Ramsey Interferometry with Qudits

• URL: http://arxiv.org/abs/2509.06290v1
• Date: Mon, 08 Sep 2025 02:23:57 GMT
• Title: Ramsey Interferometry with Qudits
• Authors: Branislav Ilikj, Nikolay V. Vitanov,
• Abstract summary: We build on Ramsey interferometry, extending it to qudits in Wigner-Majorana (WM) systems.<n>We show that replacing the two $pi/2$ pulses of standard Ramsey interferometry with the quantum Fourier transform provides no increase in resolution.<n>We quantify these advantages using a resolution--contrast index that enables direct comparison between different qudit dimensions.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Ramsey interferometry, a cornerstone technique in quantum spectroscopy, traditionally operates with qubits for high precision measurements. In this work we build on Ramsey interferometry, extending it to qudits in Wigner-Majorana (WM) systems where the internal degrees of freedom are used to achieve enhanced resolution. We also show that replacing the two $\pi/2$ pulses of standard Ramsey interferometry with the quantum Fourier transform provides no increase in resolution. Theoretical analysis further reveals that quantum systems with the WM symmetry are particularly well-suited for this objective, achieving substantial resolution improvements for a given interrogation time. Simulations and analytical solutions validate these predictions, confirming the feasibility and advantages of qudits in Ramsey interferometry. We quantify these advantages using a resolution--contrast index that enables direct comparison between different qudit dimensions. In particular, three state systems (qutrits) achieve a twofold resolution increase compared to qubits without contrast degradation, emerging as optimal for the qudit approach. Higher dimensional qudits achieve superior resolution enhancement at the cost of contrast degradation. These significant resolution gains establish qudits as attractive candidates for high-precision quantum metrology and sensing technologies.

Related papers

• Quantum sensing with critical systems: impact of symmetry, imperfections, and decoherence [3.162105123726839]
  Entangled many-body states enable high-precision quantum sensing beyond the standard quantum limit.<n>We develop interferometric sensing protocols based on quantum critical wavefunctions and compare their performance with Greenberger-Horne-Zeilinger (GHZ) and spin-squeezed states.<n>Building on the idea of symmetries as a metrological resource, we introduce a symmetry-based algorithm to identify optimal measurement strategies.
  arXiv  Detail & Related papers  (2026-01-07T20:09:23Z)
• Perfecting Depth: Uncertainty-Aware Enhancement of Metric Depth [33.61994004497114]
  We propose a novel two-stage framework for sensor depth enhancement, called Perfecting Depth.<n>This framework leverages the nature of diffusion models to automatically detect unreliable depth regions while preserving geometric cues.<n>Our framework sets a new baseline for sensor depth enhancement, with potential applications in autonomous driving, robotics, and immersive technologies.
  arXiv  Detail & Related papers  (2025-06-05T04:09:11Z)
• Efficient estimation of error bounds for quantum multiparametric imaging with constraints [37.69303106863453]
  We propose a practical algorithm for approximate construction of a modified Fisher information matrix.<n>We demonstrate the efficiency of the proposed technique by applying it to 1-, 2-, and multi- parameter model problems in quantum imaging.
  arXiv  Detail & Related papers  (2024-12-11T08:43:18Z)
• Superresolution in separation estimation between two dynamic incoherent sources using spatial demultiplexing [0.0]
  Recently, perfect measurement based on spatial mode demultiplexing (SPADE) in Hermite-Gauss modes allowed one to reach the quantum limit of precision for estimation of separation between two weak incoherent stationary sources. In this paper, we consider another deviation from the perfect setup by discarding the assumption about the stationarity of the sources. We formulate a measurement algorithm that allows for the reduction of one parameter for estimation in the stationary sources scenario.
  arXiv  Detail & Related papers  (2024-07-15T07:57:57Z)
• Noise-aware variational eigensolvers: a dissipative route for lattice gauge theories [40.772310187078475]
  We propose a novel variational ansatz for the ground-state preparation of the $mathbbZ$ lattice gauge theory (LGT) in quantum simulators. It combines dissipative and unitary operations in a completely deterministic scheme with a circuit depth that does not scale with the size of the considered lattice. We find that, with very few variational parameters, the ansatz can achieve $>!99%$ precision in energy in both the confined and deconfined phase of the $mathbbZ$ LGT.
  arXiv  Detail & Related papers  (2023-08-07T14:23:00Z)
• Atomic Ramsey interferometry with S- and D-band in a triangular optical lattice [1.0218999534163138]
  We develop a Ramsey interferometer with Bloch states in S- and D-band of a triangular optical lattice for the first time. This interferometer has potential applications in the quantum simulations of topological physics, frustrated effects, and motional qubits manipulation.
  arXiv  Detail & Related papers  (2022-11-08T06:43:46Z)
• Frequency-Aware Self-Supervised Monocular Depth Estimation [41.97188738587212]
  We present two versatile methods to enhance self-supervised monocular depth estimation models. The high generalizability of our methods is achieved by solving the fundamental and ubiquitous problems in photometric loss function. We are the first to propose blurring images to improve depth estimators with an interpretable analysis.
  arXiv  Detail & Related papers  (2022-10-11T14:30:26Z)
• Superresolution at the quantum limit beyond two point sources [0.0]
  We use general symmetry in a constellation to construct a quantum measurement that achieves the quantum Cramer-Rao bound in estimation of parameters. We show how this technique can be used to estimate parameters simultaneously in symmetric point-source constellations with more than two point sources.
  arXiv  Detail & Related papers  (2022-06-29T17:42:53Z)
• Degradation-agnostic Correspondence from Resolution-asymmetric Stereo [96.03964515969652]
  We study the problem of stereo matching from a pair of images with different resolutions, e.g., those acquired with a tele-wide camera system. We propose to impose the consistency between two views in a feature space instead of the image space, named feature-metric consistency. We find that, although a stereo matching network trained with the photometric loss is not optimal, its feature extractor can produce degradation-agnostic and matching-specific features.
  arXiv  Detail & Related papers  (2022-04-04T12:24:34Z)
• Analytical and experimental study of center line miscalibrations in M\o lmer-S\o rensen gates [51.93099889384597]
  We study a systematic perturbative expansion in miscalibrated parameters of the Molmer-Sorensen entangling gate. We compute the gate evolution operator which allows us to obtain relevant key properties. We verify the predictions from our model by benchmarking them against measurements in a trapped-ion quantum processor.
  arXiv  Detail & Related papers  (2021-12-10T10:56:16Z)
• Benchmarking Machine Learning Algorithms for Adaptive Quantum Phase Estimation with Noisy Intermediate-Scale Quantum Sensors [0.0]
  We show that adaptive methods can be used to enhance the precision of quantum phase estimation when noisy non-entangled qubits are used as sensors. We benchmark these schemes with respect to scenarios that include Gaussian and Random Telegraph fluctuations. We discuss their robustness against noise in connection with real experimental setups such as Mach-Zehnder interferometry with optical photons and Ramsey interferometry in trapped ions.
  arXiv  Detail & Related papers  (2021-08-16T09:10:32Z)
• Optimal non-classical correlations of light with a levitated nano-sphere [34.82692226532414]
  Nonclassical correlations provide a resource for many applications in quantum technology. Optomechanical systems can generate nonclassical correlations between the mechanical mode and a mode of travelling light. We propose automated optimization of the production of quantum correlations in such a system.
  arXiv  Detail & Related papers  (2020-06-26T15:27:47Z)
• Integration of spectator qubits into quantum computer architectures for hardware tuneup and calibration [0.0]
  We focus on the challenge of measuring spatially inhomogeneous quasi-static calibration errors using spectator qubits. We introduce a novel architectural concept for such spectator qubits: arranging them spatially according to prescriptions from optimal 2D approximation theory. We show that this insight allows for efficient reconstruction of inhomogeneities in qubit calibration.
  arXiv  Detail & Related papers  (2020-04-27T18:00:33Z)

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.