Entanglement creation in a quantum-dot–nanocavity system by Fourier-synthesized acoustic pulses

Blattmann, Ralf; Krenner, Hubert J.; Kohler, Sigmund; Hänggi, Peter

doi:10.1103/physreva.89.012327

Cited by 37 publications

(46 citation statements)

References 42 publications

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“…Further optimization of the slanted IDT design can be done to improve its passband width, shape factor and stopband suppression, so the device may be applied as an efficient broadband filter in radio-frequency photonics systems. Broadband IDT using Fourier-synthesized design can also be used to generate sharp SAW pulses in a scheme, which recently has been proposed as an ultrafast way to modulate quantum dots in photonic nanocavities for quantum photonics 37 .…”

Section: Resultsmentioning

confidence: 99%

Sub-optical wavelength acoustic wave modulation of integrated photonic resonators at microwave frequencies

Tadesse¹,

Li²

2014

Nat Commun

160

103

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Light-sound interactions have long been exploited in various acousto-optic devices based on bulk crystalline materials. Conventionally, these devices operate in megahertz frequency range where the acoustic wavelength is much longer than the optical wavelength and a long interaction length is required to attain significant coupling. With nanoscale transducers, acoustic waves with sub-optical wavelengths can now be excited to induce strong acoustooptic coupling in nanophotonic devices. Here we demonstrate microwave frequency surface acoustic wave transducers co-integrated with nanophotonic resonators on piezoelectric aluminum nitride substrates. Acousto-optic modulation of the resonance modes at above 10 GHz with the acoustic wavelength significantly below the optical wavelength is achieved. The phase and modal matching conditions in this scheme are investigated for efficient modulation. The new acousto-optic platform can lead to novel optical devices based on nonlinear Brillouin processes and provides a direct, wideband link between optical and microwave photons for microwave photonics and quantum optomechanics.

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Section: Resultsmentioning

confidence: 99%

Sub-optical wavelength acoustic wave modulation of integrated photonic resonators at microwave frequencies

Tadesse¹,

Li²

2014

Nat Commun

160

103

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“…One determines from g(f,-, r j = 0 all zeros f,(rf ) and inserts them into Eq. (33), which yields relations of the type TA \ r f ).…”

Section: (27) T Jomentioning

confidence: 98%

Qubit interference at avoided crossings: The role of driving shape and bath coupling

2015

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We derive the structure of Landau-Zener-Stikkelberg-Majorana (LZSM) interference patterns for a qubit that experiences quantum dissipation and is additionally subjected to time-periodic but otherwise general driving. A spin-boson Hamiltonian serves as the model, which we treat with a Bloch-Redfield master equation in the Floquet basis. It predicts resonance peaks whose form depends significantly on the operator through which the qubit couples to the bath. The Fourier transforms of the LZSM patterns exhibit arc structures which reflect the shape of the driving. These features are captured by an effective time-independent Bloch equation which provides an analytical solution. Moreover, we determine the decay of these arcs as a function of dissipation strength and temperature.

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“…5 Coherent acoustic phonons can also be used to sweep the frequency of optical cavities across the resonance frequencies of QDs. 6 The generation of coherent phonons [7][8][9][10][11] and phonons in non-classical states such as squeezed phonons has been of considerable interest. [12][13][14][15] An optically driven QD has been proposed for the realization of a phonon laser when placed in an acoustic cavity 16 or it could act as a heat pump when driven non-resonantly.…”

Section: Introductionmentioning

confidence: 99%

Energy transport and coherence properties of acoustic phonons generated by optical excitation of a quantum dot

Wigger

Lüker

Reiter

et al. 2014

J. Phys.: Condens. Matter

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The energy transport of acoustic phonons generated by the optical excitation of a quantum dot as well as the coherence properties of these phonons are studied theoretically both for the case of a pulsed excitation and for a continuous wave (cw) excitation switched on instantaneously. For a pulsed excitation, depending on pulse area and pulse duration, a finite number of phonon wave packets is emitted, while for the case of a cw excitation a sequence of wave packets with decreasing amplitude is generated after the excitation has been switched on. We show that the energy flow associated with the generated phonons is partly related to coherent phonon oscillations and partly to incoherent phonon emission. The efficiency of the energy transfer to the phonons and the details of the energy flow depend strongly and in a non-monotonic way on the Rabi frequency exhibiting a resonance behavior. However, in the case of cw excitation it turns out that the total energy transferred to the phonons is directly linked in a monotonic way to the Rabi frequency.

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Entanglement creation in a quantum-dot–nanocavity system by Fourier-synthesized acoustic pulses

Cited by 37 publications

References 42 publications

Sub-optical wavelength acoustic wave modulation of integrated photonic resonators at microwave frequencies

Sub-optical wavelength acoustic wave modulation of integrated photonic resonators at microwave frequencies

Qubit interference at avoided crossings: The role of driving shape and bath coupling

Energy transport and coherence properties of acoustic phonons generated by optical excitation of a quantum dot

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