Autonomous stabilization of many-body entanglement with Floquet Hamiltonians and weak measurement
Abstract
Reaching a technological advantage with large quantum systems requires safeguarding their many-body entanglement. Dissipation typically acts to decohere a quantum system via random projective noise but, when judiciously engineered together with coherent interactions, it can funnel the system towards a target entangled state. The native interactions and dissipative channels available to most systems are, however, difficult to combine effectively. Here we propose interleaving Floquet Hamiltonian engineering, which allows the construction of non-native coherent interactions, with weak measurement, which enables a tuneable dissipative channel, to enable programmable and autonomous stabilization of many-body entanglement. We show this analytically and numerically for the central-spin system of a semiconductor quantum dot, for which we construct spin-squeezed and Schrödinger-cat states that are stabilized against realistic levels of dephasing. Our approach is applicable to any system compatible with periodic drives and tuneable measurement strength and could enable novel approaches to practical error correction.
Related
- Resonance and Transition-Channel Competition in Cavity-Assisted Floquet-State Stabilization
- Sharp universal death of entanglement threshold for Pauli Hamiltonians
- Measurement protocol for non-adiabatic geometric phases of Floquet states
- Entanglement dynamics after quenches with inhomogeneous Hamiltonians
- Fixed Points, Floquet Entanglement Asymmetry, and Quantum Mpemba Effects
BibTeX
@misc{franke2026autonomous,
title = {{Autonomous stabilization of many-body entanglement with Floquet Hamiltonians and weak measurement}},
author = {Charlotte Franke and Dorian A. Gangloff},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.21086},
eprint = {2609.21086},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.21086},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Autonomous stabilization of many-body entanglement with Floquet Hamiltonians and weak measurement
AU - Charlotte Franke
AU - Dorian A. Gangloff
PY - 2026
DA - 2026/09/17
PB - arXiv
DO - 10.48550/arxiv.2609.21086
UR - https://arxiv.org/abs/2609.21086
AB - Reaching a technological advantage with large quantum systems requires safeguarding their many-body entanglement. Dissipation typically acts to decohere a quantum system via random projective noise but, when judiciously engineered together with coherent interactions, it can funnel the system towards a target entangled state. The native interactions and dissipative channels available to most systems are, however, difficult to combine effectively. Here we propose interleaving Floquet Hamiltonian engineering, which allows the construction of non-native coherent interactions, with weak measurement, which enables a tuneable dissipative channel, to enable programmable and autonomous stabilization of many-body entanglement. We show this analytically and numerically for the central-spin system of a semiconductor quantum dot, for which we construct spin-squeezed and Schrödinger-cat states that are stabilized against realistic levels of dephasing. Our approach is applicable to any system compatible with periodic drives and tuneable measurement strength and could enable novel approaches to practical error correction.
ER -