First experimental observation of strong-to-weak spontaneous symmetry breaking in dephased fermionic atoms, detected via long-range Rényi order after a superlattice-driven metal-insulator transition.
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Gutzwiller mean-field theory on the monitored 3D Bose-Hubbard model shows that a trajectory-averaged local order parameter for strong-to-weak symmetry breaking becomes critical at the same measurement strength as charge sharpening, with ν ≃ 1.2.
Introduces a local one-point fidelity correlator to define SW-SSB, preserving key features like channel stability and long-range conditional mutual information while enabling detection in large and thermodynamic-limit systems.
Long-range Rényi-1 SWSSB order implies extensive block-charge variance for continuous symmetries with rapid asymptotic approach, with conditional counterexamples and a new twist overlap correlator separating symmetry channels and linking to skew information.
Locally stable states are equivalent to short-range correlated states and define phases invariant under locally reversible channels, with decay of nonlinear correlators and links to canonical purifications.
Constructs a manifestly diagonal-BRST-invariant Schwinger-Keldysh path integral for open non-Abelian gauge theories with arbitrary physical initial states, yielding Ward-Takahashi-Slavnov-Taylor identities and a Keldysh BRST symmetry for the Open EFT.
Symmetry class alone sets SWSSB correlation length growth to exponential (Z2, tc ~ ln L) or algebraic (U(1), tc ~ L^alpha with alpha filling-dependent) in open quantum systems, independent of spectral gap.
SW-SSB extends symmetry breaking to mixed states and serves as a unifying perspective connecting topological orders, emergent hydrodynamics, and information-theoretic characterizations of phases in open systems.
Lectures summarizing the construction of hydrodynamic EFTs through strong-to-weak symmetry breaking, with examples from spin chains to relativistic QFTs and UV/IR constraints on transport coefficients.
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Observation of Strong-to-Weak Spontaneous Symmetry Breaking in a Dephased Fermi Gas
First experimental observation of strong-to-weak spontaneous symmetry breaking in dephased fermionic atoms, detected via long-range Rényi order after a superlattice-driven metal-insulator transition.
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A mean-field description of strong-to-weak symmetry breaking in the monitored three-dimensional Bose-Hubbard model
Gutzwiller mean-field theory on the monitored 3D Bose-Hubbard model shows that a trajectory-averaged local order parameter for strong-to-weak symmetry breaking becomes critical at the same measurement strength as charge sharpening, with ν ≃ 1.2.