Physics

Demonstration of universal control between non-interacting qubits using the Quantum Zeno effect

E. Blumenthal, C. Mor, et al.

This groundbreaking research, conducted by E. Blumenthal, C. Mor, A. A. Diringer, L. S. Martin, P. Lewalle, D. Burgarth, K. B. Whaley, and S. Hacohen-Gourgy, reveals how the quantum Zeno effect can ingeniously create an entangling gate between non-interacting qubits using rapid projective measurements. The experimental demonstration with transmon qubits shows that even in the absence of direct interactions, effective quantum control is achievable.

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Abstract

This paper demonstrates that the quantum Zeno effect can be used to create an entangling gate between two non-interacting qubits. By applying rapid projective measurements, a single-qubit operation is transformed into a two-qubit entangling gate, even in the absence of direct qubit-qubit interaction. This is experimentally demonstrated using transmon qubits, where resonator-induced interactions are actively canceled. The gate works by imparting a geometric phase conditioned on the system's state within a specific non-local subspace.

Publisher

npj Quantum Information

Published On

Jul 25, 2022

Authors

E. Blumenthal, C. Mor, A. A. Diringer, L. S. Martin, P. Lewalle, D. Burgarth, K. B. Whaley, S. Hacohen-Gourgy

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