Optomechanical Platform with a Three-dimensional Waveguide Cavity

Gunupudi, Bindu; Das, Soumya; Navarathna, Rohit; Sahu, Sudhir Kumar; Majumder, Sourav; Singh, Vibhor

doi:10.1103/physrevapplied.11.024067

Cited by 6 publications

(8 citation statements)

References 35 publications

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“…In this Letter, we introduce a new optomechanical architecture that mitigates the nonideality of previous designs, allowing us to reach ultrastrong coupling and approach the fundamental stability limit of the pure optomechanical interaction [14]. Our device consists of a microfabricated vacuum-gap capacitor embedded in a three-dimensional superconducting microwave cavity, analogous to recent work in the field of circuit quantum electrodynamics [15] and similar to other optomechanical demonstrations [9,[16][17][18]. Our device takes advantage of the superior power handling of bulk cavity resonators compared to thin-film inductors.…”

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confidence: 94%

Ultrastrong Parametric Coupling between a Superconducting Cavity and a Mechanical Resonator

et al. 2019

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We present a new optomechanical device where the motion of a micromechanical membrane couples to a microwave resonance of a three-dimensional superconducting cavity. With this architecture, we realize ultrastrong parametric coupling, where the coupling rate not only exceeds the dissipation rates in the system but also rivals the mechanical frequency itself. In this regime, the optomechanical interaction induces a frequency splitting between the hybridized normal modes that reaches 88% of the bare mechanical frequency, limited by the fundamental parametric instability. The coupling also exceeds the mechanical thermal decoherence rate, enabling new applications in ultrafast quantum state transfer and entanglement generation.

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confidence: 94%

Ultrastrong Parametric Coupling between a Superconducting Cavity and a Mechanical Resonator

et al. 2019

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“…For instance, in plasmonics, photons are allowed to travel through multiple transition pathways which interfere, thus making the occurrence of Fano line shapes quite common in such materials. Fano resonances have been observed in a wide variety of systems which include the phonon interactions in solids [3,4], electron transport in quantum wells, quantum dots [5,6], 3D waveguides [7], coupled photonic microcavities [8,9], plasmonic metamaterials [10,11] and nanostructures [12][13][14][15] and photonic materials [16][17][18][19][20].…”

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confidence: 99%

Coherent control of Fano resonances in a macroscopic four-mirror cavity

et al. 2020

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We demonstrate coherent control of optomechanically induced transparency and Fano resonances in a four mirror macroscopic optomechanical cavity, with two movable mirrors, each driven by an external mechanical pump. The variable control of the amplitude and phase of the coherent mechanical pumps provides a means of tuning the shape and nature of the Fano profiles. Further, our scheme shows the occurrence of tunable optomechanical features, even at very low mechanical driving field amplitudes, in macroscopic optomechanical cavities.

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“…We characterize the fast-flux line and find a bandwidth of ≈ 100 MHz. These performance benchmarking results provide the design guidelines for hybrid systems intended to integrate additional degrees of freedom with the circuit-QED platform [31,32].…”

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confidence: 99%

“…With these challenges in mind, investigating the performance of a transmon qubit in 3D architecture with a fast-flux line could still have practical importance [29][30][31][32][33][34]. For example, consider a low-frequency mechanical oscillator coupled to a microwave cavity.…”

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confidence: 99%

A Fast Tunable 3D-Transmon Architecture for Superconducting Qubit-Based Hybrid Devices

et al. 2022

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Superconducting qubits utilize the strong non-linearity of Josephson junctions. Control over the Josephson nonlinearity, either by a current bias or by the magnetic flux, can be a valuable resource that brings tunability in the hybrid system consisting of superconducting qubits. To enable such a control, here we incorporate a fast-flux line for a frequency tunable transmon qubit in 3D cavity architecture. We investigate the flux-dependent dynamic range, relaxation from unconfined states, and the bandwidth of the flux-line. Using time-domain measurements, we probe the transmon's relaxation from higher energy levels after populating the cavity with ≈ 2.1 × 10 4 photons. For the device used in the experiment, we find a resurgence time corresponding to the recovery of coherence to be 4.8 μs . We use a fast-flux line to tune the qubit frequency and demonstrate the swap of a single excitation between cavity and qubit mode. By measuring the deviation in the transferred population from the theoretical prediction, we estimate the bandwidth of the flux line to be ≈ 100 MHz, limited by the parasitic effect in the design. These results suggest that the approach taken here to implement a fast-flux line in a 3D cavity could be helpful for the hybrid devices based on the superconducting qubit.

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Optomechanical Platform with a Three-dimensional Waveguide Cavity

Cited by 6 publications

References 35 publications

Ultrastrong Parametric Coupling between a Superconducting Cavity and a Mechanical Resonator

Ultrastrong Parametric Coupling between a Superconducting Cavity and a Mechanical Resonator

Coherent control of Fano resonances in a macroscopic four-mirror cavity

A Fast Tunable 3D-Transmon Architecture for Superconducting Qubit-Based Hybrid Devices

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