Modular Many-Body Quantum Sensors

• URL: http://arxiv.org/abs/2311.18319v2
• Date: Wed, 7 Aug 2024 05:58:11 GMT
• Title: Modular Many-Body Quantum Sensors
• Authors: Chiranjib Mukhopadhyay, Abolfazl Bayat,
• Abstract summary: We develop a modular approach for introducing multiple phase transitions in a many-body system. This naturally allows us to enlarge the region of quantum-enhanced precision by encompassing the newly created phase boundaries. In symmetry-breaking sensors, we show that the newly created critical points inherit the original class and a simple total magnetization measurement already suffices to locate them. In topological sensors, our modular construction creates multiple bands which leads to a rich phase diagram.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Quantum many-body systems undergoing phase transitions have been proposed as probes enabling beyond-classical enhancement of sensing precision. However, this enhancement is usually limited to a very narrow region around the critical point. Here, we systematically develop a modular approach for introducing multiple phase transitions in a many-body system. This naturally allows us to enlarge the region of quantum-enhanced precision by encompassing the newly created phase boundaries. Our approach is general and can be applied to both symmetry-breaking and topological quantum sensors. In symmetry-breaking sensors, we show that the newly created critical points inherit the original universality class and a simple total magnetization measurement already suffices to locate them. In topological sensors, our modular construction creates multiple bands which leads to a rich phase diagram. In both cases, Heisenberg scaling for Hamiltonian parameter estimation is achieved at all the phase boundaries. This can be exploited to create a global sensor which significantly outperforms a uniform probe.

Related papers

• 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)
• Thermalization and Criticality on an Analog-Digital Quantum Simulator [133.58336306417294]
  We present a quantum simulator comprising 69 superconducting qubits which supports both universal quantum gates and high-fidelity analog evolution. We observe signatures of the classical Kosterlitz-Thouless phase transition, as well as strong deviations from Kibble-Zurek scaling predictions. We digitally prepare the system in pairwise-entangled dimer states and image the transport of energy and vorticity during thermalization.
  arXiv  Detail & Related papers  (2024-05-27T17:40:39Z)
• Evolution of many-body systems under ancilla quantum measurements [58.720142291102135]
  We study the concept of implementing quantum measurements by coupling a many-body lattice system to an ancillary degree of freedom. We find evidence of a disentangling-entangling measurement-induced transition as was previously observed in more abstract models.
  arXiv  Detail & Related papers  (2023-03-13T13:06:40Z)
• Stark localization as a resource for weak-field sensing with super-Heisenberg precision [1.5484595752241124]
  Stark systems can be used as a probe for the precise measurement of gradient fields. In the extended phase, Stark probes achieve super-Heisenberg precision. Quantum-enhanced sensitivity is still achievable even when state preparation time is included.
  arXiv  Detail & Related papers  (2023-01-25T10:41:53Z)
• Multi-squeezed state generation and universal bosonic control via a driven quantum Rabi model [68.8204255655161]
  Universal control over a bosonic degree of freedom is key in the quest for quantum-based technologies. Here we consider a single ancillary two-level system, interacting with the bosonic mode of interest via a driven quantum Rabi model. We show that it is sufficient to induce the deterministic realization of a large class of Gaussian and non-Gaussian gates, which in turn provide universal bosonic control.
  arXiv  Detail & Related papers  (2022-09-16T14:18:53Z)
• Sequential measurements for quantum-enhanced magnetometry in spin chain probes [0.0]
  We introduce a different approach to obtain quantum-enhanced sensitivity in a many-body probe through utilizing the nature of quantum measurement. Our protocol consists of a sequence of local measurements, without re-initialization, performed regularly during the evolution of a many-body probe.
  arXiv  Detail & Related papers  (2022-01-31T22:00:44Z)
• Free-Fermionic Topological Quantum Sensors [0.0]
  We analytically demonstrate that quantum enhanced sensing is possible using topological edge states near the phase boundary. While neither symmetry-breaking nor long-range entanglement are essential, gap closing remains as the major candidate for the ultimate source of quantum enhanced sensing.
  arXiv  Detail & Related papers  (2022-01-18T16:27:46Z)
• 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)
• Spin many-body phases in standard and topological waveguide QED simulators [68.8204255655161]
  We study the many-body behaviour of quantum spin models using waveguide QED setups. We find novel many-body phases different from the ones obtained in other platforms.
  arXiv  Detail & Related papers  (2021-06-22T09:44:20Z)
• Integrable quantum many-body sensors for AC field sensing [0.0]
  We show that integrable many-body systems can be exploited efficiently for detecting the amplitude of an AC field. We show that the proposed protocol can also be realized in near-term quantum simulators.
  arXiv  Detail & Related papers  (2021-05-27T23:52:22Z)
• Universality of entanglement transitions from stroboscopic to continuous measurements [68.8204255655161]
  We show that the entanglement transition at finite coupling persists if the continuously measured system is randomly nonintegrable. This provides a bridge between a wide range of experimental settings and the wealth of knowledge accumulated for the latter systems.
  arXiv  Detail & Related papers  (2020-05-04T21:45:59Z)

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.