Magnon-assisted photon-phonon conversion in the presence of structured environments

Qi, Shi-fan; Jing, Jun

doi:10.1103/physreva.103.043704

Cited by 43 publications

(21 citation statements)

References 51 publications

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“…6, we compare the systematic-error sensitivity in various state-transfer protocols, including the flat π pulse (see the blue solid lines), the transitionless quantum driving protocol described by the parametric functions in Eq. (26) (see the red dashed lines), and the optimized protocol based on the LR-invariant described by Eq. (61) (see the orange dotted lines).…”

Section: Invariant-based Inverse Engineeringmentioning

confidence: 99%

“…Active investigations about magnon-based quantum information transfer focus on the coupling between photons and magnons and that between magnons and phonons in the ferrimagnetic material. Typical applications of these couplings include the hybrid entanglement and steering [22][23][24][25], the photonphonon interface [26,27], and the magnomechanical phonon laser [28].…”

Section: Introductionmentioning

confidence: 99%

“…That enables the storage-and-transfer of the microwave photonic and magnonic states as long-lasting modes, constituting a key step for the future quantum communication networks [29]. Inspired by the light-matter interface implemented within the cavity QED [30,31], the optomechanical systems [32][33][34], and the optical waveguides [35], * jingjun@zju.edu.cn the stimulated Raman adiabatic passage between photon and phonon [27] and the magnon-assisted photonphonon conversion [26] have been proposed in the cavity magnomechanical systems. These protocols however demand a long evolution time and then the quantum system is prone to decoherence.…”

Section: Introductionmentioning

confidence: 99%

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Accelerated adiabatic passage in cavity magnomechanics

Qi,

Jing

2022

Preprint

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Cavity magnomechanics provides a readily-controllable hybrid system, that consisted of cavity mode, magnon mode, and phonon mode, for quantum state manipulation. To implement a fastand-robust state transfer between the hybrid photon-magnon mode and the phonon mode, we propose two accelerated adiabatic-passage protocols individually based on the counterdiabatic Hamiltonian for transitionless quantum driving and the Levis-Riesenfeld invariant for inverse engineering. Both the counterdiabatic Hamiltonian and the Levis-Riesenfeld invariant generally apply to the continuous-variable systems with arbitrary target states. It is interesting to find that our counterdiabatic Hamiltonian can be constructed in terms of the creation and annihilation operators rather than the system-eigenstates and their time-derivatives. Our protocol can be optimized with respect to the stability against the systematic errors of coupling strength and frequency detuning. It contributes to a quantum memory for photonic and magnonic quantum information. We also discuss the effects from dissipation and the counter-rotating interactions.

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Section: Invariant-based Inverse Engineeringmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Accelerated adiabatic passage in cavity magnomechanics

Qi,

Jing

2022

Preprint

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“…We consider the situation where the frequency of the phonon mode is much lower than that of the magnon mode [9,22,23], such that they couple via a radiation pressure-like dispersive interaction. Such a nonlinear coupling has been recognized as a cornerstone of many quantum protocols [28][29][30][31][32][33][34][35][36][37][38][39][40][41][42]. Relevant experiments have demonstrated magnomechanically induced transparency/absorption [22] and mechanical cooling/lasing [23].…”

Section: The Protocolmentioning

confidence: 99%

Optical sensing of magnons via the magnetoelastic displacement

Fan,

Shen,

Wang

et al. 2021

Preprint

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We show how to measure a steady-state magnon population in a magnetostatic mode of a ferrimagnet, such as yttrium iron garnet. We adopt an optomechanical approach and utilize the magnetoelasticity of the ferrimagnet. The magnetostrictive force dispersively couples magnons to the deformation displacement of the ferrimagnet, which is proportional to the magnon population. By further coupling the mechanical displacement to an optical cavity that is resonantly driven by a weak laser, the magnetostrictively induced displacement can be sensed by measuring the phase quadrature of the optical field. The phase shows an excellent linear dependence on the magnon population for a not very large population, and can thus be used as a 'magnometer' to measure the magnon population. We further study the effect of thermal noises, and find a high signal-to-noise ratio even at room temperature. At cryogenic temperatures, the resolution of magnon excitation numbers is essentially limited by the vacuum fluctuations of the phase, which can be significantly improved by using a squeezed light.

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“…However, a major obstacle for such a magnon-based quantum network is that its coherence time is limited by its intrinsic loss (typically with damping rate γ m /2π ∼ 1 MHz), and is in the order of 1 µs for YIG. The coherence time can indeed be significantly extended by transferring the magnonic quantum state to the mechanical mode (i.e., the vibrational phonon mode) of the same YIG ferrimagnet [44][45][46][47], which can act as a long-lived quantum memory [48,49]. However, this local operation via magnomechanics does not allow to build a quantum network with its nodes distributed in a long distance.…”

Section: Introductionmentioning

confidence: 99%

Quantum network with magnonic and mechanical nodes

Wang

et al. 2021

Preprint

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A quantum network consisting of magnonic and mechanical nodes connected by light is proposed. Recent years have witnessed a significant development in cavity magnonics based on collective spin excitations in ferrimagnetic crystals, such as yttrium iron garnet (YIG). Magnonic systems are considered to be a promising building block for a future quantum network. However, a major limitation of the system is that the coherence time of the magnon excitations is limited by their intrinsic loss (typically in the order of 1 µs for YIG). Here, we show that by coupling the magnonic system to a mechanical system using optical pulses, an arbitrary magnonic state (either classical or quantum) can be transferred to and stored in a distant long-lived mechanical resonator. The fidelity depends on the pulse parameters and the transmission loss. We further show that the magnonic and mechanical nodes can be prepared in a macroscopic entangled state. These demonstrate the quantum state transfer and entanglement distribution in such a novel quantum network of magnonic and mechanical nodes.Our work shows the possibility to connect two separate fields of optomagnonics and optomechanics, and to build a long-distance quantum network based on magnonic and mechanical systems.

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Magnon-assisted photon-phonon conversion in the presence of structured environments

Cited by 43 publications

References 51 publications

Accelerated adiabatic passage in cavity magnomechanics

Accelerated adiabatic passage in cavity magnomechanics

Optical sensing of magnons via the magnetoelastic displacement

Quantum network with magnonic and mechanical nodes

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