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19922026
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quant-ph2026

Metropolitan entanglement distribution between an atom and a near-visible photon

Maya Büki, Pooja Malik, Florian Fertig +9

Entanglement distribution is the overarching purpose of quantum networks. While communication over long distances can use deployed fiber infrastructure, it requires photons in the…

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

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

Constrained Quantum Optimization via Iterative Warm-Start XY-Mixers

David Bucher, Maximilian Janetschek, Michael Poppel +3

The Quantum Approximate Optimization Algorithm (QAOA) is a leading hybrid heuristic for combinatorial optimization, but efficiently handling hard constraints remains a significant…

quant-ph2026

Plethysm is in #BQP

Matthias Christandl, Aram W. Harrow, Greta Panova +2

Some representation-theoretic multiplicities, such as the Kostka and the Littlewood-Richardson coefficients, admit a combinatorial interpretation that places their computation in t…