Feedback stabilization of the resonant frequency in tunable microwave cavities with single-photon occupancy

• URL: http://arxiv.org/abs/2202.04227v3
• Date: Wed, 1 Jun 2022 12:22:49 GMT
• Title: Feedback stabilization of the resonant frequency in tunable microwave cavities with single-photon occupancy
• Authors: S. Kanhirathingal, B. Thyagarajan, B. L. Brock, Juliang Li, E. Jeffrey, M. P. Blencowe, J. Y. Mutus, A. J. Rimberg
• Abstract summary: We demonstrate low-frequency noise suppression in the resonant frequency fluctuations of a cavity-embedded Cooper pair transistor driven at single-photon occupancy. Gate-dependent tunability of the cCPT allows us to implement a feedback-scheme, derived from the Pound-Drever-Hall locking technique.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We successfully demonstrate low-frequency noise suppression in the resonant frequency fluctuations of a cavity-embedded Cooper pair transistor (cCPT) driven at single-photon occupancy. In particular, we report a reduction in the resonant frequency fluctuations caused by the internal charge noise over a bandwidth of $\sim$1.4 kHz when the cavity is driven at an average photon number $n=10$, and a bandwidth of 11 Hz for average $n=1$. The gate-dependent tunability of the cCPT allows us to implement a feedback-scheme, derived from the Pound-Drever-Hall locking technique. This reduces fluctuations due to intrinsic charge-noise, which otherwise interferes with the cCPT's operation as a near quantum-limited electrometer. We believe our technique can be generalized to achieve frequency stabilization in tunable microwave resonators that play a vital role in today's quantum computing architecture, thereby moderating the limitations in detection caused by the intrinsic $1/f$-noise on such circuit devices. The work discusses the various aspects relating to the operation of a fully functional feedback loop down to the single-photon level.

Related papers

• Quantum-circuit refrigeration of a superconducting microwave resonator well below a single quantum [0.0]
  We experimentally demonstrate a proposed single-junction quantum-circuit refrigerator (QCR) for a superconducting 4.7-GHz resonator. We demonstrate coherent and thermal resonator states and that the on-demand dissipation provided by the QCR can drive these to a small fraction of a photon on average. This work introduces a versatile tool to study open quantum systems, quantum thermodynamics, and to quickly reset superconducting qubits.
  arXiv  Detail & Related papers  (2023-08-01T09:20:07Z)
• Multi-Tone Microwave Locking via Real-Time Feedback [0.0]
  Low-frequency noise coupling to mechanical experiments often introduces low-frequency fluctuations to the resonators. We demonstrate a dynamic feedback system implemented by the locking of a microwave drive to the noisy cavity. As low-frequency cavity frequency noise can be a limiting factor in many experiments, the multi-tone microwave locking technique presented here is expected to be relevant for a wide range of fields of research.
  arXiv  Detail & Related papers  (2023-04-13T07:05:32Z)
• Fast high-fidelity charge readout by operating the cavity-embedded Cooper pair transistor in the Kerr bistable regime [55.41644538483948]
  We demonstrate single-shot resolution between two charge states that are $0.09e$ apart. The measurement is performed with 94$%$ fidelity in a duration of 3 $mu$s.
  arXiv  Detail & Related papers  (2022-12-31T03:44:10Z)
• Resolving Fock states near the Kerr-free point of a superconducting resonator [51.03394077656548]
  We have designed a tunable nonlinear resonator terminated by a SNAIL (Superconducting Asymmetric Inductive eLement) We have excited photons near this Kerr-free point and characterized the device using a transmon qubit.
  arXiv  Detail & Related papers  (2022-10-18T09:55:58Z)
• Stabilizing and improving qubit coherence by engineering noise spectrum of two-level systems [52.77024349608834]
  Superconducting circuits are a leading platform for quantum computing. Charge fluctuators inside amorphous oxide layers contribute to both low-frequency $1/f$ charge noise and high-frequency dielectric loss. We propose to mitigate those harmful effects by engineering the relevant TLS noise spectral densities.
  arXiv  Detail & Related papers  (2022-06-21T18:37:38Z)
• Large Single-Phonon Optomechanical Coupling between Quantum Dots and Tightly Confined Surface Acoustic Waves in the Quantum Regime [1.7039969990048311]
  Small acoustic cavities with large zero-point motion are required for high efficiencies. We experimentally establish the feasibility of this platform through electro- and opto-mechanical characterization. We show conversion between microwave phonons and optical photons with sub-natural linewidths.
  arXiv  Detail & Related papers  (2022-05-03T02:53:01Z)
• Time-correlated Photons from a In$_{0.5}$Ga$_{0.5}$P Photonic Crystal Cavity on a Silicon Chip [55.41644538483948]
  Time-correlated photon pairs are generated by triply-resonant Four-Wave-Mixing in a In$_0.5$Ga$_0.5$P Photonic Crystal cavitiy. The generation rate reaches 5 MHz in cavities with Q-factor $approx 4times 104$, more than one order of magnitude larger than what is measured using ring resonators with similar Q factors fabricated on the same chip.
  arXiv  Detail & Related papers  (2022-02-19T15:22:06Z)
• Frequency fluctuations of ferromagnetic resonances at milliKelvin temperatures [50.591267188664666]
  Noise is detrimental to device performance, especially for quantum coherent circuits. Recent efforts have demonstrated routes to utilizing magnon systems for quantum technologies, which are based on single magnons to superconducting qubits. Researching the temporal behavior can help to identify the underlying noise sources.
  arXiv  Detail & Related papers  (2021-07-14T08:00:37Z)
• A silicon singlet-triplet qubit driven by spin-valley coupling [0.0]
  We demonstrate a novel singlet-triplet qubit operating mode that can drive qubit evolution at frequencies in excess of 200 MHz. This approach offers a means to electrically turn on and off fast control, while providing high logic gateity and long qubit dephasing times.
  arXiv  Detail & Related papers  (2021-02-24T05:00:07Z)
• Robust photon-mediated entangling gates between quantum dot spin qubits [0.0]
  We present a novel photon-mediated cross-resonance gate that is consistent with realistic experimental capabilities. We propose gate sequences capable of suppressing errors due to quasistatic noise for both the cross-resonance and iSWAP gates.
  arXiv  Detail & Related papers  (2021-01-27T18:09:22Z)
• Frequency-Domain Quantum Interference with Correlated Photons from an Integrated Microresonator [96.25398432840109]
  We report frequency-domain Hong-Ou-Mandel interference with spectrally distinct photons generated from a chip-based microresonator. Our work establishes four-wave mixing as a tool for selective high-fidelity two-photon operations in the frequency domain.
  arXiv  Detail & Related papers  (2020-03-14T01:48:39Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.