Speaker
Description
Two-qubit entangled states are usually generated by a two-step process: first, the qubits are dissipatively initialised by optical pumping into a separable state, and then the entanglement is generated through a unitary transformation. However, entangled states can also be generated directly using dissipative engineering [1]. We propose and implement a novel scheme for what can be described as “optical pumping into a maximally entangled state”. We apply the method to deterministically prepare two trapped 40Ca+ ions in a maximally entangled singlet state with a fidelity of 93(1)% [2].
References
[1] Y. Lin, J. P. Gaebler, T. R. Tan, R. Bowler, D. Leibfried, and D. J. Wineland, Dissipative production of a maximally entangled steady state of two quantum bits, Nature 504, 415 – 418 (2013)
[2] arXiv: 2107.10374
