Todaro, S.
, Verma, V.
, McCormick, K.
, Allcock, D.
, Mirin, R.
, Wineland, D.
, Nam, S.
, Wilson, A.
, Leibfried, D.
and Slichter, D.
(2021),
State Readout of a Trapped Ion Qubit Using a Trap-integrated Superconducting Photon Detector, Physical Review Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=929700
(Accessed April 26, 2024)
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
State Readout of a Trapped Ion Qubit Using a Trap-integrated Superconducting Photon Detector
Published
Author(s)
, , , , , , , , ,
Abstract
We detect fluorescence photons emitted by a single $^9$Be$^+$ ion confined in a surface- electrode rf ion trap, using a superconducting nanowire single photon detector integrated directly into the trap. We achieve a qubit readout fidelity of 99.91(1) % with an average readout duration of 46 $\mu$s, limited by the polarization impurity of the readout laser beam and off-resonant optical pumping into the fluorescing state. We use the ion fluorescence to perform an absolute calibration of the detector quantum efficiency and characterize its dependence on incidence angle and polarization.Citation
Physical Review Letters
Pub Type
Journals
Download Paper
Keywords
Superconducting photon detector, single photon detector, ion trap, quantum measurement, quantum computing
Citation
Created January 6, 2021, Updated April 23, 2021