Fast mixed-species quantum logic gates for trapped-ion quantum networks

• URL: http://arxiv.org/abs/2412.07185v1
• Date: Tue, 10 Dec 2024 04:47:53 GMT
• Title: Fast mixed-species quantum logic gates for trapped-ion quantum networks
• Authors: Zain Mehdi, Varun D. Vaidya, Isabelle Savill-Brown, Phoebe Grosser, Alexander K. Ratcliffe, Haonan Liu, Simon A. Haine, Joseph J. Hope, C. Ricardo Viteri,
• Abstract summary: We propose an approach to high-speed mixed-speciesangling operations in trapped-ion quantum computers. We develop the theory and machine-design of pulse sequences that realise MHz-speed fast gates' between a range of mixed-isotope and mixed-species ion pairings. We demonstrate that the mixed-species fast gate mechanism enables the protection of ion-photon entanglement against rapid spin dephasing of matter-photon interfaces.
• Score: 34.26719239756968
• License:
• Abstract: Quantum logic operations between physically distinct qubits is an essential aspect of large-scale quantum information processing. We propose an approach to high-speed mixed-species entangling operations in trapped-ion quantum computers, based on mechanical excitation of spin-dependent ion motion by ultrafast pulsed lasers. We develop the theory and machine-design of pulse sequences that realise MHz-speed `fast gates' between a range of mixed-isotope and mixed-species ion pairings with experimentally-realistic laser controls. We demonstrate the robustness of the gate mechanism against expected experimental errors, and identify errors in ultrafast single-qubit control as the primary technical limitation. We demonstrate that the mixed-species fast gate mechanism enables the protection of ion-photon entanglement against rapid spin dephasing of matter-photon interfaces, paving the path for high-fidelity and high-speed quantum networking in trapped-ion architectures.

Related papers

• Hyperbolic Quantum Processor [0.0]
  We show that long-range qubit entanglement can be achieved when qubit interactions are mediated by optical polariton waves in a hyperbolic material. The resulting quantum gate fidelity that exceeds 99%, can be achieved with the use of qubits based on well known deep donors in silicon.
  arXiv  Detail & Related papers  (2024-12-18T17:48:21Z)
• Optical single-shot readout of spin qubits in silicon [41.94295877935867]
  silicon nanofabrication offers unique advantages for integration and up-scaling. Small spin-qubit registers have exceeded error-correction thresholds, their connection to large quantum computers is an outstanding challenge. We implement such an efficient spin-photon interface based on erbium dopants in a nanophotonic resonator.
  arXiv  Detail & Related papers  (2024-05-08T18:30:21Z)
• Pulse-controlled qubit in semiconductor double quantum dots [57.916342809977785]
  We present a numerically-optimized multipulse framework for the quantum control of a single-electron charge qubit. A novel control scheme manipulates the qubit adiabatically, while also retaining high speed and ability to perform a general single-qubit rotation.
  arXiv  Detail & Related papers  (2023-03-08T19:00:02Z)
• Fast Ion Gates Outside the Lamb-Dicke Regime by Robust Quantum Optimal Control [16.769083043152627]
  We present a quantum optimal control framework for implementing fast entangling gates on ion-trap quantum processors. The framework leverages tailored laser pulses to drive the multiple vibrational sidebands of the ions to create phonon-mediated entangling gates. Our approach represents a step in speeding up quantum gates to achieve larger quantum circuits for quantum computation and simulation.
  arXiv  Detail & Related papers  (2022-09-20T11:14:00Z)
• Simulation of interaction-induced chiral topological dynamics on a digital quantum computer [3.205614282399206]
  Chiral edge states are sought-after as paradigmatic topological states relevant to quantum information processing and electron transport. We demonstrate chiral topological propagation that is induced by suitably designed interactions, instead of flux or spin-orbit coupling. By taking advantage of the quantum nature of the platform, we circumvented difficulties from the limited qubit number and gate fidelity in present-day noisy intermediate-scale quantum (NISQ)-era quantum computers.
  arXiv  Detail & Related papers  (2022-07-28T18:00:29Z)
• Tunable photon-mediated interactions between spin-1 systems [68.8204255655161]
  We show how to harness multi-level emitters with several optical transitions to engineer photon-mediated interactions between effective spin-1 systems. Our results expand the quantum simulation toolbox available in cavity QED and quantum nanophotonic setups.
  arXiv  Detail & Related papers  (2022-06-03T14:52:34Z)
• Generalized hyper-Ramsey-Bord\'e matter-wave interferometry: quantum engineering of robust atomic sensors with composite pulses [0.0]
  A new class of atomic interferences using ultra-narrow optical transitions are pushing quantum engineering control to a very high level of precision. We propose a new quantum engineering approach to Ramsey-Bord'e interferometry introducing multiple composite laser pulses with tailored pulse duration, Rabi field amplitude, frequency detuning and laser phase-step.
  arXiv  Detail & Related papers  (2022-02-13T12:30:07Z)
• Entangling Quantum Generative Adversarial Networks [53.25397072813582]
  We propose a new type of architecture for quantum generative adversarial networks (entangling quantum GAN, EQ-GAN) We show that EQ-GAN has additional robustness against coherent errors and demonstrate the effectiveness of EQ-GAN experimentally in a Google Sycamore superconducting quantum processor.
  arXiv  Detail & Related papers  (2021-04-30T20:38:41Z)
• 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)
• Information Scrambling in Computationally Complex Quantum Circuits [56.22772134614514]
  We experimentally investigate the dynamics of quantum scrambling on a 53-qubit quantum processor. We show that while operator spreading is captured by an efficient classical model, operator entanglement requires exponentially scaled computational resources to simulate.
  arXiv  Detail & Related papers  (2021-01-21T22:18:49Z)

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.