Entanglement-Enhanced Quantum Strategies for Accurate Estimation of Multibody Group Motion and Moving Object Characteristics

• URL: http://arxiv.org/abs/2309.15546v1
• Date: Wed, 27 Sep 2023 10:09:13 GMT
• Title: Entanglement-Enhanced Quantum Strategies for Accurate Estimation of Multibody Group Motion and Moving Object Characteristics
• Authors: Yongqiang Li and Changliang Ren
• Abstract summary: This study presents a quantum strategy for simultaneous estimation of two physical quantities using different entanglement resources. The proposed method enables the detection of central position and relative velocity of multibody systems, as well as precise measurement of size and velocity of moving objects.
• Score: 2.4533167913340757
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: This study presents a quantum strategy for simultaneous estimation of two physical quantities using different entanglement resources. We explore the utilization of positively or negatively timecorrelated photons. The proposed method enables the detection of central position and relative velocity of multibody systems, as well as precise measurement of size and velocity of moving objects. Comparative analysis with other strategies reveals the superior quantum advantage of our approach, particularly when appropriate entanglement sources with high entanglement degree are employed. These findings contribute to advancing our understanding of quantum strategies for accurate measurements.

Related papers

• Quantum metrology with a continuous-variable system [0.0]
  We discuss precision limits and optimal strategies in quantum metrology and sensing with a single mode of quantum continuous variables. We summarize some of the main experimental achievements and present emerging platforms for continuous-variable sensing.
  arXiv  Detail & Related papers  (2024-11-06T18:57:07Z)
• Artificially intelligent Maxwell's demon for optimal control of open quantum systems [3.8043829889888716]
  We employ a reinforcement learning approach to automate and capture the role of a quantum Maxwell's demon. We explore different regimes based on the ordering between the thermalization, the measurement, and the unitary feedback timescales. We find strategies with elaborate finite-time thermalization protocols conditioned on measurement outcomes.
  arXiv  Detail & Related papers  (2024-08-27T18:00:02Z)
• Experimental benchmarking of quantum state overlap estimation strategies with photonic systems [17.062416865186307]
  We compare four strategies for overlap estimation, including tomography-tomography, tomography-projection, Schur collective measurement and optical swap test. With a photonic system, the overlap-dependent estimation precision for each strategy is quantified in terms of the average estimation variance over uniformly sampled states. Our results shed new light on extracting the parameter of interest from quantum systems, prompting the design of efficient quantum protocols.
  arXiv  Detail & Related papers  (2024-06-10T21:33:10Z)
• Effect of the readout efficiency of quantum measurement on the system entanglement [44.99833362998488]
  We quantify the entanglement for a particle on a 1d quantum random walk under inefficient monitoring. We find that the system's maximal mean entanglement at the measurement-induced quantum-to-classical crossover is in different ways by the measurement strength and inefficiency.
  arXiv  Detail & Related papers  (2024-02-29T18:10:05Z)
• Enhanced Entanglement in the Measurement-Altered Quantum Ising Chain [46.99825956909532]
  Local quantum measurements do not simply disentangle degrees of freedom, but may actually strengthen the entanglement in the system. This paper explores how a finite density of local measurement modifies a given state's entanglement structure.
  arXiv  Detail & Related papers  (2023-10-04T09:51:00Z)
• Continuous-variable quantum optics and resource theory for ultrafast semiconductor spectroscopy [0.0]
  We focus on multichannel homodyne detection as a powerful tool to measure the quantum coherence and the full density matrix of a polariton system. By monitoring the temporal decay of quantum coherence in the polariton condensate, we observe coherence times exceeding the nanosecond scale. The combination of tailored resource quantifiers and ultrafast spectroscopy techniques presented here paves the way for future applications of quantum information technologies.
  arXiv  Detail & Related papers  (2023-06-02T13:56:47Z)
• Guaranteed efficient energy estimation of quantum many-body Hamiltonians using ShadowGrouping [55.47824411563162]
  Estimation of the energy of quantum many-body systems is a paradigmatic task in various research fields. We aim to find the optimal strategy with single-qubit measurements that yields the highest provable accuracy given a total measurement budget. We develop a practical, efficient estimation strategy, which we call ShadowGrouping.
  arXiv  Detail & Related papers  (2023-01-09T14:41:07Z)
• Scalable approach to many-body localization via quantum data [69.3939291118954]
  Many-body localization is a notoriously difficult phenomenon from quantum many-body physics. We propose a flexible neural network based learning approach that circumvents any computationally expensive step. Our approach can be applied to large-scale quantum experiments to provide new insights into quantum many-body physics.
  arXiv  Detail & Related papers  (2022-02-17T19:00:09Z)
• Preparing random states and benchmarking with many-body quantum chaos [48.044162981804526]
  We show how to predict and experimentally observe the emergence of random state ensembles naturally under time-independent Hamiltonian dynamics. The observed random ensembles emerge from projective measurements and are intimately linked to universal correlations built up between subsystems of a larger quantum system. Our work has implications for understanding randomness in quantum dynamics, and enables applications of this concept in a wider context.
  arXiv  Detail & Related papers  (2021-03-05T08:32:43Z)
• Single-copies estimation of entanglement negativity [1.7179583883220435]
  Entanglement plays a central role in quantum information processing. We propose a scheme to estimate the entanglement negativity of any bi- partition of a composite system.
  arXiv  Detail & Related papers  (2020-04-23T17:57:01Z)
• 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)
• Direct estimation of quantum coherence by collective measurements [54.97898890263183]
  We introduce a collective measurement scheme for estimating the amount of coherence in quantum states. Our scheme outperforms other estimation methods based on tomography or adaptive measurements. We show that our method is accessible with today's technology by implementing it experimentally with photons.
  arXiv  Detail & Related papers  (2020-01-06T03:50:42Z)

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.