Toward Stabilization of the Quantum Pair-Cat State on Superconducting Circuits Platform

In this thesis, we introduce a quantum circuit for stabilizing an error-correctable two-mode quantum cat state, known as the pair-cat state. Using Foster decomposition, we derive experimentally feasible circuit parameters that engineer a dominant fifth-order flux nonlinearity, yielding the effective Hamiltonian required for pair-cat state generation. We further present implementations of logical X rotations, show casing the possibility of rotating around the Bloch sphere and encoding quantum information.

Department dc:contributor.department

Chalmers tekniska högskola / Institutionen för mikroteknologi och nanovetenskap (MC2)

Year dc:date.issued

2026

Author dc:creator

• Jesper, Lagerberg

Advisor dc:contributor.supervisor

• Khanahmadi, Maryam

• pair-cat, non-Gaussian, quantum, superconducting

Language dc:language.iso

eng

Handle dc:identifier.uri

https://hdl.handle.net/20.500.12380/311465

OAI record oai:identifier

https://odr.chalmers.se/oai/request?verb=GetRecord&metadataPrefix=dim&identifier=oai%3Aodr.chalmers.se%3A20.500.12380%2F311465