Charge sensitivity of a cavity-embedded Cooper pair transistor limited by single-photon shot noise

• URL: http://arxiv.org/abs/2012.12313v3
• Date: Thu, 1 Jul 2021 01:18:43 GMT
• Title: Charge sensitivity of a cavity-embedded Cooper pair transistor limited by single-photon shot noise
• Authors: S. Kanhirathingal, B. L. Brock, A. J. Rimberg, M. P. Blencowe
• Abstract summary: We analyze the quantum dynamics of an ultrasensitive electrometer embedded in a quarter-wave microwave cavity. We predict the fundamental, photon shot noise-limited charge sensitivity to be $0.12, mumathrme/sqrtmathrmHz$ when the pumped cavity has an average of one photon. This is to be compared with a first reported charge sensitivity value $14, mumathrme/sqrtmathrmHz$ in the single-photon regime.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Using an operator scattering approach, we analyze the quantum dynamics of an ultrasensitive electrometer -- a Cooper pair transistor embedded in a quarter-wave microwave cavity (cCPT). While the cCPT is inherently a tunable, strongly nonlinear system affording a diverse range of functionalities, we restrict our present analysis to a necessary first investigation of its linear charge sensing capabilities, limiting to low pump powers corresponding to an average cavity photon number $\lesssim 1$. Assuming realizable cCPT parameters (B. L. Brock et al., Phys. Rev. Applied, 044009), and not including noise from the subsequent amplifier chain, we predict the fundamental, photon shot noise-limited charge sensitivity to be $0.12\, \mu{\mathrm{e}}/\sqrt{\mathrm{Hz}}$ when the pumped cavity has an average of one photon and the cCPT is operated close to charge degeneracy. This is to be compared with a first reported charge sensitivity value $14\, \mu{\mathrm{e}}/\sqrt{\mathrm{Hz}}$ in the single-photon regime (B. L. Brock et al., arXiv:2102.05362).

Related papers

• Microwave single-photon detection using a hybrid spin-optomechanical quantum interface [0.0]
  We propose a hybrid spin-optomechanical interface to detect single microwave photons. The microwave photons are coupled to a phononic resonator via piezoelectric actuation.
  arXiv  Detail & Related papers  (2024-01-19T02:00:38Z)
• 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)
• Integrated Quantum Optical Phase Sensor [48.7576911714538]
  We present a photonic integrated circuit fabricated in thin-film lithium niobate. We use the second-order nonlinearity to produce a squeezed state at the same frequency as the pump light and realize circuit control and sensing with electro-optics. We anticipate that on-chip photonic systems like this, which operate with low power and integrate all of the needed functionality on a single die, will open new opportunities for quantum optical sensing.
  arXiv  Detail & Related papers  (2022-12-19T18:46:33Z)
• Ultrabright and narrowband intra-fiber biphoton source at ultralow pump power [51.961447341691]
  Nonclassical photon sources of high brightness are key components of quantum communication technologies. We here demonstrate the generation of narrowband, nonclassical photon pairs by employing spontaneous four-wave mixing in an optically-dense ensemble of cold atoms within a hollow-core fiber.
  arXiv  Detail & Related papers  (2022-08-10T09:04:15Z)
• Quantum density matrix theory for a laser without adiabatic elimination of the population inversion: transition to lasing in the class-B limit [62.997667081978825]
  No class-B quantum density-matrix model is available to date, capable of accurately describing coherence and photon correlations within a unified theory. Here we carry out a density-matrix theoretical approach for generic class-B lasers, and provide closed equations for the photonic and atomic reduced density matrix in the Fock basis of photons. This model enables the study of few-photon bifurcations and non-classical photon correlations in class-B laser devices, also leveraging quantum descriptions of coherently coupled nanolaser arrays.
  arXiv  Detail & Related papers  (2022-05-26T16:33:51Z)
• 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)
• Feedback stabilization of the resonant frequency in tunable microwave cavities with single-photon occupancy [0.0]
  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.
  arXiv  Detail & Related papers  (2022-02-09T01:58:54Z)
• Emission of photon multiplets by a dc-biased superconducting circuit [0.0]
  We observe the emission of bunches of $k geqslant 1$ photons by a circuit made of a microwave resonator in series with a voltage-biased tunable Josephson junction. The bunches are emitted at specific values $V_k$ of the bias voltage, for which each Cooper pair tunneling across the junction creates exactly k photons in the resonator.
  arXiv  Detail & Related papers  (2021-11-18T10:12:59Z)
• Fast and Ultrasensitive Electrometer Operating at the Single-Photon Level [0.0]
  We demonstrate fast and ultrasensitive charge detection with a cavity-embedded Cooper pair transistor (cCPT) We report a minimum charge sensitivity of $14$ $mu e/sqrtmathrmHz$ with a detection bandwidth on the order of $1$ MHz using $16$ attowatts of power, corresponding to the single-photon level of the cavity. Our results support the feasibility of using the cCPT to mediate an optomechanical interaction that reaches the single-photon strong coupling regime.
  arXiv  Detail & Related papers  (2021-02-10T10:02:38Z)
• Cooperatively-enhanced precision of hybrid light-matter sensors [0.0]
  We consider a hybrid system of matter and light as a sensing device and quantify the role of cooperative effects. As an application, we show that a Bose-Einstein condensate trapped in a double-well potential within an optical cavity can detect the gravitational acceleration.
  arXiv  Detail & Related papers  (2020-07-27T15:55:58Z)
• Near-degenerate quadrature-squeezed vacuum generation on a silicon-nitride chip [54.87128096861778]
  In this Letter, we demonstrate the generation of quadrature-phase squeezed states in the radio-frequency carrier sideband using a small-footprint silicon-nitride microresonator with a dual-pumped four-wave-mixing process. It is critical to account for the nonlinear behavior of the pump fields to properly predict the squeezing that can be generated in this system.
  arXiv  Detail & Related papers  (2020-02-04T01:41:41Z)

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.