Quantum efficiency, purity and stability of a tunable, narrowband microwave single-photon source

• URL: http://arxiv.org/abs/2105.11234v1
• Date: Mon, 24 May 2021 12:19:39 GMT
• Title: Quantum efficiency, purity and stability of a tunable, narrowband microwave single-photon source
• Authors: Yong Lu, Andreas Bengtsson, Jonathan J.Burnett, Baladitya Suri, Sankar Raman Sathyamoorthy, Hampus Renberg Nilsson, Marco Scigliuzzo, Jonas Bylander, G\"oran Johansson, Per Delsing
• Abstract summary: We demonstrate an on-demand source of microwave single photons with 71--99% intrinsic quantum efficiency. The source is narrowband (300unitekHz) and tuneable over a 600 MHz range around 5.2 GHz.
• Score: 0.2949225575200669
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We demonstrate an on-demand source of microwave single photons with 71--99\% intrinsic quantum efficiency. The source is narrowband (300\unite{kHz}) and tuneable over a 600 MHz range around 5.2 GHz. Such a device is an important element in numerous quantum technologies and applications. The device consists of a superconducting transmon qubit coupled to the open end of a transmission line. A $\pi$-pulse excites the qubit, which subsequently rapidly emits a single photon into the transmission line. A cancellation pulse then suppresses the reflected $\pi$-pulse by 33.5 dB, resulting in 0.005 photons leaking into the photon emission channel. We verify strong antibunching of the emitted photon field and determine its Wigner function. Non-radiative decay and $1/f$ flux noise both affect the quantum efficiency. We also study the device stability over time and identify uncorrelated discrete jumps of the pure dephasing rate at different qubit frequencies on a time scale of hours, which we attribute to independent two-level system defects in the device dielectrics, dispersively coupled to the qubit.

Related papers

• Indistinguishable telecom band photons from a single erbium ion in the solid state [0.0]
  We implant Er$3+$ into CaWO$_4$, a material that combines a non-polar site symmetry, low decoherence from nuclear spins, and is free of background rare earth ions. We observe single-scan optical linewidths of 150 kHz and long-term spectral diffusion of 63 kHz, both close to the Purcell-enhanced radiative linewidth of 21 kHz. This represents a significant step towards the construction of telecom-band quantum repeater networks with single Er$3+$ ions.
  arXiv  Detail & Related papers  (2023-01-09T18:29:53Z)
• 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)
• On-chip quantum information processing with distinguishable photons [55.41644538483948]
  Multi-photon interference is at the heart of photonic quantum technologies. Here, we experimentally demonstrate that detection can be implemented with a temporal resolution sufficient to interfere photons detuned on the scales necessary for cavity-based integrated photon sources. We show how time-resolved detection of non-ideal photons can be used to improve the fidelity of an entangling operation and to mitigate the reduction of computational complexity in boson sampling experiments.
  arXiv  Detail & Related papers  (2022-10-14T18:16:49Z)
• Quantum-limited millimeter wave to optical transduction [50.663540427505616]
  Long distance transmission of quantum information is a central ingredient of distributed quantum information processors. Current approaches to transduction employ solid state links between electrical and optical domains. We demonstrate quantum-limited transduction of millimeter-wave (mmwave) photons into optical photons using cold $85$Rb atoms as the transducer.
  arXiv  Detail & Related papers  (2022-07-20T18:04:26Z)
• Slowing down light in a qubit metamaterial [98.00295925462214]
  superconducting circuits in the microwave domain still lack such devices. We demonstrate slowing down electromagnetic waves in a superconducting metamaterial composed of eight qubits coupled to a common waveguide. Our findings demonstrate high flexibility of superconducting circuits to realize custom band structures.
  arXiv  Detail & Related papers  (2022-02-14T20:55:10Z)
• Spectral multiplexing of telecom emitters with stable transition frequency [68.8204255655161]
  coherent emitters can be entangled over large distances using photonic channels. We observe around 100 individual erbium emitters using a Fabry-Perot resonator with an embedded 19 micrometer thin crystalline membrane. Our results constitute an important step towards frequency-multiplexed quantum-network nodes operating directly at a telecommunication wavelength.
  arXiv  Detail & Related papers  (2021-10-18T15:39:07Z)
• Quantum interference between independent solid-state single-photon sources separated by 300 km fiber [9.597915082806276]
  We report quantum interference between two single photons from independent QDs separated by 302 km optical fiber. Our work represents a key step to long-distance solid-state quantum networks.
  arXiv  Detail & Related papers  (2021-06-29T16:27:28Z)
• Phonon dephasing and spectral diffusion of quantum emitters in hexagonal Boron Nitride [52.915502553459724]
  Quantum emitters in hexagonal boron nitride (hBN) are emerging as bright and robust sources of single photons for applications in quantum optics. We study phonon dephasing and spectral diffusion of quantum emitters in hBN via resonant excitation spectroscopy at cryogenic temperatures.
  arXiv  Detail & Related papers  (2021-05-25T05:56:18Z)
• Electron shelving of a superconducting artificial atom [0.0]
  We demonstrate a conditional fluorescence readout of fluxonium qubit placed inside a matched one-dimensional waveguide. Cycling the non-computational transition between ground and third excited states produces a microwave photon every 91 ns conditioned on the qubit ground state. The readout has a built-in quantum non-demolition property, allowing over 100 fluorescence cycles in agreement with a four-level optical pumping model.
  arXiv  Detail & Related papers  (2020-08-06T01:50:09Z)
• A bright and fast source of coherent single photons [46.25143811066789]
  A single photon source is a key enabling technology in device-independent quantum communication. We report a single photon source with an especially high system efficiency.
  arXiv  Detail & Related papers  (2020-07-24T17:08:46Z)
• Cavity quantum electro-optics: Microwave-telecom conversion in the quantum ground state [0.0]
  We present a cavity electro-optic transceiver operating in a millikelvin environment with a mode occupancy as low as 0.025 $pm$ 0.005 noise photons. The device is versatile and compatible with superconducting qubits, which might open the way for fast and deterministic entanglement distribution between microwave and optical fields.
  arXiv  Detail & Related papers  (2020-05-26T14:35:27Z)

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.