Continuous-time quantum walks on spatially correlated noisy lattices
Benedetti C; Borrelli M; Maniscalco S; Paris MGA; Rossi MAC
Continuous-time quantum walks on spatially correlated noisy lattices
Benedetti C
Borrelli M
Maniscalco S
Paris MGA
Rossi MAC
AMER PHYSICAL SOC
Julkaisun pysyvä osoite on:
https://urn.fi/URN:NBN:fi-fe2021042717742
https://urn.fi/URN:NBN:fi-fe2021042717742
Tiivistelmä
We address memory effects and diffusive properties of a continuous-time quantum walk on a one-dimensional percolation lattice affected by spatially correlated random telegraph noise. In particular, by introducing spatially correlated time-dependent fluctuations in nearest-neighbor hopping amplitudes, we describe random domains characterized by global noise. The resulting open dynamics of the walker is then unraveled by an ensemble average over all the noise realizations. Our results show that time-dependent noise assisted by spatial correlations leads to strong memory effects in the walker dynamics and to robust diffusive behavior against the detrimental action of uncorrelated noise. We also show that spatially correlated classical noise enhances localization breaking, thus making a quantum particle spread on longer distances across the lattice.
Kokoelmat
- Rinnakkaistallenteet [19207]