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quant-ph2026

Entangling Power and Symmetries in the Quantum Rabi Model

Ian Low, Jens Koch, Sahel Ashhab

The paper studies how the time‑averaged entangling power can detect both explicit and hidden symmetries in the quantum Rabi model, focusing on the Jaynes‑Cummings limit and the asy…

quant-ph2026

Physically motivated decompositions of single-qutrit gates

Aryan Iliat, Mark Byrd, Sahel Ashhab +1

Although only two quantum states of a physical system are often used to encode quantum information in the form of qubits, many levels can in principle be used to obtain qudits and…

quant-ph2026

Fractional squeezing: spectra and dynamics from generalized squeezing Hamiltonian with fractional orders

Sahel Ashhab

We generalize the generalized-squeezing problem to include fractional values of the squeezing order . This approach allows us to determine the locations of critical points at wh…

quant-ph2026

Is the most random pattern random? Maximizing localization in a two-dimensional lattice with engineered disorder

Morgan Berkane, Sahel Ashhab

We investigate localization in two models: a single particle in a two-dimensional square lattice described by the tight binding Hamiltonian, and a two-dimensional square qubit latt…

quant-ph2026

Computational and physical complexity of synthesizing random multi-qudit quantum states and unitary operators

Sahel Ashhab, Bora Basyildiz

We analyze the complexity of synthesizing random states and unitary operators in a multi-qudit system in two paradigms. In one case, we consider the situation in which we manipulat…

quant-ph2026

Reinforcement Learning for Robust Calibration of Multi-Qudit Quantum Gates

Amine Jaouadi, Sahel Ashhab

Higher-dimensional quantum systems, such as qudits, offer architectural and algorithmic advantages over qubits, but their increased spectral crowding and limited controllability re…