  The high-temperature superconducting cuprates are governed by intertwined
striped magnetic and charge orders in addition to superconductivity. Remarkably
similar behavior has also been seen in numerical calculations for the Hubbard
model describing the copper-oxygen layers in these materials. Finite cluster
methods typically find that spin and charge stripe order dominates, while
embedded quantum cluster methods, which access the thermodynamic limit, often
conclude that superconductivity does. Here, we report the observation of
fluctuating spin and charge stripes in an embedded cluster calculation for the
Hubbard model. This discovery demonstrates that striped states survive in the
thermodynamic limit and allows us to study their influence on the model's
superconducting properties, where we find evidence for pair-density-wave
correlations intertwined with the stripe correlations.
