Quantum Tomography of Suspended Carbon Nanotubes

• URL: http://arxiv.org/abs/2509.01858v2
• Date: Tue, 23 Sep 2025 01:51:58 GMT
• Title: Quantum Tomography of Suspended Carbon Nanotubes
• Authors: Jialiang Chang, Nicholas Pietrzak, Cristian Staii,
• Abstract summary: Calibrated impulses from a nearby atomic force microscope (AFM) tip serve a dual role.<n>They implement mechanical pi/2 rotations for Ramsey interferometry and realize phase-space displacements for Wigner function tomography.<n>We derive explicit control pulse sequences and a master-equation description that map measured signals onto the energy-relaxation and phase-coherence times.
• Score: 0.0
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Abstract: We present an all-mechanical protocol for coherent control and full quantum-state reconstruction of the fundamental flexural mode of a suspended carbon nanotube (CNT). Calibrated impulses from a nearby atomic force microscope (AFM) tip serve a dual role: they implement mechanical pi/2 rotations for Ramsey interferometry and realize phase-space displacements for Wigner function tomography via displaced-parity sampling. The same actuator thus unifies control and tomography while avoiding optical heating and eliminating on-chip microwave drive lines at the resonator. We derive explicit control pulse sequences and a master-equation description that map measured signals onto the energy-relaxation and phase-coherence times, as well as onto parity-based quantum signatures, including negative regions of the Wigner function. The approach is compatible with several readout modalities: direct AFM deflection, dispersive coupling to a Cooper-pair box, and dispersive microwave cavity probing. Together, these techniques provide complete access to populations, coherence, and parity within a single device architecture. This minimal scheme provides a practical route to all-mechanical quantum control and state-resolved characterization of decoherence in mesoscopic mechanical systems.

Related papers

• Multi-Photon Quantum Rabi Models with Center-of-Mass Motion [45.73541813564926]
  We introduce a rigorous, second-quantized framework for describing multi-$Lambda$-atoms in a cavity.<n>A key feature of our approach is the systematic application of a Hamiltonian averaging theory to the atomic field operators.<n>A significant finding is the emergence of a particle-particle interaction mediated by ancillary states.
  arXiv  Detail & Related papers  (2025-07-07T09:50:48Z)
• Programmable Synthetic Magnetism and Chiral Edge States in Nano-Optomechanical Quantum Hall Networks [0.0]
  We experimentally demonstrate the emergence of quantum-Hall-like chiral edge states in optomechanical resonator networks.<n>This work unlocks new ways of controlling topological phononic phases at the nanoscale with applications in noise management and information processing.
  arXiv  Detail & Related papers  (2025-01-31T04:32:07Z)
• Microwave-optics entanglement via coupled opto- and magnomechanical microspheres [6.9536044259987575]
  Microwave-optics entanglement plays a crucial role in building hybrid quantum networks.<n>We present a new mechanism to prepare microwave-optics entanglement based on a hybrid system of two coupled opto- and magnomechanical microspheres.
  arXiv  Detail & Related papers  (2024-08-07T14:15:55Z)
• Simulating polaritonic ground states on noisy quantum devices [0.0]
  We introduce a general framework for simulating electron-photon coupled systems on small, noisy quantum devices. To achieve chemical accuracy, we exploit various symmetries in qubit reduction methods. We measure two properties: ground-state energy, fundamentally relevant to chemical reactivity, and photon number.
  arXiv  Detail & Related papers  (2023-10-03T14:45:54Z)
• Engineering Entangled Coherent States of Magnons and Phonons via a Transmon Qubit [0.0]
  We propose a scheme for generating and controlling entangled coherent states (ECS) of magnons. The proposed hybrid circuit architecture comprises a superconducting transmon qubit coupled to a pair of magnonic Yttrium Iron Garnet (YIG) spherical resonators. We numerically demonstrate a protocol for the preparation of magnonic and mechanical Bell states with high fidelity.
  arXiv  Detail & Related papers  (2023-09-28T15:20:36Z)
• 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)
• Topological lattices realized in superconducting circuit optomechanics [0.0]
  We show that it is possible to directly measure the mode functions of hybridized modes without using any local probe. Such optomechanical lattices offer an avenue to explore collective, quantum many-body, and quench dynamics.
  arXiv  Detail & Related papers  (2021-11-17T14:13:52Z)
• A low-loss ferrite circulator as a tunable chiral quantum system [108.66477491099887]
  We demonstrate a low-loss waveguide circulator constructed with single-crystalline yttrium iron garnet (YIG) in a 3D cavity. We show the coherent coupling of its chiral internal modes with integrated superconducting niobium cavities. We also probe experimentally the effective non-Hermitian dynamics of this system and its effective non-reciprocal eigenmodes.
  arXiv  Detail & Related papers  (2021-06-21T17:34:02Z)
• Coherent control in the ground and optically excited state of an ensemble of erbium dopants [55.41644538483948]
  Ensembles of erbium dopants can realize quantum memories and frequency converters. In this work, we use a split-ring microwave resonator to demonstrate such control in both the ground and optically excited state.
  arXiv  Detail & Related papers  (2021-05-18T13:03:38Z)
• 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)
• Waveguide quantum optomechanics: parity-time phase transitions in ultrastrong coupling regime [125.99533416395765]
  We show that the simplest set-up of two qubits, harmonically trapped over an optical waveguide, enables the ultrastrong coupling regime of the quantum optomechanical interaction. The combination of the inherent open nature of the system and the strong optomechanical coupling leads to emerging parity-time (PT) symmetry. The $mathcalPT$ phase transition drives long-living subradiant states, observable in the state-of-the-art waveguide QED setups.
  arXiv  Detail & Related papers  (2020-07-04T11:02:20Z)

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.