Quantum Sensing of Antiferromagnetic Magnon Two-Mode Squeezed Vacuum
arXiv:2402.13203 · doi:10.1103/PhysRevB.109.174410
Abstract
Néel ordered antiferromagnets exhibit two-mode squeezing such that their ground state is a nonclassical superposition of magnon Fock states. Here we theoretically demonstrate that antiferromagnets can couple to spin qubits via direct dispersive interaction stemming from, e.g., interfacial exchange. We demonstrate that this kind of coupling induces a magnon number dependent level splitting of the excited state resulting in multiple system excitation energies. This series of level splittings manifests itself as nontrivial excitation peaks in qubit spectroscopy thereby revealing the underlying nonclassical magnon composition of the antiferromagnetic quantum state. By appropriately choosing the drive or excitation energy, the magnonic state can be controlled via the qubit, suggesting that Fock states of magnon pairs can be generated deterministically. This enables achieving states useful for quantum computing and quantum information science protocols.
Accepted version, 13 pages, 3 figures
References in corpus (14)
- Quantum Computing
- Resolving photon number states in a superconducting circuit
- Squeezed Optomechanics with Phase-matched Amplification and Dissipation
- Dispersive regime of circuit QED: photon-dependent qubit dephasing and relaxation rates
- Scaling behavior of the spin pumping effect in ferromagnet/platinum bilayers
- Spin convertance at magnetic interfaces
- Dissipation-based Quantum Sensing of Magnons with a Superconducting Qubit
- Electric-Field-Controlled Antiferromagnetic Spintronic Devices
- Interfacial Spin and Heat Transfer between Metals and Magnetic Insulators
- Quantum sensing and imaging of spin-orbit-torque-driven spin dynamics in noncollinear antiferromagnet Mn3Sn
- Magnon-squeezing as a niche of quantum magnonics
- Spin pumping and shot noise in ferrimagnets: bridging ferro- and antiferromagnets
- Magnetic properties of hematite revealed by an ab initio parameterized spin model
- Magnon Transport in the Presence of Antisymmetric Exchange in a Weak Antiferromagnet