Electrically Switchable Entanglement Channel in van der Waals Magnets

Yuan, H. Y.; Kamra, Akashdeep; Hartmann, Dion M. F.; Duine, R. A.

doi:10.1103/physrevapplied.16.024047

Cited by 7 publications

(8 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An insight from the obtained wave functions is that the magnetic excitations and ground states are found to harbor entanglement between spatially separated spins [21,160,161,229]. Various metrics, such as von Neumann entropy [161,162] and concurrence [160,229,230], have been employed in quantifying this entanglement content [138,231], as introduced above in Section 2.2. Special focus has been on antiferromagnets [161,229,230,232,233] which manifest very large squeeze parameters, and entanglement, due to exchange interaction causing the squeezing [21,161].…”

Section: Squeezed Statesmentioning

confidence: 99%

“…Various metrics, such as von Neumann entropy [161,162] and concurrence [160,229,230], have been employed in quantifying this entanglement content [138,231], as introduced above in Section 2.2. Special focus has been on antiferromagnets [161,229,230,232,233] which manifest very large squeeze parameters, and entanglement, due to exchange interaction causing the squeezing [21,161]. In contrast, relatively weak anisotropy leads to squeezing in ferromagnets.…”

Section: Squeezed Statesmentioning

confidence: 99%

“…The latter being an excited state can be absorbed by another system thereby transferring its quantum features. To address this issue, several proposals have focused on coupling two qubits with entangled spins of the magnetic ground state [160,161,230,252]. In this protocol, the qubits need to be decoupled from the magnet after achieving the desired entanglement.…”

Section: Squeezed Statesmentioning

confidence: 99%

“…Alternatively, Sharma et al studied the cooling of a magnetic sphere by a monochromatic laser source and found that the magnon distribution in the steady state is controlled by the light intensity through inelastic magnon-photon scattering [364]. An alternative way to tune the entanglement of magnons is to utilize the van der Waals magnets [230]. Van der Waals magnets are a class of magnetic materials with only one to a few magnetic monolayers, and the neighboring layers are coupled through van der Waals interactions [365][366][367][368].…”

Section: Magnon-magnon Entanglementmentioning

confidence: 99%

“…For a canted magnetic state induced by an in-plane magnetic field, as shown in Fig. 15(d), the effective magnon excitation is described by the following Hamiltonian [230]…”

Section: Magnon-magnon Entanglementmentioning

confidence: 99%

See 4 more Smart Citations

Quantum magnonics: when magnon spintronics meets quantum information science

Yuan

2022

Preprint

View full text Add to dashboard Cite

Spintronics and quantum information science are two promising candidates for innovating information processing technologies. The combination of these two fields enables us to build solid-state platforms for studying quantum phenomena and for realizing multi-functional quantum tasks. For a long time, however, the intersection of these two fields was limited due to the distinct properties of the classical magnetization, that is manipulated in spintronics, and quantum bits, that are utilized in quantum information science. This situation has changed significantly over the last few years because of the remarkable progress in coding and processing information using magnons. On the other hand, significant advances in understanding the entanglement of quasi-particles and in designing high-quality qubits and photonic cavities for quantum information processing provide physical platforms to integrate magnons with quantum systems. From these endeavours, the highly interdisciplinary field of quantum magnonics emerges, which combines spintronics, quantum optics and quantum information science. Here, we give an overview of the recent developments concerning the quantum states of magnons and their hybridization with mature quantum platforms. First, we review the basic concepts of magnons and quantum entanglement and discuss the generation and manipulation of quantum states of magnons, such as single-magnon states, squeezed states and quantum many-body states including Bose-Einstein condensation and the resulting spin superfluidity. We discuss how magnonic systems can be integrated and entangled with quantum platforms including cavity photons, superconducting qubits, nitrogen-vacancy centers, and phonons for coherent information transfer and collaborative information processing. The implications of these hybrid quantum systems for non-Hermitian physics and parity-time symmetry are highlighted, together with applications in quantum memories and high-precision measurements. Finally, we present an outlook on some of the challenges and opportunities in quantum magnonics.

show abstract

Section: Squeezed Statesmentioning

confidence: 99%

Section: Squeezed Statesmentioning

confidence: 99%

Section: Squeezed Statesmentioning

confidence: 99%

Section: Magnon-magnon Entanglementmentioning

confidence: 99%

“…For a canted magnetic state induced by an in-plane magnetic field, as shown in Fig. 15(d), the effective magnon excitation is described by the following Hamiltonian [230]…”

Section: Magnon-magnon Entanglementmentioning

confidence: 99%

See 3 more Smart Citations

Quantum magnonics: when magnon spintronics meets quantum information science

Yuan

2022

Preprint

View full text Add to dashboard Cite

show abstract

Quantum magnonics: When magnon spintronics meets quantum information science

et al. 2022

View full text Add to dashboard Cite

Topological magnon-photon interaction for cavity magnonics

Lee,

Hwang,

Lee

2023

Commun Phys

View full text Add to dashboard Cite

The study of cavity magnonics and topological insulators has made significant advances over the past decade, however the possibility of combining the two fields is still unexplored. Here, we explore such connection by investigating hybrid cavity systems that incorporate both a ferromagnet and a topological insulator. We find that electrons in the topological surface state efficiently mediate the effective electric dipole coupling between the spin of the ferromagnet and the electric field of the cavity, in contrast with the conventional cavity magnonics theory based on magnetic dipole coupling. We refer to this coupling as topological magnon-photon interaction, estimating it one order of magnitude stronger than the conventional magnon-photon coupling, and showing that its sign can be manipulated. We discuss the potential of our proposed device to allow for scaling down and controlling the cavity system using electronics. Our results provide solid ground for exploring the functionalities enabled by merging cavity magnonics with topological insulators.

show abstract

Electrically Switchable Entanglement Channel in van der Waals Magnets

Cited by 7 publications

References 34 publications

Quantum magnonics: when magnon spintronics meets quantum information science

Quantum magnonics: when magnon spintronics meets quantum information science

Quantum magnonics: When magnon spintronics meets quantum information science

Topological magnon-photon interaction for cavity magnonics

Contact Info

Product

Resources

About