Motional squeezing for trapped ion transport and separation

• URL: http://arxiv.org/abs/2103.05832v2
• Date: Mon, 3 May 2021 22:32:37 GMT
• Title: Motional squeezing for trapped ion transport and separation
• Authors: R. T. Sutherland, S. C. Burd, D. H. Slichter, S. B. Libby, D. Leibfried
• Abstract summary: Transport, separation, and merging of trapped ion crystals are essential operations for most large-scale quantum computing architectures. We develop a theoretical framework that describes the dynamics of ions in time-varying potentials with a motional squeeze operator. We show that motional squeezing can prepare an ion wave packet to enable transfer from the ground state of one trapping potential to another.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Transport, separation, and merging of trapped ion crystals are essential operations for most large-scale quantum computing architectures. In this work, we develop a theoretical framework that describes the dynamics of ions in time-varying potentials with a motional squeeze operator, followed by a motional displacement operator. Using this framework, we develop a new, general protocol for trapped ion transport, separation, and merging. We show that motional squeezing can prepare an ion wave packet to enable transfer from the ground state of one trapping potential to another. The framework and protocol are applicable if the potential is harmonic over the extent of the ion wave packets at all times. As illustrations, we discuss two specific operations: changing the strength of the confining potential for a single ion, and separating same-species ions with their mutual Coulomb force. Both of these operations are, ideally, free of residual motional excitation.

Related papers

• Fast Ground State to Ground State Separation of Small Ion Crystals [0.0]
  Rapid separation of linear crystals of trapped ions into different subsets is critical for realizing trapped ion quantum computing architectures. We introduce a general theoretical framework that can be used to describe the separation of same-species and mixed-species crystals into smaller subsets.
  arXiv  Detail & Related papers  (2024-06-25T17:36:19Z)
• Measurement-Induced Transmon Ionization [69.65384453064829]
  We develop a comprehensive framework which provides a physical picture of the origin of transmon ionization. This framework identifies the multiphoton resonances responsible for transmon ionization. It also allows one to efficiently compute numerical estimates of the photon number threshold for ionization.
  arXiv  Detail & Related papers  (2024-02-09T18:46:50Z)
• A Novel Quasiparticle Method for Solid State Ion Transport [1.4918456025103544]
  The quasiparticle method has achieved a great success in solid state electronics and crystal lattice vibration. A general recipe is put forward to map the classical solid state ion system together with the short-range ion-ion repulsion to a quasiparticle quantum system. The derived ionic eigen-states and transport can naturally incorporate the concerted behavior.
  arXiv  Detail & Related papers  (2023-10-22T20:34:13Z)
• Thermal masses and trapped-ion quantum spin models: a self-consistent approach to Yukawa-type interactions in the $λ\!φ^4$ model [44.99833362998488]
  A quantum simulation of magnetism in trapped-ion systems makes use of the crystal vibrations to mediate pairwise interactions between spins. These interactions can be accounted for by a long-wavelength relativistic theory, where the phonons are described by a coarse-grained Klein-Gordon field. We show that thermal effects, which can be controlled by laser cooling, can unveil this flow through the appearance of thermal masses in interacting QFTs.
  arXiv  Detail & Related papers  (2023-05-10T12:59:07Z)
• Trapped Ions as an Architecture for Quantum Computing [110.83289076967895]
  We describe one of the most promising platforms for the construction of a universal quantum computer. We discuss from the physics involved in trapping ions in electromagnetic potentials to the Hamiltonian engineering needed to generate a universal set of logic gates.
  arXiv  Detail & Related papers  (2022-07-23T22:58:50Z)
• Pulsed multireservoir engineering for a trapped ion with applications to state synthesis and quantum Otto cycles [68.8204255655161]
  Reservoir engineering is a remarkable task that takes dissipation and decoherence as tools rather than impediments. We develop a collisional model to implement reservoir engineering for the one-dimensional harmonic motion of a trapped ion. Having multiple internal levels, we show that multiple reservoirs can be engineered, allowing for more efficient synthesis of well-known non-classical states of motion.
  arXiv  Detail & Related papers  (2021-11-26T08:32:39Z)
• Transport-enabled entangling gate for trapped ions [0.0]
  We implement a two-qubit entangling Molmer-Sorensen interaction by transporting two co-trapped $40mathrmCa+$ ions through a stationary, bichromatic optical beam. We describe a procedure for achieving a constant Doppler shift during the transport which uses fine temporal adjustment of the moving confinement potential.
  arXiv  Detail & Related papers  (2021-09-08T18:25:01Z)
• Interplay between transport and quantum coherences in free fermionic systems [58.720142291102135]
  We study the quench dynamics in free fermionic systems. In particular, we identify a function, that we dub emphtransition map, which takes the value of the stationary current as input and gives the value of correlation as output.
  arXiv  Detail & Related papers  (2021-03-24T17:47:53Z)
• Algorithmic Ground-state Cooling of Weakly-Coupled Oscillators using Quantum Logic [52.77024349608834]
  We introduce a novel algorithmic cooling protocol for transferring phonons from poorly- to efficiently-cooled modes. We demonstrate it experimentally by simultaneously bringing two motional modes of a Be$+$-Ar$13+$ mixed Coulomb crystal close to their zero-point energies. We reach the lowest temperature reported for a highly charged ion, with a residual temperature of only $Tlesssim200mathrmmu K$ in each of the two modes.
  arXiv  Detail & Related papers  (2021-02-24T17:46:15Z)
• Long-range multi-body interactions and three-body anti-blockade in a trapped Rydberg ion chain [6.431584269935996]
  Trapped Rydberg ions represent a flexible platform for quantum simulation and information processing. We show that the coupling between Rydberg pair interactions and collective motional modes gives rise to effective long-range multi-body interactions. Our study shows that trapped Rydberg ions offer new opportunities to study exotic many-body quantum dynamics.
  arXiv  Detail & Related papers  (2020-05-12T12:41:10Z)
• Trapped Rydberg ions: a new platform for quantum information processing [27.84400682210533]
  Trapped Rydberg ions feature several important properties, unique in their combination. High fidelity state preparation of both internal and motional states of the ions has been demonstrated. Strong dipolar interactions can be realised between ions in Rydberg states.
  arXiv  Detail & Related papers  (2020-03-19T16:37:46Z)

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.