Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Bath-free squeezed phonon lasing via intrinsic ion-phonon coupling
Chen-Yu Lee, Guin-Dar Lin·Jan 9, 2026
We present a theoretical model for realizing squeezed lasing in a trapped-ion system without relying on engineered baths or tailored dissipative reservoirs. Our approach leverages the intrinsic ion-phonon interactions, where two trapped ions, each in...
Narrowband four-photon states from spontaneous four-wave mixing
Yifan Li, Justin Yu Xiang Peh, Chang Hoong Chow +3 more·Jan 9, 2026
We observe time-correlated four photons within a correlation window of 20ns from spontaneous four-wave mixing via a double-Lambda scheme in a cold cloud of Rb-87 atoms. In contrast to high-power pulsed pumping of chi^(2) nonlinear processes in crysta...
Emergence of the 2nd Law in an Exactly Solvable Model of a Quantum Wire
Marco A. Jimenez-Valencia, Charles A. Stafford·Jan 9, 2026
As remarked by Boltzmann, the Second Law of Thermodynamics is notable for the fact that it is readily proved using elementary statistical arguments, but becomes harder and harder to verify the more precise the microscopic description of a system. In ...
Multi-Image Super Resolution Framework for Detection and Analysis of Plant Roots
Shubham Agarwal, Ofek Nourian, Michael Sidorov +4 more·Jan 9, 2026
Understanding plant root systems is critical for advancing research in soil-plant interactions, nutrient uptake, and overall plant health. However, accurate imaging of roots in subterranean environments remains a persistent challenge due to adverse c...
A three-dimensional multimode lumped-element resonator for collective spin manipulation and dispersive readout
Zhuo Chen, Wenhua Qin, Hanyu Ren +5 more·Jan 9, 2026
We report a three-dimensional lumped-element multimode microwave resonator that enables homogeneous collective manipulation and dispersive readout of a macroscopic spin ensemble. By exploiting geometric symmetry, two antisymmetric modes with strongly...
Achieving the Heisenberg limit using fault-tolerant quantum error correction
Himanshu Sahu, Qian Xu, Sisi Zhou·Jan 9, 2026
Quantum effect enables enhanced estimation precision in metrology, with the Heisenberg limit (HL) representing the ultimate limit allowed by quantum mechanics. Although the HL is generally unattainable in the presence of noise, quantum error correcti...
LOTUS: Layer-ordered Temporally Unified Schedules For Quantum Approximate Optimization Algorithms
Phuong-Nam Nguyen·Jan 9, 2026
In this paper, we introduce LOTUS (Layer-Ordered Temporally-Unified Schedules), which is a framework that restructures QAOA from a high-dimensional, chaotic search into a low-dimensional dynamical system. By replacing independent layer-wise angles wi...
Causality Criteria for Island Models
Feiyu Deng·Jan 9, 2026
Island models offer a compelling resolution of the black hole information paradox, but they also raise persistent questions about causal consistency in effective descriptions. In particular, effective theories arising in double holography can exhibit...
Analytical Solutions to Asymmetric Two-Photon Rabi Model
M. Baradaran, L. M. Nieto, S. Zarrinkamar·Jan 8, 2026
Within the Segal-Bargmann representation, a generalized Rabi model is considered that includes both two-photon and asymmetric terms. It is shown that, through a suitable transformation, nearly exact solutions can be obtained using the Bethe ansatz ap...
Emission Dynamics of Rydberg Excitons in $\mathbf{\mathrm{Cu_2O}}$: Distinguishing Second Harmonic Generation from Secondary Emission
Kerwan Morin, Poulab Chakrabarti, Delphine Lagarde +5 more·Jan 8, 2026
Rydberg excitons in $\mathrm{Cu_2O}$ simultaneously give rise to two very different optical responses under resonant two-photon excitation: a coherent second-harmonic signal mediated by the excitonic second order susceptibility tensor $χ^{(2)}$, and ...
From compatibility of measurements to exploring Quantum Darwinism on NISQ
Emery Doucet, Sebastian Deffner·Jan 8, 2026
Quantum Darwinism explains how tenets of classical reality, such as objectivity and repeatability, emerge within a quantum universe. As a mathematical framework, Quantum Darwinism also provides guiding principles that determine what physical models s...
Remarkable Dates and Place: One Hundred Years Ago
Sergei K. Suslov·Jan 8, 2026
Exactly a century ago, wave quantum mechanics was born in Arosa, Switzerland. Erwin Schrödinger was vacationing in this classic Swiss Alps town at Christmas 1925 when he made his breakthrough discovery of the wave equation \cite{SchrQMI}.
Fundamental Limitations on the Reliabilities of Power and Work in Quantum Batteries
Brij Mohan, Tanmoy Pandit, Maciej Lewenstein +1 more·Jan 8, 2026
Quantum batteries, microscopic devices designed to address energy demands in quantum technologies, promise high power during charging and discharging processes. Yet their practical usefulness and performance depend critically on reliability, quantifi...
When and why non-Hermitian eigenvalues miss eigenstates in topological physics
Lucien Jezequel, Loïc Herviou, Jens Bardarson·Jan 8, 2026
Non-Hermitian systems exhibit a fundamental spectral dichotomy absent in Hermitian physics: the eigenvalue spectrum and the eigenstate spectrum can deviate significantly in the thermodynamic limit. We explain how non-Hermitian Hamiltonians can suppor...
Scalable Suppression of XY Crosstalk by Pulse-Level Control in Superconducting Quantum Processors
Hui-Hang Chen, Chiao-Hsuan Wang·Jan 8, 2026
As superconducting quantum processors continue to scale, high-performance quantum control becomes increasingly critical. In densely integrated architectures, unwanted interactions between nearby qubits give rise to crosstalk errors that limit operati...
Fast convergence of Majorana Propagation for weakly interacting fermions
Giorgio Facelli, Hamza Fawzi, Omar Fawzi·Jan 8, 2026
Simulating the time dynamics of an observable under Hamiltonian evolution is one of the most promising candidates for quantum advantage as we do not expect efficient classical algorithms for this problem except in restricted settings. Here, we introd...
Interacting electrons in silicon quantum interconnects
Anantha S. Rao, Christopher David White, Sean R. Muleady +2 more·Jan 8, 2026
Coherent interconnects between gate-defined silicon quantum processing units are essential for scalable quantum computation and long-range entanglement. We argue that one-dimensional electron channels formed in the silicon quantum well of a Si/SiGe h...
Cat states and violation of the Bell-CHSH inequality in relativistic Quantum Field Theory
M. S. Guimaraes, I. Roditi, S. P. Sorella·Jan 8, 2026
A cat state localized in the right Rindler wedge is employed to study the violation of the Bell-CHSH inequality in a relativistic scalar free Quantum Field Theory. By means of the bounded Hermitian operator $sign(\varphi(f))$, where $\varphi(f)$ stan...
Chiral Graviton Modes in Fermionic Fractional Chern Insulators
Min Long, Zeno Bacciconi, Hongyu Lu +3 more·Jan 8, 2026
Chiral graviton modes are hallmark collective excitations of Fractional Quantum Hall (FQH) liquids. However, their existence on the lattice, where continuum symmetries that protect them from decay are lost, is still an open and urgent question, espec...
Beyond the imbalance: site-resolved dynamics probing resonances in many-body localization
Asmi Haldar, Thibault Scoquart, Fabien Alet +1 more·Jan 8, 2026
We explore the limitations of using imbalance dynamics as a diagnostic tool for many-body localization (MBL) and show that spatial averaging can mask important microscopic features. Focusing on the strongly disordered regime of the random-field XXZ c...