Single-photon transfer using levitated cavityless optomechanics

Kumar, Pardeep; Bhattacharya, M.

doi:10.1103/physreva.99.023811

Cited by 4 publications

(2 citation statements)

References 61 publications

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“…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%

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: Introductionmentioning

confidence: 99%

Accelerated adiabatic passage in cavity magnomechanics

Qi,

Jing

2022

Preprint

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“…Photons are the usual candidate for the flying qubits, whereas some other quantum system with a longer coherence time is necessary for the storage of quantum information in quantum repeaters and networks [25]. The storage of quantum states has, for example, been previously studied in atomic media, where the information is stored as spin excitations [26,27,28], in optomechanical systems [29,30,31], in coupled optical waveguides, or in acoustic excitations [32,33,34,35].…”

Section: Introductionmentioning

confidence: 99%

Cavity magnomechanical storage and retrieval of quantum states

2021

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We show how a quantum state in a microwave cavity mode can be transferred to and stored in a phononic mode via an intermediate magnon mode in a magnomechanical system. For this we consider a ferrimagnetic yttrium iron garnet (YIG) sphere inserted in a microwave cavity, where the microwave and magnon modes are coupled via a magnetic-dipole interaction and the magnon and phonon modes in the YIG sphere are coupled via magnetostrictive forces. By modulating the cavity and magnon detunings and the driving of the magnon mode in time, a Stimulated Raman Adiabatic Passage (STIRAP)-like coherent transfer becomes possible between the cavity mode and the phonon mode. The phononic mode can be used to store the photonic quantum state for long periods as it possesses lower damping than the photonic and magnon modes. Thus our proposed scheme offers a possibility of using magnomechanical systems as quantum memory for photonic quantum information.

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Ultrafast valley polarization in bilayer graphene

Kumar

Herath

Apalkov

2021

Journal of Applied Physics

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We study theoretically the interaction of a bilayer graphene with a circularly polarized ultrafast optical pulse of a single oscillation at an oblique incidence. The normal component of the pulse breaks the inversion symmetry of the system and opens up a dynamical bandgap due to which a valley-selective population of the conduction band becomes sensitive to the angle of incident of the pulse. We show that the magnitude of the valley polarization can be controlled by the angle of incidence, the amplitude, and the angle of in-plane polarization of the chiral optical pulse. Subsequently, a sequence of a circularly polarized pulse followed by a linearly polarized femtosecond-long pulse can be used to control and probe the valley polarization created by the preceding pulse. Our protocol provides a favorable platform to design ultrafast all-optical valleytronic information processing.

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Single-photon transfer using levitated cavityless optomechanics

Cited by 4 publications

References 61 publications

Accelerated adiabatic passage in cavity magnomechanics

Accelerated adiabatic passage in cavity magnomechanics

Cavity magnomechanical storage and retrieval of quantum states

Ultrafast valley polarization in bilayer graphene

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