- Roch, N;
- Schwartz, ME;
- Motzoi, F;
- Macklin, C;
- Vijay, R;
- Eddins, AW;
- Korotkov, AN;
- Whaley, KB;
- Sarovar, M;
- Siddiqi, I
The creation of a quantum network requires the distribution of coherent information across macroscopic distances. We demonstrate the entanglement of two superconducting qubits, separated by more than a meter of coaxial cable, by designing a joint measurement that probabilistically projects onto an entangled state. By using a continuous measurement scheme, we are further able to observe single quantum trajectories of the joint two-qubit state, confirming the validity of the quantum Bayesian formalism for a cascaded system. Our results allow us to resolve the dynamics of continuous projection onto the entangled manifold, in quantitative agreement with theory.