Dissipative production of controllable steady-state entanglement of two superconducting qubits in separated resonators
1 Department of Applied Physics, School of Science, Xi'an Jiaotong University - Xi'an 710049, PRC
2 Institute for Quantum Science and Engineering (IQSE) and Department of Physics and Astronomy, Texas A & M University - College Station, TX 77843-4242, USA
Received: 23 March 2015
Accepted: 13 May 2015
We propose an efficient method for dissipative preparation of controllable steady-state entanglement of two superconducting qubits coupled to spatially separated transmission line resonators, which are linked by an additional superconducting qubit acting as a tunable coupler. The quantum-state production process is based on a form of reservoir engineering, i.e., the dissipation of the coupler is utilized to steer the system into the desired state at stationary state. The distinct feature of our scheme is that neither initial state preparation nor unitary dynamics are required. These make the present protocol more feasible in the experimental implementation.
PACS: 03.67.Bg – Entanglement production and manipulation / 85.25.-j – Superconducting devices / 42.50.Lc – Quantum fluctuations, quantum noise, and quantum jumps
© EPLA, 2015