Accelerated adiabatic passage in cavity magnomechanics

Qi, Shi-fan; Jing, Jun

doi:10.48550/arxiv.2201.12536

Cited by 2 publications

(3 citation statements)

References 55 publications

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“…[28], where an STA approach based on counter-diabatic driving and unitary transformations to get rid of terms difficult to implement [29] was applied, see also ref. [30]. A detailed comparison will be carried out elsewhere.…”

Section: Discussionmentioning

confidence: 99%

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Inverse engineering of fast state transfer among coupled oscillators

Lu,

Lizuain,

Muga

2022

Preprint

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We design faster-than-adiabatic state transfers (switching of quantum numbers) in time-dependent coupled-oscillator Hamiltonians. The manipulation to drive the process is found using a twodimensional invariant recently proposed in S. Simsek and F. Mintert, Quantum 5 (2021) 409, and involves both rotation and transient scaling of the principal axes of the potential in a Cartesian representation. Importantly, this invariant is degenerate except for the subspace spanned by its ground state. Such degeneracy, in general, allows for infidelities of the final states with respect to ideal target eigenstates. However, the value of a single control parameter can be chosen so that the state switching is perfect for arbitrary (not necessarily known) initial eigenstates. Additional 2D linear invariants are used to find easily the parameter values needed and to provide generic expressions for the final states and final energies. In particular we find time-dependent transformations of a two-dimensional harmonic trap for a particle (such as an ion or neutral atom) so that the final trap is rotated with respect to the initial one, and eigenstates of the initial trap are converted into rotated replicas at final time, in some chosen time and rotation angle.

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Section: Discussionmentioning

confidence: 99%

“…z (t f ) components and the following relations hold for the final values of the trajectories, see Eq. (30),…”

Section: Construction Of Further Invariantsmentioning

confidence: 99%

Inverse engineering of fast state transfer among coupled oscillators

Lu,

Lizuain,

Muga

2022

Preprint

View full text Add to dashboard Cite

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“…In recent years, the analogous cavity magnomechanical system has received considerable attention [20,21]. It has been shown that cavity magnomechanics (CMM) has the potential to prepare macroscopic quantum states [22][23][24][25][26][27][28][29][30][31] and nonclassical states of microwave fields [32,33], and it has also promising applications in quantum information processing and quantum technologies [34][35][36][37][38][39][40][41][42][43]. In the CMM, a magnon mode (spin wave) couples to a deformation vibration mode of a ferromagnet (or ferrimagnet) via the magnetostrictive force, and to a microwave cavity mode via the magnetic dipole interaction.…”

Section: Introductionmentioning

confidence: 99%

Magnon squeezing enhanced ground-state cooling in cavity magnomechanics

Asjad¹,

Li²,

Zhu³

et al. 2022

Preprint

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Cavity magnomechanics has recently become a new platform for studying macroscopic quantum phenomena. The magnetostriction induced vibration mode of a large-size ferromagnet or ferrimagnet reaching its ground state represents a genuine macroscopic quantum state. Here we study the ground-state cooling of the mechanical vibration mode in a cavity magnomechanical system, and focus on the role of magnon squeezing in improving the cooling efficiency. We find that the magnon squeezing can significantly and even completely suppress the magnomechanical Stokes scattering. It thus becomes particularly useful in realizing ground-state cooling in the unresolved-sideband regime, where the conventional sideband cooling protocols become inefficient. We also find that the coupling to the microwave cavity plays only an adverse effect in mechanical cooling. This makes essentially the two-mode magnomechanical system (without involving the microwave cavity) a preferred system for cooling the mechanical motion, in which the magnon mode is established by a uniform bias magnetic field and a microwave drive field.

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Accelerated adiabatic passage in cavity magnomechanics

Cited by 2 publications

References 55 publications

Inverse engineering of fast state transfer among coupled oscillators

Inverse engineering of fast state transfer among coupled oscillators

Magnon squeezing enhanced ground-state cooling in cavity magnomechanics

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