Quantum probes for the characterization of nonlinear media
- URL: http://arxiv.org/abs/2109.08058v2
- Date: Mon, 18 Oct 2021 13:34:17 GMT
- Title: Quantum probes for the characterization of nonlinear media
- Authors: Alessandro Candeloro, Sholeh Razavian, Matteo Piccolini, Berihu Teklu,
Stefano Olivares, and Matteo G. A. Paris
- Abstract summary: We investigate how squeezed probes may improve individual and joint estimation of the nonlinear coupling $tildelambda$ and of the nonlinearity order $zeta$.
We conclude that quantum probes represent a resource to enhance precision in the characterization of nonlinear media, and foresee potential applications with current technology.
- Score: 50.591267188664666
- License: http://creativecommons.org/licenses/by-nc-nd/4.0/
- Abstract: Active optical media leading to interaction Hamiltonians of the form $ H =
\tilde{\lambda}\, (a + a^{\dagger})^{\zeta}$ represent a crucial resource for
quantum optical technology. In this paper, we address the characterization of
those nonlinear media using quantum probes, as opposed to semiclassical ones.
In particular, we investigate how squeezed probes may improve individual and
joint estimation of the nonlinear coupling $\tilde{\lambda}$ and of the
nonlinearity order $\zeta$. Upon using tools from quantum estimation, we show
that: i) the two parameters are compatible, i.e. the may be jointly estimated
without additional quantum noise; ii) the use of squeezed probes improves
precision at fixed overall energy of the probe; iii) for low energy probes,
squeezed vacuum represent the most convenient choice, whereas for increasing
energy an optimal squeezing fraction may be determined; iv) using optimized
quantum probes, the scaling of the corresponding precision with energy
improves, both for individual and joint estimation of the two parameters,
compared to semiclassical coherent probes. We conclude that quantum probes
represent a resource to enhance precision in the characterization of nonlinear
media, and foresee potential applications with current technology.
Related papers
- A Linear Quantum Coupler for Clean Bosonic Control [40.363378379378524]
An ideal quantum nonlinearity would selectively activate desired coherent processes at high strength.
The wide bandwidth of the Josephson nonlinearity makes this difficult, with undesired drive-induced transitions and decoherence limiting qubit readout, gates, couplers and amplifiers.
We propose a novel mixer that combines both these strengths, with engineered selection rules that make it essentially linear (not just Kerr-free) when idle, and activate clean parametric processes even when driven at high strength.
arXiv Detail & Related papers (2025-01-29T22:26:14Z) - Optimal asymptotic precision bounds for nonlinear quantum metrology under collective dephasing [0.0]
Dephasing noise remains a leading source of decoherence in state-of-the-art quantum sensing platforms.
We analyze the impact of classical em collective dephasing with arbitrary temporal correlations on the performance of generalized interferometry protocols.
arXiv Detail & Related papers (2024-12-30T23:55:24Z) - Quantum-enhanced sensing of spin-orbit coupling without fine-tuning [0.0]
Heisenberg limited enhanced precision is achieved across a wide range of parameters.
We have demonstrated quantum enhanced sensitivity for both single particle and interacting many-body probes.
arXiv Detail & Related papers (2024-11-01T14:00:23Z) - Approaching the double-Heisenberg scaling sensitivity in the Tavis-Cummings model [2.3944840403392185]
We prove that the prototypical cavity quantum electrodynamics system, such as the Tavis-Cummings model, enables us to achieve double-HS precision.
Such a double sensibility can be experimentally realized by introducing either photon- or atom-number fluctuations through quantum squeezing.
arXiv Detail & Related papers (2024-03-08T12:59:47Z) - Estimating the concentration of chiral media with bright squeezed light [77.34726150561087]
We quantify the performance of Gaussian probes in estimating the concentration of chiral analytes.
Four-fold precision enhancement is achievable using state-of-the-art squeezing levels and intensity measurements.
arXiv Detail & Related papers (2022-08-21T17:18:10Z) - Characterizing Multipartite Non-Gaussian Entanglement for Three-Mode
Spontaneous Parametric Down-Conversion Process [13.641728072655278]
We present an experimentally practical method to characterize continuous-variable multipartite non-Gaussian entanglement.
We show that our method can be readily used to confirm fully inseparable tripartite non-Gaussian entangled states.
arXiv Detail & Related papers (2022-07-14T03:22:22Z) - Enhanced nonlinear quantum metrology with weakly coupled solitons and
particle losses [58.720142291102135]
We offer an interferometric procedure for phase parameters estimation at the Heisenberg (up to 1/N) and super-Heisenberg scaling levels.
The heart of our setup is the novel soliton Josephson Junction (SJJ) system providing the formation of the quantum probe.
We illustrate that such states are close to the optimal ones even with moderate losses.
arXiv Detail & Related papers (2021-08-07T09:29:23Z) - Designing Kerr Interactions for Quantum Information Processing via
Counterrotating Terms of Asymmetric Josephson-Junction Loops [68.8204255655161]
static cavity nonlinearities typically limit the performance of bosonic quantum error-correcting codes.
Treating the nonlinearity as a perturbation, we derive effective Hamiltonians using the Schrieffer-Wolff transformation.
Results show that a cubic interaction allows to increase the effective rates of both linear and nonlinear operations.
arXiv Detail & Related papers (2021-07-14T15:11:05Z) - Quantum Metrology with Coherent Superposition of Two Different Coded
Channels [1.430924337853801]
We show that the Heisenberg limit $1/N$ can be beaten by the coherent superposition without the help of indefinite causal order.
We analytically obtain the general form of estimation precision in terms of the quantum Fisher information.
Our results can help to construct a high-precision measurement equipment.
arXiv Detail & Related papers (2020-12-03T13:25:16Z) - Quantum probes for universal gravity corrections [62.997667081978825]
We review the concept of minimum length and show how it induces a perturbative term appearing in the Hamiltonian of any quantum system.
We evaluate the Quantum Fisher Information in order to find the ultimate bounds to the precision of any estimation procedure.
Our results show that quantum probes are convenient resources, providing potential enhancement in precision.
arXiv Detail & Related papers (2020-02-13T19:35:07Z)
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.