Spectrum analysis with parametrically modulated transmon qubits
- URL: http://arxiv.org/abs/2503.05258v1
- Date: Fri, 07 Mar 2025 09:16:20 GMT
- Title: Spectrum analysis with parametrically modulated transmon qubits
- Authors: Nir Gavrielov, Santiago Oviedo-Casado, Alex Retzker,
- Abstract summary: We introduce parametric spectroscopy, a method that merges parametric modulation of a qubit's energy gap with dynamical decoupling sequences.<n>Our theoretical study shows that parametric spectroscopy enables access to the difficult high-frequency domain of the flux spectrum in transmons.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Exploring the noise spectrum impacting a qubit and extending its coherence duration are fundamental components of quantum technologies. In this study, we introduce parametric spectroscopy, a method that merges parametric modulation of a qubit's energy gap with dynamical decoupling sequences. The parametric modulation provides high sensitivity to extensive regions of the noise spectrum, while dynamical decoupling reduces the effect of driving noise. Our theoretical study shows that parametric spectroscopy enables access to the difficult high-frequency domain of the flux spectrum in transmons.
Related papers
- High-resolution broadband characterization of resonance dispersion in an optical microresonator [0.03092220911766672]
We present a simple and highly precise method for the free spectral range over a 5 THz bandwidth in silicon nitride microresonators.<n>Our fully fibered plug-and-play experimental setup enables the accurate extraction of resonance frequencies.
arXiv Detail & Related papers (2025-12-10T09:51:19Z) - From noisy observables to accurate ground state energies: a quantum classical signal subspace approach with denoising [0.7499722271664144]
We propose a hybrid quantum-classical algorithm for ground state energy estimation.<n>We show that FDODMD achieves convergence in high-noise regimes inaccessible to baseline methods under a limited quantum computational budget.<n>This performance gain is entirely classical, requiring no additional quantum overhead and significantly reducing overall quantum resource demands.
arXiv Detail & Related papers (2025-05-15T22:37:44Z) - Wideband covariance magnetometry below the diffraction limit [33.83310724797305]
We experimentally demonstrate a method for measuring correlations of wideband magnetic signals with spatial resolution below the optical diffraction limit.
Our technique employs two nitrogen-vacancy (NV) centers in diamond as nanoscale magnetometers.
arXiv Detail & Related papers (2025-05-01T03:01:48Z) - Nonlinear dynamical Casimir effect and Unruh entanglement in waveguide QED with parametrically modulated coupling [83.88591755871734]
We study theoretically an array of two-level qubits moving relative to a one-dimensional waveguide.
When the frequency of this motion approaches twice the qubit resonance frequency, it induces parametric generation of photons and excitation of the qubits.
We develop a comprehensive general theoretical framework that incorporates both perturbative diagrammatic techniques and a rigorous master-equation approach.
arXiv Detail & Related papers (2024-08-30T15:54:33Z) - Random Pulse Sequences for Qubit Noise Spectroscopy [0.7782749017947664]
Qubit noise spectroscopy is an important tool for the experimental investigation of open quantum systems.
Here we describe an alternative method for quickly characterizing the spectral density.
Our simulations of the performance of the random pulse sequences on a realistic physical system, self-assembled quantum dots, reveal a speedup of an order of magnitude in extracting the noise spectrum.
arXiv Detail & Related papers (2023-03-02T02:01:30Z) - Resonant Parametric Photon Generation in Waveguide-coupled Quantum Emitter Arrays [83.88591755871734]
We have developed a theory of parametric photon generation in the waveguides coupled to arrays of quantum emitters with temporally modulated resonance frequencies.
Such generation can be interpreted as a dynamical Casimir effect.
We demonstrate numerically and analytically how the emission directionality and photon-photon correlations can be controlled by the phases of the modulation.
arXiv Detail & Related papers (2023-02-24T18:07:49Z) - Digital noise spectroscopy with a quantum sensor [57.53000001488777]
We introduce and experimentally demonstrate a quantum sensing protocol to sample and reconstruct the auto-correlation of a noise process.
Walsh noise spectroscopy method exploits simple sequences of spin-flip pulses to generate a complete basis of digital filters.
We experimentally reconstruct the auto-correlation function of the effective magnetic field produced by the nuclear-spin bath on the electronic spin of a single nitrogen-vacancy center in diamond.
arXiv Detail & Related papers (2022-12-19T02:19:35Z) - Fourier Transform Noise Spectroscopy [5.508069835694671]
We introduce a noise spectroscopy method that utilizes only the Fourier transform of free induction decay or spin echo measurements.
Our method is applicable to a wide range of quantum platforms and provides a simpler path toward a more accurate spectral characterization of quantum devices.
arXiv Detail & Related papers (2022-10-01T22:20:10Z) - Quantum-enhanced absorption spectroscopy with bright squeezed frequency
combs [91.3755431537592]
We propose a strategy combining the advantages of frequency modulation spectroscopy with the reduced noise properties accessible by squeezing the probe state.
A homodyne detection scheme allows the simultaneous measurement of the absorption at multiple frequencies.
We predict a significant enhancement of the signal-to-noise ratio that scales exponentially with the squeezing factor.
arXiv Detail & Related papers (2022-09-30T17:57:05Z) - Non-Markovian transient spectroscopy in cavity QED [0.0]
Transient spectroscopy can be used to recover spectral features that may be obscured in the stationary cavity transmission spectrum due to inhomogeneous broadening.
The formalism introduced here can be leveraged to perform in situ noise spectroscopy, revealing a robust signature of quantum noise arising from non-commuting observables.
arXiv Detail & Related papers (2022-06-04T23:40:57Z) - Frequency combs with parity-protected cross-correlations from
dynamically modulated qubit arrays [117.44028458220427]
We develop a general theoretical framework to dynamically engineer quantum correlations in the frequency-comb emission from an array of superconducting qubits in a waveguide.
We demonstrate, that when the resonance of the two qubits are periodically modulated with a $pi$ phase shift, it is possible to realize simultaneous bunching and antibunching in cross-correlations of the scattered photons from different sidebands.
arXiv Detail & Related papers (2022-03-01T13:12:45Z) - Superradiance in dynamically modulated Tavis-Cumming model with spectral
disorder [62.997667081978825]
Superradiance is the enhanced emission of photons from quantum emitters collectively coupling to the same optical mode.
We study the interplay between superradiance and spectral disorder in a dynamically modulated Tavis-Cummings model.
arXiv Detail & Related papers (2021-08-18T21:29:32Z) - 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) - Quantum oscillator noise spectroscopy via displaced cat states [2.336697823214672]
We reconstruct the noise spectrum using a series of different drive phase and amplitude modulation patterns.
We apply the technique to the identification of intrinsic noise in the motional frequency of a single trapped ion.
arXiv Detail & Related papers (2020-10-09T05:27:52Z)
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.