Correct XY Hamiltonian interaction term

pasqal-io / Pulser

Library for pulse-level/analog control of neutral atom devices. Emulator with QuTiP.

Apache License 2.0

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Closed HGSilveri closed 1 month ago

HGSilveri commented 1 month ago

There was a wrong factor of /2 in the XY interaction term: what should have been (1 - 3*cos**2) was rather (1 - 3*cos**2) / 2. This PR:

Removes that factor
Calculates the cosine with the quantization axis more generically
Updates the tutorial using the XY mode to accomodate for the higher interaction strength

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