Engineering qubit coupling to reservoir mode: Optimizing circuitry to extend coherence time
Chinese Journal of Physics, cilt.90, ss.1005-1014, 2024 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 90
- Basım Tarihi: 2024
- Doi Numarası: 10.1016/j.cjph.2024.02.047
- Dergi Adı: Chinese Journal of Physics
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, INSPEC, zbMATH
- Sayfa Sayıları: ss.1005-1014
- Anahtar Kelimeler: Coherence time, Quantum theory, Qubit, Reservoir modes
- Ankara Yıldırım Beyazıt Üniversitesi Adresli: Evet
Özet
The research investigates how reservoir modes influence the decay and dephasing rates of a qubit, utilizing a circuit model where the qubit interacts with N distinct oscillators. The Lagrangian and Hamiltonian of the system are deduced theoretically, and the analysis delves into how circuit components like the qubit and coupling capacitors affect the decay rate. Notably, the study reveals that the coupling capacitor exerts a more pronounced influence on the relaxation time compared to the qubit capacitor. Moreover, it quantifies the repercussions of bosonic modes affected by coupling to reservoir modes on the qubit coherence time. As a result, the primary objective of the investigation is to examine the impact of circuit elements on qubit behavior, offering valuable insights into the determinants of qubit decay and dephasing rates.