Experimental quantum-enhanced response function estimation

• URL: http://arxiv.org/abs/2007.15564v1
• Date: Thu, 30 Jul 2020 16:13:03 GMT
• Title: Experimental quantum-enhanced response function estimation
• Abstract summary: We show an experimental realization of function estimation based on a photonic achitecture. Our results show how quantum resources should successfully be employed to access the rich information contained in continuous signals.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Characterizing a system often demands learning its response function to an applied field. Such knowledge is rooted on the experimental evaluation of punctual fiducial response and interpolation to access prediction at arbitrary values. Quantum metrological resources are known to provide enhancement in assessing these fiducial points, but the implications for improved function estimation have only recently been explored, and have not been yet demonstrated. Here we show an experimental realization of function estimation based on a photonic achitecture. The phase response of a liquid-crystal to a voltage has been reconstructed by means of quantum and classical phase estimation, providing evidence of the superiority of the former and highlighting the interplay between punctual statistical error and interpolation error. Our results show how quantum resources should successfully be employed to access the rich information contained in continuous signals.

Related papers

• Canonical quantization of neurons [51.809748057605184]
  We apply canonical quantization to a fundamental computational primitive of machine learning: the neuron.<n>We develop hybrid quantum-classical algorithms for training and evaluation.<n>Our work establishes canonical quantization as a principled framework for constructing quantum machine learning primitives.
  arXiv  Detail & Related papers  (2026-07-06T12:39:06Z)
• Repeated weak measurements: watching quantum correlations evolve [0.0]
  Experimental access to many-body quantum systems is often limited by measurement backaction.<n>Here we replace this active paradigm with a minimally invasive protocol based on a pair of weak quantum measurements.<n>We demonstrate this technique in an atomic Bose-Einstein condensate.
  arXiv  Detail & Related papers  (2026-04-20T02:03:21Z)
• Detection of quantum imaginarity using moments and its interferometric realization [0.0]
  We propose a realistic and experimentally feasible method to detect quantum imaginarity.<n>Our framework relies on experimentally accessible moments of the Kirkwood-Dirac quasiprobability distribution.
  arXiv  Detail & Related papers  (2026-03-31T19:12:45Z)
• Double Machine Learning of Continuous Treatment Effects with General Instrumental Variables [5.00731378650601]
  Estimating causal effects of continuous treatments is a common problem in practice.<n>We propose a novel framework for local identification of dose-response functions using instrumental variables.
  arXiv  Detail & Related papers  (2026-01-04T10:29:53Z)
• Active Hypothesis Testing for Quantum Detection of Phase-Shift Keying Coherent States [21.270496914042997]
  This paper explores the quantum detection of Phase-Shift Keying (PSK)-coded coherent states through the lens of active hypothesis testing. With coherent state slicing, we formulate the problem as a controlled sensing task in which observation kernels have parameters shrinking with sample size. Surprisingly, the exponent-optimal open-loop policy for binary PSK with high dark counts is not simply time-sharing.
  arXiv  Detail & Related papers  (2025-01-27T17:09:01Z)
• Efficient detection of non-classicality of continuous variable states using moments of Wigner function [0.0]
  States with negative Wigner function, a significant subclass of non-classical states, serve as a valuable resource for quantum information processing tasks. We provide a criterion for detecting such quantum states exhibiting negative Wigner function.
  arXiv  Detail & Related papers  (2024-07-16T18:54:41Z)
• Interferometry of quantum correlation functions to access quasiprobability distribution of work [0.0]
  We use an interferometric scheme aided by an auxiliary system to reconstruct the Kirkwood-Dirac quasiprobability distribution. We experimentally demonstrate this scheme in an electron-nuclear spin system associated with a nitrogen-vacancy center in diamond. Our results clarify the physical meaning of the work quasiprobability distribution in the context of quantum thermodynamics.
  arXiv  Detail & Related papers  (2024-05-31T17:32:02Z)
• Nonlinear Spectroscopy via Generalized Quantum Phase Estimation [0.0]
  Response theory has a successful history of connecting experimental observations with theoretical predictions. The calculation of response properties for quantum systems is often expensive, especially for nonlinear spectroscopy. In this work, we introduce a generalized quantum phase estimation framework. This allows the treatment of general correlation functions enabling the recovery of response properties of arbitrary orders.
  arXiv  Detail & Related papers  (2024-05-22T18:00:01Z)
• Sonification of Wigner functions: case study of intense light-matter interactions [0.3749861135832073]
  Wigner function $rho_W(textbfr,textbfp)$ serves as a phase-space representation. It might serve as a tool to express quantum systems intuitively, for example, by using sonification techniques.
  arXiv  Detail & Related papers  (2024-03-18T21:34:58Z)
• Prediction and Control in Continual Reinforcement Learning [39.30411018922005]
  Temporal difference (TD) learning is often used to update the estimate of the value function which is used by RL agents to extract useful policies. We propose to decompose the value function into two components which update at different timescales.
  arXiv  Detail & Related papers  (2023-12-18T19:23:42Z)
• Denoising and Extension of Response Functions in the Time Domain [48.52478746418526]
  Response functions of quantum systems describe the response of a system to an external perturbation. In equilibrium and steady-state systems, they correspond to a positive spectral function in the frequency domain.
  arXiv  Detail & Related papers  (2023-09-05T20:26:03Z)
• Data-driven reactivity prediction of targeted covalent inhibitors using computed quantum features for drug discovery [0.0]
  We present an approach to combine novel molecular features with experimental data within a data-driven pipeline. We demonstrate utility in predicting reactivity using features extracted from a workflow which employs quantum embedding of the reactive warhead. The calculated features form a quantum fingerprint' which allows molecules to be clustered with regard to warhead properties.
  arXiv  Detail & Related papers  (2023-07-18T22:51:16Z)
• Weak-valued correlation functions: Insights and precise readout strategies [5.3876722808329935]
  The correlation function in quantum systems plays a vital role in decoding their properties and gaining insights into physical phenomena. By defining weak-valued correlation function, we propose the basic insights and the universal methods for recording them on the apparatus through weak measurement.
  arXiv  Detail & Related papers  (2023-06-07T12:58:44Z)
• A linear response framework for simulating bosonic and fermionic correlation functions illustrated on quantum computers [58.720142291102135]
  Lehmann formalism for obtaining response functions in linear response has no direct link to experiment. Within the context of quantum computing, we make the experiment an inextricable part of the quantum simulation. We show that both bosonic and fermionic Green's functions can be obtained, and apply these ideas to the study of a charge-density-wave material.
  arXiv  Detail & Related papers  (2023-02-20T19:01:02Z)
• Special functions in quantum phase estimation [61.12008553173672]
  We focus on two special functions. One is prolate spheroidal wave function, which approximately gives the maximum probability that the difference between the true parameter and the estimate is smaller than a certain threshold. The other is Mathieu function, which exactly gives the optimum estimation under the energy constraint.
  arXiv  Detail & Related papers  (2023-02-14T08:33:24Z)
• Experimental violations of Leggett-Garg's inequalities on a quantum computer [77.34726150561087]
  We experimentally observe the violations of Leggett-Garg-Bell's inequalities on single and multi-qubit systems. Our analysis highlights the limits of nowadays quantum platforms, showing that the above-mentioned correlation functions deviate from theoretical prediction as the number of qubits and the depth of the circuit grow.
  arXiv  Detail & Related papers  (2021-09-06T14:35:15Z)
• Experimental progress on quantum coherence: detection, quantification, and manipulation [55.41644538483948]
  Recently there has been significant interest in the characterization of quantum coherence as a resource. We discuss the main platforms for realizing the experiments: linear optics, nuclear magnetic resonance, and superconducting systems. We also review experiments exploring the connections between coherence and uncertainty relations, path information, and coherence of operations and measurements.
  arXiv  Detail & Related papers  (2021-05-14T14:30:47Z)
• Leveraging Global Parameters for Flow-based Neural Posterior Estimation [90.21090932619695]
  Inferring the parameters of a model based on experimental observations is central to the scientific method. A particularly challenging setting is when the model is strongly indeterminate, i.e., when distinct sets of parameters yield identical observations. We present a method for cracking such indeterminacy by exploiting additional information conveyed by an auxiliary set of observations sharing global parameters.
  arXiv  Detail & Related papers  (2021-02-12T12:23:13Z)

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.