Temporal magnon-qubit Mach-Zehnder interferometry
ORAL
Abstract
Advances in quantum magnonics1–3, such as single magnon sources2 and methods for strong on-chip magnon-photon coupling3, enable novel quantum magnonic experiments.
We propose a temporal magnon-qubit Mach-Zehnder (MZ) interferometer via a simple measurement scheme based on entangling magnon and qubit states. The states evolve freely in a large detuning. Magnetic pulses decrease detuning to couple the states temporarily and controllably entangle or unentangle them.
The scheme is as follows. In an unentangled system, the qubit is excited. Then, a magnetic pulse entangles the system. After freely evolving for time τ, an “unentangling” pulse is received. Finally, the qubit is measured. Analogous to typical MZ interferometry, the interference pattern of the final qubit population carries information about the magnon dynamics. When τ compares to the magnon lifetime, it describes single magnon decoherence.
In summary, we proposed a temporal magnon-qubit MZ interferometer. This may help answer fundamental questions of quasi-particle decoherence at single quantum levels and enable single magnon applications.
1D. D. Awschalom et al., IEEE Trans. Quantum Eng. 2 5500836 (2021).
2A. V. Chumak et al., IEEE Trans. Magn. 58 6 0800172 (2022).
3P. G. Baity et al., Appl. Phys. Lett. 119 033502 (2021).
We propose a temporal magnon-qubit Mach-Zehnder (MZ) interferometer via a simple measurement scheme based on entangling magnon and qubit states. The states evolve freely in a large detuning. Magnetic pulses decrease detuning to couple the states temporarily and controllably entangle or unentangle them.
The scheme is as follows. In an unentangled system, the qubit is excited. Then, a magnetic pulse entangles the system. After freely evolving for time τ, an “unentangling” pulse is received. Finally, the qubit is measured. Analogous to typical MZ interferometry, the interference pattern of the final qubit population carries information about the magnon dynamics. When τ compares to the magnon lifetime, it describes single magnon decoherence.
In summary, we proposed a temporal magnon-qubit MZ interferometer. This may help answer fundamental questions of quasi-particle decoherence at single quantum levels and enable single magnon applications.
1D. D. Awschalom et al., IEEE Trans. Quantum Eng. 2 5500836 (2021).
2A. V. Chumak et al., IEEE Trans. Magn. 58 6 0800172 (2022).
3P. G. Baity et al., Appl. Phys. Lett. 119 033502 (2021).
–
Presenters
-
Cody A Trevillian
Oakland University
Authors
-
Cody A Trevillian
Oakland University
-
Vasyl S Tyberkevych
Oakland University