Efficient Bell state analyzer for time-bin qubits with fast-recovery WSi superconducting single photon detectors
Valivarthi, Raju · Lucio-Martinez, Itzel · Rubenok, Allison · Chan, Philip · Marsili, Francesco · Verma, Varun B. · Shaw, Matthew D. · Stern, J. A. · Slater, Joshua A. · Oblak, Daniel · Nam, Sae Woo · Tittel, Wolfgang
Original · EN
We experimentally demonstrate a high-efficiency Bell state measurement for time-bin qubits that employs two superconducting nanowire single-photon detectors with short dead-times, allowing projections onto two Bell states, |Psi>- and |Psi+>. Compared to previous implementations for time-bin qubits, this yields an increase in the efficiency of Bell state analysis by a factor of thirty.
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