Fast design and scaling of multi-qubit gates in large-scale trapped-ion quantum computers

• URL: http://arxiv.org/abs/2307.09566v1
• Date: Fri, 14 Jul 2023 21:01:14 GMT
• Title: Fast design and scaling of multi-qubit gates in large-scale trapped-ion quantum computers
• Authors: Yotam Shapira, Lee Peleg, David Schwerdt, Jonathan Nemirovsky, Nitzan Akerman, Ady Stern, Amit Ben Kish, Roee Ozeri
• Abstract summary: Quantum computers based on crystals of trapped ions are a prominent technology for quantum computation. Here we introduce a method that vastly reduces the computational challenge, effectively allowing for the design of fast and programmable entanglement gates. Our method delineates a path towards scaling up quantum computers based on ion-crystals with 100s of qubits.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Quantum computers based on crystals of electrically trapped ions are a prominent technology for quantum computation. A unique feature of trapped ions is their long-range Coulomb interactions, which come about as an ability to naturally realize large-scale multi-qubit entanglement gates. However, scaling up the number of qubits in these systems, while retaining high-fidelity and high-speed operations is challenging. Specifically, designing multi-qubit entanglement gates in long ion crystals of 100s of ions involves an NP-hard optimization problem, rendering scaling up the number of qubits a conceptual challenge as well. Here we introduce a method that vastly reduces the computational challenge, effectively allowing for a polynomial-time design of fast and programmable entanglement gates, acting on the entire ion crystal. We use this method to investigate the utility, scaling and requirements of such multi-qubit gates. Our method delineates a path towards scaling up quantum computers based on ion-crystals with 100s of qubits.

Related papers

• Scalable architecture for trapped-ion quantum computing using RF traps and dynamic optical potentials [0.0]
  In principle there is no fundamental limit to the number of ion-based qubits that can be confined in a single 1D register. Here we propose a holistic, scalable architecture for quantum computing with large ion-crystals. We show that these cells behave as nearly independent quantum registers, allowing for parallel entangling gates on all cells.
  arXiv  Detail & Related papers  (2023-11-02T12:06:49Z)
• Quantum process tomography of continuous-variable gates using coherent states [49.299443295581064]
  We demonstrate the use of coherent-state quantum process tomography (csQPT) for a bosonic-mode superconducting circuit. We show results for this method by characterizing a logical quantum gate constructed using displacement and SNAP operations on an encoded qubit.
  arXiv  Detail & Related papers  (2023-03-02T18:08:08Z)
• 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)
• An Algebraic Quantum Circuit Compression Algorithm for Hamiltonian Simulation [55.41644538483948]
  Current generation noisy intermediate-scale quantum (NISQ) computers are severely limited in chip size and error rates. We derive localized circuit transformations to efficiently compress quantum circuits for simulation of certain spin Hamiltonians known as free fermions. The proposed numerical circuit compression algorithm behaves backward stable and scales cubically in the number of spins enabling circuit synthesis beyond $mathcalO(103)$ spins.
  arXiv  Detail & Related papers  (2021-08-06T19:38:03Z)
• Hardware-Efficient, Fault-Tolerant Quantum Computation with Rydberg Atoms [55.41644538483948]
  We provide the first complete characterization of sources of error in a neutral-atom quantum computer. We develop a novel and distinctly efficient method to address the most important errors associated with the decay of atomic qubits to states outside of the computational subspace. Our protocols can be implemented in the near-term using state-of-the-art neutral atom platforms with qubits encoded in both alkali and alkaline-earth atoms.
  arXiv  Detail & Related papers  (2021-05-27T23:29:53Z)
• Cold ion beam in a storage ring as a platform for large-scale quantum computers and simulators: challenges and directions for research and development [0.0]
  Large-scale storage-ring-type ion-trap system capable of storing, cooling, and controlling a large number of ions as a platform for scalable quantum computing (QC) and quantum simulations (QS) In this paper we consider a large leap forward in terms of the number of qubits, from fewer than 100 available in state-of-the-art linear ion-trap devices today to an order of 105 crystallized ions in the storage-ring setup.
  arXiv  Detail & Related papers  (2021-01-12T00:52:33Z)
• Electronic structure with direct diagonalization on a D-Wave quantum annealer [62.997667081978825]
  This work implements the general Quantum Annealer Eigensolver (QAE) algorithm to solve the molecular electronic Hamiltonian eigenvalue-eigenvector problem on a D-Wave 2000Q quantum annealer. We demonstrate the use of D-Wave hardware for obtaining ground and electronically excited states across a variety of small molecular systems.
  arXiv  Detail & Related papers  (2020-09-02T22:46:47Z)
• Boundaries of quantum supremacy via random circuit sampling [69.16452769334367]
  Google's recent quantum supremacy experiment heralded a transition point where quantum computing performed a computational task, random circuit sampling. We examine the constraints of the observed quantum runtime advantage in a larger number of qubits and gates.
  arXiv  Detail & Related papers  (2020-05-05T20:11:53Z)
• A two-dimensional architecture for fast large-scale trapped-ion quantum computing [0.0]
  We propose an architecture for large-scale quantum computing with a two-dimensional array of atomic ions trapped at such large distance. Using gate operations far outside of the Lamb-Dicke region, we show that fast and robust entangling gates can be realized in any large ion arrays.
  arXiv  Detail & Related papers  (2020-04-24T09:17:40Z)
• Demonstration of the trapped-ion quantum-CCD computer architecture [0.0]
  We report on the integration of all necessary ingredients of the QCCD architecture into a programmable trapped-ion quantum computer. Using four and six qubit circuits, the system level performance of the processor is endowed by the fidelity of a teleported CNOT gate. Our work shows that the QCCD architecture built around these qubits will provide high performance quantum computers.
  arXiv  Detail & Related papers  (2020-03-03T01:57:20Z)
• Integrated optical multi-ion quantum logic [4.771545115836015]
  Planar-fabricated optics integrated within ion trap devices can make such systems simultaneously more robust and parallelizable. We use scalable optics co-fabricated with a surface-electrode ion trap to achieve high-fidelity multi-ion quantum logic gates. Similar devices may also find applications in neutral atom and ion-based quantum-sensing and timekeeping.
  arXiv  Detail & Related papers  (2020-02-06T13:52:01Z)

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.