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cond-mat.str-el2026
Bootstrap certification of string order in quantum spin chains
Sagnik Banerjee, Haoyu Guo, Debanjan Chowdhury
The many-body bootstrap certifies ground-state properties by minimizing energy over correlators constrained only by positivity, without any variational wavefunction. Its cost, howe…
cond-mat.str-el2026
Determinant Quantum-Quantum Monte Carlo: Coherent Auxiliary-Field Sampling
Xuepeng Wang, Sagnik Banerjee, Debanjan Chowdhury
We introduce determinant quantum-quantum Monte Carlo (DQMC), a quantum algorithm that lifts the auxiliary-field sampling and averaging at the operational core of determinant qu…