Photon Bell-State Analysis Based on Semiconductor-Superconductor Structures
Evyatar Sabag, Shlomi Bouscher, Raja Marjieh, and Alex Hayat
TL;DR
This paper introduces a novel scheme for complete Bell-state analysis using two-photon absorption in a superconducting semiconductor device, enabling high detection purity for quantum information applications.
Contribution
It presents a new method leveraging superconductivity-enhanced two-photon absorption for efficient Bell-state analysis, which is a significant advancement over existing techniques.
Findings
High detection purity of the desired Bell state
Negligible false detection probability
Potential for practical quantum information implementations
Abstract
We propose a compact and highly-efficient scheme for complete Bell-state analysis using two-photon absorption in a superconducting proximity region of a semiconductor avalanche photodiode. One-photon transitions to the superconducting Cooper-pair based condensate in the conduction band are forbidden, whereas two-photon transitions are allowed and are strongly enhanced by superconductivity. This Cooper-pair based two-photon absorption results in a strong detection preference of a specified entangled state. Our analysis shows high detection purity of the desired Bell state with negligible false detection probability. The theoretically-demonstrated concept can pave the way towards practical realizations of advanced quantum information schemes.
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