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This research demonstrates a novel method to steer quantum state distributions in non-disordered lattices using engineered dissipation, achieving over 95% fidelity in transitioning between localized and extended states. By utilizing phase-selective bond jump operators, the study provides a deterministic mechanism for controlling quantum behavior without altering fundamental material properties, which is critical for advancing photonic architectures and ultracold atomic gas platforms.

Sources coveringQuantum Zeitgeist, Quantum Computing Report, LessWrong, Latent Space

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Researchers Steer Quantum States Using Engineered Loss

Quantum ZeitgeistAugust 24, 20265 min read

Until now, controlling whether energy spreads or remains trapped within a material required altering its fundamental properties. Engineered dissipation offers an alternative, demonstrated here for one-dimensional lattices where selective ‘bond jumping’ steers systems towards either localized or extended states without changing core parameters. This establishes active control over quantum behaviour previously reliant on inherent disorder or lacked deterministic mechanisms.

Appropriately designed dissipation favours either localised or extended states within a purely non-disordered one-dimensional lattice. The foundational clean lattice exhibits spatially inhomogeneous hopping and sustains both extended bulk states alongside localised boundary states, encompassing an algebraically localised bound state in the continuum. A nonlocal bond jump operator with a tunable relative phase reveals a selective preference for eigenstates characterised by differing spatial phase correlations. Consequently, the prolonged-duration density matrix is steered toward portions governed by either localised or extended Hamiltonian eigenstates without chaos. Engineered Dissipation Enables High Fidelity Control of Quantum State Distributions Scientists at College of Mathematics and Physics, collaborating…

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