Manifolds of exceptional points and effective Zeno limit of an open two-qubits system

Popkov, Vladislav (avtor), Presilla, Carlo (avtor), Salerno, Mario (avtor)

We analytically investigate the Liouvillian exceptional point manifolds (LEPMs) of a two-qubits open system, where one qubit is coupled to a dissipative polarization bath. Exploiting a $Z_2$ symmetry, we block diagonalize the Liouvillian and show that one symmetry block yields two planar LEPMs while the other one exhibits a more intricate, multisheet topology. The intersection curves of these manifolds provide a phase diagram for effective Zeno transitions at small dissipation. These results are consistent with a perturbative extrapolation from the strong Zeno regime. Interestingly, we find that the fastest relaxation to the nonequilibrium steady state occurs on LEPMs associated with the transition to the effective Zeno regime.

• Jezik: Angleški jezik
• Ključne besede: nonequilibrium statistical mechanics, quantum statistical mechanics, open quantum systems
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FMF - Fakulteta za matematiko in fiziko
• Status publikacije: Objavljeno
• Različica publikacije: Recenzirani rokopis
• Leto izida: 2025
• Št. strani: Str. L050202-1-L050202-6
• Številčenje: Vol. 111, iss. 5
• PID: 20.500.12556/RUL-175244
• UDK: 536.9
• ISSN pri članku: 2469-9926
• DOI: 10.1103/PhysRevA.111.L050202
• COBISS.SI-ID: 254357763
• Datum objave v RUL: 22.10.2025

Gradivo je del revije

• Naslov: Physical review
• Založnik: American Physical Society
• ISSN: 2469-9926
• COBISS.SI-ID: 2996836

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: neravnovesna statistična mehanika, kvantna statistična mehanika, odprti kvantni sistemi