Entanglement-enhanced sensing using a chain of qubits with always-on nearest-neighbor interactions

• URL: http://arxiv.org/abs/2101.02998v3
• Date: Wed, 9 Jun 2021 09:23:48 GMT
• Title: Entanglement-enhanced sensing using a chain of qubits with always-on nearest-neighbor interactions
• Authors: Atsuki Yoshinaga, Mamiko Tatsuta, Yuichiro Matsuzaki
• Abstract summary: We propose an entanglement-enhanced sensing scheme with an always-on nearest-neighbor interaction between qubits. We can achieve an improved sensitivity beyond the standard quantum limit even under the effect of realistic decoherence.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Quantum metrology is the use of genuinely quantum properties such as entanglement as a resource to outperform classical sensing strategies. Typically, entanglement is created by implementing gate operations or inducing many-body interactions. However, existing sensing schemes with these approaches require accurate control of the probe system such as switching on and off the interaction among qubits, which can be challenging for practical applications. Here, we propose an entanglement-enhanced sensing scheme with an always-on nearest-neighbor interaction between qubits. We adopt the transverse field Ising chain as the probe system, making use of the so-called quantum domino dynamics for the generation of the entangled states. In addition to the advantage that our scheme can be implemented without controlling the interactions, it only requires initialization of the system, projective measurements on a single qubit, and control of the uniform magnetic fields. We can achieve an improved sensitivity beyond the standard quantum limit even under the effect of realistic decoherence.

Related papers

• Quantum control by the environment: Turing uncomputability, Optimization over Stiefel manifolds, Reachable sets, and Incoherent GRAPE [56.47577824219207]
  In many practical situations, the controlled quantum systems are open, interacting with the environment. In this note, we briefly review some results on control of open quantum systems using environment as a resource.
  arXiv  Detail & Related papers  (2024-03-20T10:09:13Z)
• Quantum Advantage of One-Way Squeezing in Enhancing Weak-Force Sensing [7.225053055214059]
  We propose how to further improve the performance of quantum COM sensors by breaking reciprocal symmetry in purely quantum regime. We consider a spinning COM resonator and show that by selectively driving it in opposite directions, highly nonreciprocal optical squeezing can emerge. Our work confirms that breaking reciprocal symmetry, already achieved in diverse systems well beyond spinning systems, can serve as a new strategy to further enhance the abilities of advanced quantum sensors.
  arXiv  Detail & Related papers  (2024-03-15T02:51:52Z)
• Qubit-environment entanglement in time-dependent pure dephasing [0.0]
  We show that the methods for quantifying system-environment entanglement can be straightforwardly generalized to time-dependent Hamiltonians. We use these methods to study the nature of the decoherence of a qubit-oscillator system.
  arXiv  Detail & Related papers  (2023-12-05T11:23:25Z)
• 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)
• Optimal quantum control via genetic algorithms for quantum state engineering in driven-resonator mediated networks [68.8204255655161]
  We employ a machine learning-enabled approach to quantum state engineering based on evolutionary algorithms. We consider a network of qubits -- encoded in the states of artificial atoms with no direct coupling -- interacting via a common single-mode driven microwave resonator. We observe high quantum fidelities and resilience to noise, despite the algorithm being trained in the ideal noise-free setting.
  arXiv  Detail & Related papers  (2022-06-29T14:34:00Z)
• 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)
• Interactive Protocols for Classically-Verifiable Quantum Advantage [46.093185827838035]
  "Interactions" between a prover and a verifier can bridge the gap between verifiability and implementation. We demonstrate the first implementation of an interactive quantum advantage protocol, using an ion trap quantum computer.
  arXiv  Detail & Related papers  (2021-12-09T19:00:00Z)
• 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)
• Sensing quantum chaos through the non-unitary geometric phase [62.997667081978825]
  We propose a decoherent mechanism for sensing quantum chaos. The chaotic nature of a many-body quantum system is sensed by studying the implications that the system produces in the long-time dynamics of a probe coupled to it.
  arXiv  Detail & Related papers  (2021-04-13T17:24:08Z)
• Experimental implementation of precisely tailored light-matter interaction via inverse engineering [5.131683740032632]
  shortcuts to adiabaticity, originally proposed to speed up slow adiabatic process, have nowadays become versatile toolboxes. Here, we implement fast and robust control for the state preparation and state engineering in a rare-earth ions system. We demonstrate that our protocols surpass the conventional adiabatic schemes, by reducing the decoherence from the excited state decay and inhomogeneous broadening.
  arXiv  Detail & Related papers  (2021-01-29T08:17:01Z)
• Simulating nonnative cubic interactions on noisy quantum machines [65.38483184536494]
  We show that quantum processors can be programmed to efficiently simulate dynamics that are not native to the hardware. On noisy devices without error correction, we show that simulation results are significantly improved when the quantum program is compiled using modular gates.
  arXiv  Detail & Related papers  (2020-04-15T05:16:24Z)

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.