Adiabatically modeling quantum gates with two-site Heisenberg spins chain: Noise vs interferometry
| Autor: | Martin Tchoffo, Lukong Cornelius Fai, M. N. Jipdi |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Physics
Spins Quantum limit Quantum noise 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Noise (electronics) Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Quantum gate Quantum error correction Quantum mechanics Quantum process Quantum electrodynamics 0103 physical sciences Quantum algorithm 010306 general physics 0210 nano-technology |
| Zdroj: | Physica E: Low-dimensional Systems and Nanostructures. 96:36-45 |
| ISSN: | 1386-9477 |
| DOI: | 10.1016/j.physe.2017.09.023 |
| Popis: | We study the Landau Zener (LZ) dynamics of a two-site Heisenberg spin chain assisted with noise and focus on the implementation of logic gates via the resulting quantum interference. We present the evidence of the quantum interference phenomenon in triplet spin states and confirm that, three-level systems mimic Landau-Zener-Stuckelberg (LZS) interferometers with occupancies dependent on the effective phase. It emerges that, the critical parameters tailoring the system are obtained for constructive interferences where the two sets of the chain are found to be maximally entangled. Our findings demonstrate that the enhancement of the magnetic field strength suppresses noise effects; consequently, the noise severely impacts the occurrence of quantum interference for weak magnetic fields while for strong fields, quantum interference subsists and allows the modeling of universal sets of quantum gates. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect