CNOT and Bell-state analysis in the weak-coupling cavity QED regime
Cristian Bonato, Florian Haupt, Sumant S. R. Oemrawsingh, Jan Gudat,, Dapend Ding, Martin P. van Exter, Dirk Bouwmeester
TL;DR
This paper proposes a quantum interface using weak-coupling cavity QED to perform CNOT gates, entanglement, and Bell-state analysis with current technology.
Contribution
It introduces a novel spin-photon interface in the weak-coupling regime enabling quantum information processing tasks.
Findings
Feasible with current technology
Can construct CNOT gates and Bell-state analyzers
Operates via spin selective photon reflection
Abstract
We propose an interface between the spin of a photon and the spin of an electron confined in a quantum dot embedded in a microcavity operating in the weak coupling regime. This interface, based on spin selective photon reflection from the cavity, can be used to construct a CNOT gate, a multi-photon entangler and a photonic Bell-state analyzer. Finally, we analyze experimental feasibility, concluding that the schemes can be implemented with current technology.
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