Large Quantum Delocalization of a Levitated Nanoparticle using Optimal Control: Applications for Force Sensing and Entangling via Weak Forces

• URL: http://arxiv.org/abs/2012.12260v2
• Date: Wed, 28 Jul 2021 13:54:26 GMT
• Title: Large Quantum Delocalization of a Levitated Nanoparticle using Optimal Control: Applications for Force Sensing and Entangling via Weak Forces
• Authors: T. Weiss, M. Roda-Llordes, E. Torrontegui, M. Aspelmeyer, O. Romero-Isart
• Abstract summary: We propose to optimally control the harmonic potential of a levitated nanoparticle to quantum delocalize its center-of-mass motional state to a length scale orders of magnitude larger than the quantum zero-point motion. We show that this fast loop protocol can be used to enhance force sensing as well as to dramatically boost the entangling rate of two weakly interacting nanoparticles.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We propose to optimally control the harmonic potential of a levitated nanoparticle to quantum delocalize its center-of-mass motional state to a length scale orders of magnitude larger than the quantum zero-point motion. Using a bang-bang control of the harmonic potential, including the possibility to invert it, the initial ground-state-cooled levitated nanoparticle coherently expands to large scales and then contracts to the initial state in a time-optimal way. We show that this fast loop protocol can be used to enhance force sensing as well as to dramatically boost the entangling rate of two weakly interacting nanoparticles. We parameterize the performance of the protocol, and therefore the macroscopic quantum regime that could be explored, as a function of displacement and frequency noise in the nanoparticle's center-of-mass motion. This noise analysis accounts for the sources of decoherence relevant to current experiments.

Related papers

• Squeezing below the ground state of motion of a continuously monitored levitating nanoparticle [0.0]
  Squeezing is a crucial resource for quantum information processing and quantum sensing. We analyze the performance of a scheme that embeds careful time-control of trapping potentials. The feasibility of our proposal, which is close to experimental state-of-the-art, makes it a valuable tool for quantum state engineering.
  arXiv  Detail & Related papers  (2024-03-27T17:34:50Z)
• Control of an environmental spin defect beyond the coherence limit of a central spin [79.16635054977068]
  We present a scalable approach to increase the size of electronic-spin registers. We experimentally realize this approach to demonstrate the detection and coherent control of an unknown electronic spin outside the coherence limit of a central NV. Our work paves the way for engineering larger quantum spin registers with the potential to advance nanoscale sensing, enable correlated noise spectroscopy for error correction, and facilitate the realization of spin-chain quantum wires for quantum communication.
  arXiv  Detail & Related papers  (2023-06-29T17:55:16Z)
• Macroscopic Quantum Superpositions via Dynamics in a Wide Double-Well Potential [0.0]
  We present an experimental proposal for the rapid preparation of the center of mass of a levitated particle in a macroscopic quantum state. This state is prepared by letting the particle evolve in a static double-well potential after a sudden switchoff of the harmonic trap. We highlight the possibility of using two particles, one evolving in each potential well, to mitigate the impact of collective sources of noise and decoherence.
  arXiv  Detail & Related papers  (2023-03-14T15:00:55Z)
• All-Optical Nuclear Quantum Sensing using Nitrogen-Vacancy Centers in Diamond [52.77024349608834]
  Microwave or radio-frequency driving poses a significant limitation for miniaturization, energy-efficiency and non-invasiveness of quantum sensors. We overcome this limitation by demonstrating a purely optical approach to coherent quantum sensing. Our results pave the way for highly compact quantum sensors to be employed for magnetometry or gyroscopy applications.
  arXiv  Detail & Related papers  (2022-12-14T08:34:11Z)
• Fast Quantum Interference of a Nanoparticle via Optical Potential Control [0.0]
  We introduce and theoretically analyze a scheme to prepare and detect non-Gaussian quantum states of an optically levitated particle. We show that this allows operating on short time- and lengthscales, which significantly reduces the demands on decoherence rates in such experiments.
  arXiv  Detail & Related papers  (2022-07-25T21:28:12Z)
• Tuneable Gaussian entanglement in levitated nanoparticle arrays [0.0]
  We propose a scheme to generate entanglement in the motional steady state of multiple levitated nanoparticles using coherent scattering to multiple cavity modes. Our proposal paves the way towards creating complex quantum states of multiple levitated nanoparticles for advanced quantum sensing protocols and many-body quantum simulations.
  arXiv  Detail & Related papers  (2022-06-15T08:19:36Z)
• Tuning long-range fermion-mediated interactions in cold-atom quantum simulators [68.8204255655161]
  Engineering long-range interactions in cold-atom quantum simulators can lead to exotic quantum many-body behavior. Here, we propose several tuning knobs, accessible in current experimental platforms, that allow to further control the range and shape of the mediated interactions.
  arXiv  Detail & Related papers  (2022-03-31T13:32:12Z)
• Controlled coherent dynamics of [VO(TPP)], a prototype molecular nuclear qudit with an electronic ancilla [50.002949299918136]
  We show that [VO(TPP)] (vanadyl tetraphenylporphyrinate) is a promising system suitable to implement quantum computation algorithms. It embeds an electronic spin 1/2 coupled through hyperfine interaction to a nuclear spin 7/2, both characterized by remarkable coherence.
  arXiv  Detail & Related papers  (2021-03-15T21:38:41Z)
• Deterministic single-atom source of quasi-superradiant $N$-photon pulses [62.997667081978825]
  Scheme operates with laser and cavity fields detuned from the atomic transition by much more than the excited-state hyperfine splitting. This enables reduction of the dynamics to that of a simple, cavity-damped Tavis-Cummings model with the collective spin determined by the total angular momentum of the ground hyperfine level.
  arXiv  Detail & Related papers  (2020-12-01T03:55:27Z)
• Quantum sensing with nanoparticles for gravimetry; when bigger is better [0.0]
  We describe experiments with optically levitated nanoparticles and their proposed utility for acceleration sensing. Unique to the levitated nanoparticles platform is the ability to implement long-lived quantum spatial superpositions for enhanced gravimetry. This follows a global trend in developing sensors, such as cold-atom interferometers, that exploit superposition or entanglement.
  arXiv  Detail & Related papers  (2020-05-29T16:02:24Z)
• Zitterbewegung and Klein-tunneling phenomena for transient quantum waves [77.34726150561087]
  We show that the Zitterbewegung effect manifests itself as a series of quantum beats of the particle density in the long-time limit. We also find a time-domain where the particle density of the point source is governed by the propagation of a main wavefront. The relative positions of these wavefronts are used to investigate the time-delay of quantum waves in the Klein-tunneling regime.
  arXiv  Detail & Related papers  (2020-03-09T21:27:02Z)

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.