Engineering synthetic squeezing for stabilizing remote entanglement between superconducting qubits

Realizing distance-independent remote entanglement is of fundamental interest and is crucial for realizing quantum networks. Quantum reservoir engineering is a powerful approach for generating and stabilizing an entangled state using carefully engineered system-bath interactions. One promising way to achieving entanglement in this way is by engineering a joint two-mode squeezed vacuum (TMSV) bath seen by the qubits. This method can be scaled and allows for entanglement stabilization using only local operations [1]. However, generating and injecting squeezed radiation into the system is both inefficient and vulnerable to photon loss. To overcome this, we consider a synthetic squeezing scheme, achieved by parametric driving [2]. In this talk, we consider the experimental implementation of this idea. To this end, we study single qubit dynamics driven by a synthetic squeezed vacuum, and we discuss our efforts towards stabilizing remote entanglement in a synthetic TMSV environment. Our simulations and preliminary measurements suggest that entanglement stabilization in a synthetic TMSV bath is experimentally achievable.

[1] Kraus, B et.al Phys. Rev. Lett. 92, 013602 (2004)

[2] Govia, L.C.G. et.al Phys. Rev. Res. 4, 023010 (2022)