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- W3180862617 abstract "We investigate the possibilities for a deterministic conversion between two important types of maximally-entangled multiqubit states -- namely, W and Greenberger-Horne-Zeilinger (GHZ) states -- in the Rydberg-blockade regime of a neutral-atom system where each atom is subject to four external laser pulses. Such interconversions between W states and their GHZ counterparts have quite recently been addressed using the method of shortcuts to adiabaticity, more precisely techniques based on Lewis-Riesenfeld invariants [R.-H. Zheng {em et al.}, Phys. Rev. A {bf 101}, 012345 (2020)]. Motivated in part by this recent work, we revisit the W-to-GHZ state-conversion problem using a fundamentally different approach, which is based on the dynamical symmetries of the system and a Lie-algebraic parametrization of its permissible evolutions. In contrast to the previously used invariant-based approach, which leads to a state-conversion protocol characterized by strongly time-dependent Rabi frequencies of external lasers, ours can also yield one with time-independent Rabi frequencies. This feature makes our protocol more easily applicable experimentally, with the added advantage that it allows the desired state conversion to be carried out in a significantly shorter time." @default.
- W3180862617 created "2021-07-19" @default.
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- W3180862617 date "2020-12-30" @default.
- W3180862617 modified "2023-09-23" @default.
- W3180862617 title "W-to-GHZ state conversion in the Rydberg-blockade regime of neutral-atom systems: dynamical-symmetry-based approach" @default.
- W3180862617 hasPublicationYear "2020" @default.
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