Individual control and readout of qubits in a sub-diffraction volume
Abstract
Medium-scale ensembles of coupled qubits offer a platform for near-term quantum technologies as well as studies of many-body physics. A central challenge for coherent control of such systems is the ability to measure individual quantum states without disturbing nearby qubits. Here, we demonstrate the measurement of individual qubit states in a sub-diffraction cluster by selectively exciting spectrally distinguishable nitrogen vacancy centers. We perform super-resolution localization of single centers with nanometer spatial resolution, as well as individual control and readout of spin populations. These measurements indicate a readout-induced crosstalk on non-addressed qubits below 4 × 10−2. This approach opens the door to high-speed control and measurement of qubit registers in mesoscopic spin clusters, with applications ranging from entanglement-enhanced sensors to error-corrected qubit registers to multiplexed quantum repeater nodes.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- May 15, 2019
- Source ID
- 10.1038/s41534-019-0154-y
Entities
People
- Dirk Englund
- Eric Bersin
- Matthew E. Trusheim
- Michael P Walsh
- Sara Mouradian
- Tim Schröder
Organizations
- Air Force Office of Scientific Research
- Division of Materials Research
- Division of Physics
- National Aeronautics and Space Administration
- Oak Ridge Institute for Science and Education
- Office of Emerging Frontiers and Multidisciplinary Activities
- United States Army Research Laboratory