Averaging symmetric Z_N quantum circuits over random noise produces a noisy surface code whose logical information is protected against symmetric errors up to a threshold, with charge-sharpening transitions coinciding with bulk confinement transitions that differ for N≤4 versus N>4.
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Real-time renormalization group on quantum operations produces chaotic flows in coherent-dominant regimes, and the measurement-induced PT transition belongs to the 1D Yang-Lee edge singularity universality class.
Measurements enhance steady-state entanglement in a paired fermionic chain by suppressing pairing correlations, but the enhancement scales as ln squared L and vanishes in the thermodynamic limit.
Bayesian post-correction of non-Markovian errors enables Heisenberg scaling F_eff = O(N^2) in bosonic lattice gravimetry when L >= ell + 2 modes.
Analytical and numerical study of stabilizer nullity and Rényi entropies in monitored Clifford circuits shows quantized decay for computational measurements and size-dependent relaxation to a non-trivial steady state for rotated bases.
A minimally invasive pair of weak measurements on an atomic BEC yields the two-time density-density correlation function (Van Hove function) and its Fourier transform, the dynamical structure factor.
Monitored free fermions are mapped to a nonlinear sigma model whose finite-time evolution and quasi-1D long-time scaling are used to locate the measurement-induced transition and extract the correlation-length exponent in two dimensions.
Disorder does not alter the presence or absence of measurement-induced phase transitions in noninteracting fermions; the long-time behavior is controlled by the same nonlinear sigma model with renormalized parameters.
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Holographically Emergent Gauge Theory in Symmetric Quantum Circuits
Averaging symmetric Z_N quantum circuits over random noise produces a noisy surface code whose logical information is protected against symmetric errors up to a threshold, with charge-sharpening transitions coinciding with bulk confinement transitions that differ for N≤4 versus N>4.
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Renormalization of Quantum Operations: Parity-Time Transition and Chaotic Flows
Real-time renormalization group on quantum operations produces chaotic flows in coherent-dominant regimes, and the measurement-induced PT transition belongs to the 1D Yang-Lee edge singularity universality class.
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Measurement-enhanced entanglement in a monitored superconducting chain
Measurements enhance steady-state entanglement in a paired fermionic chain by suppressing pairing correlations, but the enhancement scales as ln squared L and vanishes in the thermodynamic limit.
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Bayesian post-correction of non-Markovian errors in bosonic lattice gravimetry
Bayesian post-correction of non-Markovian errors enables Heisenberg scaling F_eff = O(N^2) in bosonic lattice gravimetry when L >= ell + 2 modes.
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Rise and fall of nonstabilizerness via random measurements
Analytical and numerical study of stabilizer nullity and Rényi entropies in monitored Clifford circuits shows quantized decay for computational measurements and size-dependent relaxation to a non-trivial steady state for rotated bases.
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Repeated weak measurements: watching quantum correlations evolve
A minimally invasive pair of weak measurements on an atomic BEC yields the two-time density-density correlation function (Van Hove function) and its Fourier transform, the dynamical structure factor.
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Quantum dynamics of monitored free fermions: Evolution of quantum correlations and scaling at measurement-induced phase transition
Monitored free fermions are mapped to a nonlinear sigma model whose finite-time evolution and quasi-1D long-time scaling are used to locate the measurement-induced transition and extract the correlation-length exponent in two dimensions.
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Measurement-induced phase transitions in disordered fermions
Disorder does not alter the presence or absence of measurement-induced phase transitions in noninteracting fermions; the long-time behavior is controlled by the same nonlinear sigma model with renormalized parameters.