Merged amplitude encoding for Chebyshev quantum Kolmogorov--Arnold networks: trading qubits for circuit executions

This paper introduces merged amplitude encoding for Chebyshev quantum Kolmogorov–Arnold networks, a technique that reduces circuit executions by a factor of nn at the cost of only 1–2 additional qubits, and provides empirical evidence that this resource-efficient encoding preserves trainability comparable to the original sequential baseline under various simulation conditions.

Hikaru Wakaura2026-03-03⚛️ quant-ph

Charging power enhancement at the phase transition of a non-integrable quantum battery

This study demonstrates that quantum phase transitions significantly enhance the charging power of non-integrable quantum batteries based on the Axial Next-Nearest-Neighbor Ising model, contrasting with integrable cases where such effects are absent at short timescales and providing insights for the design of practical many-qubit energy storage devices.

D. Farina, M. Sassetti, V. Cataudella + 2 more2026-03-03⚛️ quant-ph

Discrete-modulation continuous-variable quantum key distribution with probabilistic amplitude shaping over a linear quantum channel

This paper investigates a discrete-modulation continuous-variable quantum key distribution protocol employing probabilistic amplitude shaping with QAM over a linear quantum channel, demonstrating that it closely approaches the performance of the Gaussian-modulated GG02 benchmark in terms of secure key rates and distance while overcoming practical implementation difficulties.

Emanuele Parente, Michele N. Notarnicola, Stefano Olivares + 3 more2026-03-03⚛️ quant-ph

Toward multi-purpose quantum communication networks: from theory to protocol implementation

This paper presents a full-stack methodology and experimental implementation of quantum oblivious transfer and quantum tokens on the same hardware used for quantum key distribution, demonstrating the feasibility of transitioning from single-purpose networks to versatile, multi-purpose quantum communication systems.

Lucas Hanouz, Marc Kaplan, Jean-S�bastien Kersaint Tournebize + 2 more2026-03-03⚛️ quant-ph

QAOA-Predictor: Forecasting Success Probabilities and Minimal Depths for Efficient Fixed-Parameter Optimization

This paper introduces QAOA-Predictor, a Graph Neural Network model that accurately forecasts the success probabilities and minimal layer depths for Linear Ramp QAOA across diverse combinatorial optimization problems, enabling efficient fixed-parameter optimization without the need for costly runtime parameter tuning.

Rodrigo Coelho, Georg Kruse, Jeanette Miriam Lorenz2026-03-03⚛️ quant-ph