Freiburg 2024 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
Q: Fachverband Quantenoptik und Photonik
Q 60: Quantum Computing and Simulation I
Q 60.1: Talk
Friday, March 15, 2024, 11:00–11:15, Aula
A quantum perceptron gate and a classical Toffoli gate with microwave-driven trapped ions — •Patrick H. Huber1, Patrick Barthel1, Sougato Bose3, Juan José García-Ripoll4, Johann Haber1, Yasser Omar2, Sagar Pratapsi2, Erik Torrontegui4, and Christof Wunderlich1 — 1University of Siegen, Germany — 2Universidade de Lisboa, Portugal — 3University College London, UK — 4Instituto de Física Fundamental IFF-CSIC, Madrid, Spain
Direct implementation of multi-qubit gates with three or more qubits circumvents decomposition into two-qubit operations, effectively reducing the required depth of quantum circuits. Using the inherent all-to-all coupling in a trapped ion quantum computer, we experimentally realize classical Toffoli and perceptron gates with three microwave-driven hyperfine qubits using 171Yb+ ions. The classical Toffoli gate is used to efficiently implement a half-adder. The perceptron gate, when nested with other perceptrons, can be used as universal approximator. Both, the perceptron and Toffoli gates are implemented by a continuous microwave driving field, while the qubits’ coherence is protected by pulsed dynamical decoupling. We report the implementation of a two-layer neural network using successive perceptron gates. Here the 171Yb+ ions are stored in a linear Paul trap exposed to a permanent magnetic field gradient.
Keywords: Toffoli; Perceptron; Microwave