Dynamically Preparing Robust Bell States in Su-Schrieffer-Heeger Systems

• URL: http://arxiv.org/abs/2508.17040v1
• Date: Sat, 23 Aug 2025 14:41:36 GMT
• Title: Dynamically Preparing Robust Bell States in Su-Schrieffer-Heeger Systems
• Authors: Jia-Nan Wu, Bingsuo Zou, Guojun Jin, Yongyou Zhang,
• Abstract summary: We propose a framework for preparing robust Bell states using time-boundary engineering and momentum-space projective measurements.<n>We show that the prepared Bell states exhibit remarkable robustness against both environmental decoherence and parametric time fluctuations.<n>This time-boundary engineering framework is applicable to both fermionic and bosonic excitations, offering a robust paradigm for generating Bell states in quantum communication and quantum computation.
• Score: 0.9299655616863539
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Quantum entanglement is essential for modern quantum information processing. Entanglement gates convert initially non-entangled states into entangled ones by applying time-dependent parametric pulses. While Bell state preparation has been experimentally validated in various platforms, its stability and fidelity are constrained by environmental decoherence and parametric fluctuations.Here, we propose a dynamical framework for preparing robust Bell states by leveraging time-boundary engineering and momentum-space projective measurements within Su-Schrieffer-Heeger (SSH) systems. Employing Lindblad master equation, we theoretically demonstrate that the prepared Bell states exhibit remarkable robustness against both environmental decoherence and parametric time fluctuations, achieving a nearly perfect quantum fidelity, with momentum conservation law governing this robust behavior. To enrich Bell states in momentum space, multi-band SSH models are designed to induce multifold time scattering processes. This time-boundary engineering framework is applicable to both fermionic and bosonic excitations, offering a robust paradigm for generating Bell states in quantum communication and quantum computation.

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