theoretic framework for quantifying Kochen-Specker contextuality. Two complementary measures are introduced: the mutual information energy, a state-independent quantity inspired by Onicescu's information energy that captu...
Choi echo: dynamical irreversibility and local decoherence in quantum many-body chaos
Jose Alfredo de Leon, Miguel Gonzalez, Carlos Diaz-Mejia·Dec 11, 2025
Quantifying intrinsic irreversibility in open quantum dynamics is central to understanding decoherence and information loss in many-body systems. In this work, we introduce the Choi echo, which provides an operational interpretation of the purity of ...
Qubit decoherence in dissipative two-photon resonator: real-time instantons and Wigner function
V. Yu. Mylnikov, S. O. Potashin, Alex Kamenev·Dec 11, 2025
We study the quantum dynamics of a single bosonic cavity subject to two-photon driving and two-photon dissipation in the presence of finite detuning. Exploiting a hidden time-reversal symmetry, the Wigner representation and the WKB method, we introdu...
Quantifying classical and quantum bounds for resolving closely spaced, non-interacting, simultaneously emitting dipole sources in optical microscopy
Armine I. Dingilian, Aarnah Kurella, Cheyenne S. Mitchell +3 more·Dec 11, 2025
Recent theoretical and experimental work has shown that the quantum Fisher information associated with estimating the separation between two optical point sources remains finite at small separations, effectively opening new routes to super-resolution...
Metrics on completely positive maps via noncommutative geometry
Are Austad, Erik Bédos, Jonas Eidesen +2 more·Dec 11, 2025
We study methods of inducing metrics on unital completely positive maps by employing seminorms arising in noncommutative geometry. Our main approach relies on the development of an infinite-dimensional $C^*$-algebraic analogue of the Choi-Jamiołkowsk...