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quant-ph2026
Time-reversal-based quantum metrology in a central-spin architecture: from SATIN to butterfly echo
Aditya Kumar, Sayan Choudhury
We investigate quantum-enhanced time-reversal-based metrology using the central spin model, in which a single ancilla spin of magnitude mediates interactions between…
quant-ph2026
Robust continuous symmetry breaking and multiversality in the chiral Dicke model
Nikolay Yegovtsev, Sayan Choudhury, W. Vincent Liu
The Dicke model (DM) serves as a paradigm for understanding collective light-matter interactions. We introduce the chiral Dicke model, a generalization where an atomic ensemble cou…