Optical Readout of Spin Qubits in Silicon
Author Information
Author(s): Gritsch Andreas, Ulanowski Alexander, Pforr Jakob, Reiserer Andreas
Primary Institution: Technical University of Munich
Hypothesis
Can optical interfaces improve the efficiency and scalability of spin qubits in silicon?
Conclusion
The study demonstrates an efficient optical single-shot readout of a spin qubit in silicon, paving the way for scalable quantum information processing.
Supporting Evidence
- Erbium dopants in silicon can emit coherent photons in the minimal-loss band of optical fibers.
- The demonstrated hardware platform offers unique promise for distributed quantum information processing.
- Optical fields can be confined to the nanoscale, eliminating cross-talk between closely-spaced components.
- Fast and efficient detectors for optical fields can be integrated on silicon chips.
Takeaway
The researchers found a way to read the state of tiny quantum bits using light, which could help make powerful quantum computers.
Methodology
The study involved integrating erbium dopants into a silicon photonic crystal resonator to achieve optical initialization and readout of a single spin.
Limitations
The optical transitions of erbium are slower compared to other emitters, which may limit operation rates.
Digital Object Identifier (DOI)
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