Back to Search
Start Over
Frobenius light cone and the shift unitary
- Publication Year :
- 2024
-
Abstract
- We bound the time necessary to implement the shift unitary on a one-dimensional ring, both using local Hamiltonians and those with power-law interactions. This time is constrained by the Frobenius light cone; hence we prove that shift unitaries are parametrically harder to implement than preparing long-range Bell pairs for sufficiently small power-law exponent. We note an intriguing similarity between the proof of our results, and the hardness of preparing symmetry-protected topological states with symmetry-preserving Hamiltonians.<br />Comment: 17 pages, 1 figure
Details
- Database :
- arXiv
- Publication Type :
- Report
- Accession number :
- edsarx.2402.07990
- Document Type :
- Working Paper