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quant-ph2026

A Versatile Analytical Model for Fast and Accurate Determination of Feedline-Coupled Resonators for Superconducting Qubit Readout

Zhen Luo, Lea Richard, Ivan Tsitsilin +4

Superconducting quantum chips commonly utilize quarter-wavelength (λ/4) transmission line resonators as readout circuits. An analytical model for the accurate determination of reso…

quant-ph2026

Implementation of two-qubit Rydberg operations on neutral Rb-87 atoms in systems with different intermediate states

I. V. Iukhnovets, O. V. Bychkova, I. B. Bobrov +4

This work presents an experimental setup for implementing two-qubit operations on neutral atoms (Rb) with the possibility of using two different Rydberg excitation schemes.…

quant-ph2026★ 1 cited

Compile-Time Simplification of Classically Controlled Operations in Dynamic Circuits

Innocenzo Fulginiti, Yanbin Chen, Christian B. Mendl +1

Dynamic circuits use real-time outcomes of mid-circuit measurements, processed by a classical controller, to adapt subsequent operations during circuit execution. This additional f…

quant-ph2026

Addressable Rydberg excitation in arrays of single neutral atoms with a strongly focused flat-top beam

I. V. Iukhnovets, M. Y. Goloshchapov, A. P. Gordeev +4

We present a method for generating a laser beam with flat intensity and phase profiles in the focal region where the beam interacts with neutral Rb atoms in an array of opti…

quant-ph2026★ 1 cited

The MQT Compiler Collection: A Blueprint for a Future-Proof Quantum-Classical Compilation Framework

Lukas Burgholzer, Daniel Haag, Yannick Stade +3

As the capabilities of quantum computing hardware continue to rise, algorithms that exploit them are becoming increasingly complex. These developments increase the need for sophist…

quant-ph2026

Highly-Parallel Atom-Detection Accelerator for Tweezer-Based Neutral Atom Quantum Computers

Jonas Winklmann, Yian Yu, Xiaorang Guo +2

Neutral atom quantum computers (NAQCs) are among the most promising computational platforms for quantum computing. Controlling and measuring individual atoms and their states, whic…

quant-ph2026★ 2 cited

QuaNTUM: A Modular Quantum Communication Testbed for Scalable Fiber and Satellite Integration

Julien Chénedé, Tjorben Matthes, Josefine Krause +2

Secure communication is essential for modern society, from financial transactions to critical infrastructure. As classical encryption faces threats from advancing computational pow…

quant-ph2026

A Compact Broadband Purcell Filter for Superconducting Quantum Circuits in a 3D Flip-Chip Architecture

Zhen Luo, Lea Richard, Ivan Tsitsilin +4

Fast and high-fidelity qubit readout requires strong coupling between the readout resonator and the feedline. However, such coupling unavoidably enhances qubit decay through the Pu…

quant-ph2026

Optimizing CMOS-compatible, superconducting titanium nitride resonators: Deposition conditions and structuring processes

Simon J. K. Lang, Alexandra Schewski, Ignaz Eisele +10

We report on the fabrication and characterization of superconducting coplanar waveguide (CPW) resonators based on titanium nitride (TiN) thin films deposited on 200\,mm diameter hi…

quant-ph2026★ 3 cited

Spectral stability of cavity-enhanced single-photon emitters in silicon

Johannes Früh, Fabian Salamon, Andreas Gritsch +2

The unrivaled maturity of its nanofabrication makes silicon a promising hardware platform for quantum information processing. To this end, efficient single-photon sources and spin-…

quant-ph2026★ 3 cited

Integrating Quantum Software Tools with(in) MLIR

Patrick Hopf, Erick Ochoa Lopez, Yannick Stade +6

Compilers transform code into action. They convert high-level programs into executable hardware instructions - a crucial step in enabling reliable and scalable quantum computation.…

quant-ph2025

Evaluating Sample-Based Krylov Quantum Diagonalization for Heisenberg Models with Applications to Materials Science

Roman Firt, Neel Misciasci, Jonathan E. Mueller +4

We evaluate the Sample-based Krylov Quantum Diagonalization (SKQD) algorithm on one- and two-dimensional Heisenberg models, including strongly correlated regimes in which the groun…

quant-ph2025

Quantum circuit algorithm for topological invariants of second order topological many-body quantum magnets

Sebastián Domínguez-Calderón, Marcel Niedermeier, Jose L. Lado +1

Topological quantum matter represents a flexible playground to engineer unconventional excitations. While non-interacting topological single-particle systems have been studied in d…

quant-ph2025

Refrigeration of a 1D gas of microwave photons

Lukas Schamriß, Louis Garbe, Peter Rabl

We discuss a conceptually simple scheme for cooling a one dimensional gas of microwave photons in a superconducting transmission line. By shunting one end of the transmission line…

quant-ph2025

Bounded-Error Quantum Simulation via Hamiltonian and Lindbladian Learning

Tristan Kraft, Manoj K. Joshi, William Lam +11

Analog Quantum Simulators offer a route to exploring strongly correlated many-body dynamics beyond classical computation, but their predictive power remains limited by the absence…

quant-ph2025

Skeleton of isometric Tensor Network States for Abelian String-Net Models

Julian Boesl, Yu-Jie Liu, Frank Pollmann +1

We construct parametrized isometric tensor network states -- referred to as skeletons -- that allow us to explore phases of abelian topological order and can be efficiently impleme…

quant-ph2025★ 2 cited

Tackling the Challenges of Adding Pulse-level Support to a Heterogeneous HPCQC Software Stack: MQSS Pulse

Jorge Echavarria, Muhammad Nufail Farooqi, Amit Devra +22

We study the problem of adding native pulse-level control to heterogeneous High Performance Computing-Quantum Computing (HPCQC) software stacks, using the Munich Quantum Software S…

quant-ph2025

Modified logarithmic Sobolev inequalities for CSS codes

Sebastian Stengele, Ángela Capel, Li Gao +5

We consider the class of Davies quantum semigroups modelling thermalization for translation-invariant Calderbank-Shor-Steane (CSS) codes in D dimensions. We prove that conditions o…

quant-ph2025

Learning and certification of local time-dependent quantum dynamics and noise

Daniel Stilck França, Tim Möbus, Cambyse Rouzé +1

Hamiltonian learning protocols are becoming valuable tools for benchmarking and verifying quantum computers and simulators, yet few rigorous protocols address explicitly time-depen…

quant-ph2025

Robust Superradiance and Spontaneous Spin Ordering in Disordered Waveguide Quantum Electrodynamics

Xin H. H. Zhang, Daniel Malz, Peter Rabl

We study the collective emission of a disordered array of excited two-level atoms into a one-dimensional photonic waveguide. In the perfectly ordered case, where atoms are spac…

quant-ph2025★ 3 cited

Entangled Photon Pair Generator via Biexciton-Exciton Cascade in Semiconductor Quantum Dots and its Simulation

Simon Sekavčnik, Paul Kohl, Janis Nötzel

The generation of entangled photon pairs is highly useful for many types of quantum technologies. In this work an entangled photon pair generator that utilises the biexciton-excito…

quant-ph2025★ 1 cited

Layer codes as partially self-correcting quantum memories

Shouzhen Gu, Libor Caha, Shin Ho Choe +3

We investigate layer codes, a family of three-dimensional stabilizer codes that can achieve optimal scaling of code parameters and a polynomial energy barrier, as candidates for se…

quant-ph2025

Self-Sustained Oscillations of a Nonlinear Optomechanical System in the Low-Excitation Regime

Shivangi Dhiman, K. Rubenbauer, T. Luschmann +3

Manifesting across all time, mass and length scales, nonlinearities lie at the core of numerous physical phenomena. Next-generation quantum applications, such as quantum sensing, r…

quant-ph2025

Bridging Quantum Noise and Classical Electrodynamics with Stochastic Methods

Felix Hitzelhammer, Johannes Stowasser, Lukas Hanschke +7

The development of emerging technologies in quantum optics demands accurate models that faithfully capture genuine quantum effects. Mature semiclassical approaches reach their limi…