Critical quantum metrology in a stabilized two-photon Rabi model

• URL: http://arxiv.org/abs/2503.19198v1
• Date: Mon, 24 Mar 2025 22:50:41 GMT
• Title: Critical quantum metrology in a stabilized two-photon Rabi model
• Authors: Zu-Jian Ying, Hang-Hang Han, Bo-Jian Li, Simone Felicetti, Daniel Braak,
• Abstract summary: We introduce a generalized quantum Rabi model (QRM) with two- and four-photon terms.<n>We find that the four-photon term entails a much higher measurement precision compared to the standard two-photon QRM.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We investigate a generalized quantum Rabi model (QRM) with two- and four-photon terms with respect to applications for non-linear critical quantum metrology. In the introduced model, the spectral collapse occurring in the standard two-photon QRM is stabilized by the presence of the quartic potential. The collapse is then transformed into a quantum phase transition, which occurs in the low-frequency limit of the light mode, whose remnant at finite ratio between qubit and mode frequencies can be applied to critically enhanced quantum metrology. We find that the four-photon term entails a much higher measurement precision compared to the standard two-photon QRM. The mechanism behind the higher precision can be traced to the different behavior of the ground state wave function as the system is tuned through the transition. As the standard two-photon QRM, despite the absence of the spectral collapse, our model allows for a finite preparation time for the probe state (PTPS).

Related papers

• Quantum Features of the Thermal Two-Qubit Quantum Rabi Model in Ultra- and Deep-Strong Regimes [0.0]
  Two-qubit quantum Rabi model (2QQRM) describes two qubits coupled to a single bosonic mode. In this work, we investigate the persistence of quantum correlations and non-classical states in the 2QQRM at thermal equilibrium.
  arXiv  Detail & Related papers  (2025-03-31T01:38:16Z)
• Limits for coherent optical control of quantum emitters in layered materials [49.596352607801784]
  coherent control of a two-level system is among the most essential challenges in modern quantum optics. We use a mechanically isolated quantum emitter in hexagonal boron nitride to explore the individual mechanisms which affect the coherence of an optical transition under resonant drive. New insights on the underlying physical decoherence mechanisms reveals a limit in temperature until which coherent driving of the system is possible.
  arXiv  Detail & Related papers  (2023-12-18T10:37:06Z)
• Hyper-entanglement between pulse modes and frequency bins [101.18253437732933]
  Hyper-entanglement between two or more photonic degrees of freedom (DOF) can enhance and enable new quantum protocols. We demonstrate the generation of photon pairs hyper-entangled between pulse modes and frequency bins.
  arXiv  Detail & Related papers  (2023-04-24T15:43:08Z)
• Quantum Microscopy of Cells at the Heisenberg Limit [18.30334680254671]
  We present quantum microscopy by coincidence (QMC) with balanced pathlengths. QMC benefits from a configuration with balanced pathlengths, where a pair of entangled photons traversing symmetric paths with balanced optical pathlengths in two arms behave like a single photon with half the wavelength. The low intensity and entanglement features of biphotons in QMC promise nondestructive bioimaging.
  arXiv  Detail & Related papers  (2023-03-08T23:44:40Z)
• Critical Quantum Metrology in the Non-Linear Quantum Rabi Model [1.875899282042793]
  The quantum Rabi model (QRM) with linear coupling between light mode and qubit exhibits the analog of a second order phase transition for vanishing mode frequency. We show that the QRM including a non-linear coupling term exhibits much higher measurement precisions due to its first order like phase transition at emphfinite frequency.
  arXiv  Detail & Related papers  (2022-06-16T19:03:28Z)
• Quantifying n-photon indistinguishability with a cyclic integrated interferometer [40.24757332810004]
  We report on a universal method to measure the genuine indistinguishability of n-photons. Our approach relies on a low-depth cyclic multiport interferometer with N = 2n modes. We experimentally demonstrate this technique for a 8-mode integrated interferometer fabricated using femtosecond laser micromachining.
  arXiv  Detail & Related papers  (2022-01-31T16:30:52Z)
• Observation of a quantum phase transition in the quantum Rabi model with a single trapped ion [0.0]
  Quantum phase transitions (QPTs) are usually associated with many-body systems with large degrees of freedom approaching the thermodynamic limit. It has been realized that a QPT can occur in a simple system composed of only a two-level atom and a single-mode bosonic field. We report the first experimental demonstration of a QPT in the quantum Rabi model using a single trapped ion.
  arXiv  Detail & Related papers  (2021-02-10T13:03:37Z)
• Superposition of two-mode squeezed states for quantum information processing and quantum sensing [55.41644538483948]
  We investigate superpositions of two-mode squeezed states (TMSSs) TMSSs have potential applications to quantum information processing and quantum sensing.
  arXiv  Detail & Related papers  (2021-02-01T18:09:01Z)
• Hyperentanglement in structured quantum light [50.591267188664666]
  Entanglement in high-dimensional quantum systems, where one or more degrees of freedom of light are involved, offers increased information capacities and enables new quantum protocols. Here, we demonstrate a functional source of high-dimensional, noise-resilient hyperentangled states encoded in time-frequency and vector-vortex structured modes. We generate highly entangled photon pairs at telecom wavelength that we characterise via two-photon interference and quantum state tomography, achieving near-unity visibilities and fidelities.
  arXiv  Detail & Related papers  (2020-06-02T18:00:04Z)
• Spectrally reconfigurable quantum emitters enabled by optimized fast modulation [42.39394379814941]
  Spectral control in solid state platforms such as color centers, rare earth ions, and quantum dots is attractive for realizing such applications on-chip. We propose the use of frequency-modulated optical transitions for spectral engineering of single photon emission. Our results suggest that frequency modulation is a powerful technique for the generation of new light states with unprecedented control over the spectral and temporal properties of single photons.
  arXiv  Detail & Related papers  (2020-03-27T18:24:35Z)
• Quantum Statistical Complexity Measure as a Signalling of Correlation Transitions [55.41644538483948]
  We introduce a quantum version for the statistical complexity measure, in the context of quantum information theory, and use it as a signalling function of quantum order-disorder transitions. We apply our measure to two exactly solvable Hamiltonian models, namely: the $1D$-Quantum Ising Model and the Heisenberg XXZ spin-$1/2$ chain. We also compute this measure for one-qubit and two-qubit reduced states for the considered models, and analyse its behaviour across its quantum phase transitions for finite system sizes as well as in the thermodynamic limit by using Bethe ansatz.
  arXiv  Detail & Related papers  (2020-02-05T00:45:21Z)
• Entanglement robustness to excitonic spin precession in a quantum dot [43.55994393060723]
  A semiconductor quantum dot (QD) is an attractive resource to generate polarization-entangled photon pairs. We study the excitonic spin precession (flip-flop) in a family of QDs with different excitonic fine-structure splitting (FSS) Our results reveal that coherent processes leave the time post-selected entanglement of QDs unaffected while changing the eigenstates of the system.
  arXiv  Detail & Related papers  (2020-01-31T13:50:51Z)
• Experimental Observation of Equilibrium and Dynamical Quantum Phase Transitions via Out-of-Time-Ordered Correlators [14.389514788367086]
  We report the first experimental observation of EQPTs and DQPTs in a quantum spin chain via quench dynamics of OTOC on a nuclear magnetic resonance quantum simulator. We demonstrate that the long-time average value of the OTOC in quantum quench signals the equilibrium quantum critical point and ordered quantum phases.
  arXiv  Detail & Related papers  (2019-12-27T09:35:07Z)

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.