Scalable entanglement stabilization with modular reservoir engineering
- URL: http://arxiv.org/abs/2301.05725v1
- Date: Fri, 13 Jan 2023 19:03:01 GMT
- Title: Scalable entanglement stabilization with modular reservoir engineering
- Authors: E. Doucet, L. C. G. Govia, A. Kamal
- Abstract summary: We present a family of protocols which employ fixed-depth qubit-qubit interactions alongside engineered linear dissipation to stabilize an $N$-qubit W state.
We find that a modular approach to dissipation engineering, with several overlapping few-qubit dissipators rather than a single $N$-qubit dissipator, is essential for our protocol to be scalable.
- Score: 0.8057006406834467
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Dissipation engineering is a powerful framework for quantum state preparation
and autonomous error correction in few-qubit systems. In this work, we examine
the scalability of this approach and give three criteria which any dissipative
state stabilization protocol should satisfy to be truly scalable as the number
of qubits grows. Besides the requirement that it can be constructed in a
resource-efficient manner from simple-to-engineer building blocks, a scalable
protocol must also exhibit favorable scaling of the stabilization time with the
increase in system size. We present a family of protocols which employ
fixed-depth qubit-qubit interactions alongside engineered linear dissipation to
stabilize an $N$-qubit W state. We find that a modular approach to dissipation
engineering, with several overlapping few-qubit dissipators rather than a
single $N$-qubit dissipator, is essential for our protocol to be scalable. With
this approach, as the number of qubits increases our protocol exhibits
low-degree polynomial scaling of the stabilization time and linear growth of
the number of control drives in the best case. While the proposed protocol is
most easily accessible with current state-of-the-art circuit-QED architectures,
the modular dissipation engineering approach presented here can be readily
adapted to other platforms and for stabilization of other interesting quantum
states.
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