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

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

URL: http://arxiv.org/abs/2108.08549v4
Date: Thu, 16 Dec 2021 07:16:46 GMT
Title: Demonstration of universal control between non-interacting qubits using the Quantum Zeno effect
Authors: Eliya Blumenthal, Chen Mor, Asaf A. Diringer, Leigh S. Martin, Philippe Lewalle, Daniel Burgarth, K. Birgitta Whaley and Shay Hacohen-Gourgy
Abstract summary: The Zeno effect occurs in quantum systems when a very strong measurement is applied. We show that such a measurement can turn a single-qubit operation into a two- or multi-qubit entangling gate, even in a non-interacting system.
Score: 0.0
License: http://creativecommons.org/licenses/by/4.0/
Abstract: The Zeno effect occurs in quantum systems when a very strong measurement is applied, which can alter the dynamics in non-trivial ways. Despite being dissipative, the dynamics stay coherent within any degenerate subspaces of the measurement. Here we show that such a measurement can turn a single-qubit operation into a two- or multi-qubit entangling gate, even in a non-interacting system. We demonstrate this gate between two effectively non-interacting transmon qubits. Our Zeno gate works by imparting a geometric phase on the system, conditioned on it lying within a particular non-local subspace. These results show how universality can be generated not only by coherent interactions as is typically employed in quantum information platforms, but also by Zeno measurements.

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