Repetitive readout of a single electronic spin via quantum logic with nuclear spin ancillae. uri icon

abstract

  • Robust measurement of single quantum bits plays a key role in the realization of quantum computation and communication as well as in quantum metrology and sensing. We have implemented a method for the improved readout of single electronic spin qubits in solid-state systems. The method makes use of quantum logic operations on a system consisting of a single electronic spin and several proximal nuclear spin ancillae in order to repetitively readout the state of the electronic spin. Using coherent manipulation of a single nitrogen vacancy center in room-temperature diamond, full quantum control of an electronic-nuclear system consisting of up to three spins was achieved. We took advantage of a single nuclear-spin memory in order to obtain a 10-fold enhancement in the signal amplitude of the electronic spin readout. We also present a two-level, concatenated procedure to improve the readout by use of a pair of nuclear spin ancillae, an important step toward the realization of robust quantum information processors using electronic- and nuclear-spin qubits. Our technique can be used to improve the sensitivity and speed of spin-based nanoscale diamond magnetometers.

published proceedings

  • Science

altmetric score

  • 28

author list (cited authors)

  • Jiang, L., Hodges, J. S., Maze, J. R., Maurer, P., Taylor, J. M., Cory, D. G., ... Lukin, M. D.

citation count

  • 281

complete list of authors

  • Jiang, L||Hodges, JS||Maze, JR||Maurer, P||Taylor, JM||Cory, DG||Hemmer, PR||Walsworth, RL||Yacoby, A||Zibrov, AS||Lukin, MD

publication date

  • October 2009