TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhys.16.1.033
TI  - Error-correcting codes for fermionic quantum simulation
PY  - 2024/01/26
UR  - https://www.scipost.org/SciPostPhys.16.1.033
JF  - SciPost Physics
JA  - SciPost Phys.
VL  - 16
IS  - 1
SP  - 033
A1  - Chen, Yu-An
AU  - Gorshkov, Alexey V.
AU  - Xu, Yijia
AB  - Utilizing the framework of $\mathbb{Z}_2$ lattice gauge theories in the context of Pauli stabilizer codes, we present methodologies for simulating fermions via qubit systems on a two-dimensional square lattice. We investigate the symplectic automorphisms of the Pauli module over the Laurent polynomial ring. This enables us to systematically increase the code distances of stabilizer codes while fixing the rate between encoded logical fermions and physical qubits. We identify a family of stabilizer codes suitable for fermion simulation, achieving code distances of d=2,3,4,5,6,7, allowing correction of any $\lfloor \frac{d-1}{2} \rfloor$-qubit error. In contrast to the traditional code concatenation approach, our method can increase the code distances without decreasing the (fermionic) code rate. In particular, we explicitly show all stabilizers and logical operators for codes with code distances of d=3,4,5. We provide syndromes for all Pauli errors and invent a syndrome-matching algorithm to compute code distances numerically.
ER  -

@Article{10.21468/SciPostPhys.16.1.033,
	title={{Error-correcting codes for fermionic quantum simulation}},
	author={Yu-An Chen and Alexey V. Gorshkov and Yijia Xu},
	journal={SciPost Phys.},
	volume={16},
	pages={033},
	year={2024},
	publisher={SciPost},
	doi={10.21468/SciPostPhys.16.1.033},
	url={https://scipost.org/10.21468/SciPostPhys.16.1.033},
}