Full Bell-basis measurement of an atom-photon 2-qubit state and its application for quantum networks

Abstract

The efficiency of a Bell-state measurement on photon pairs is bound to 50\,\% due to the number of Bell states that can be distinguished using linear optics. Here we present the implementation of a protocol that allows us to distinguish all four Bell states by the use of a single-ion quantum memory and heralded absorption as state-selective measurement. The protocol is implemented in two steps. First we demonstrate the state-preserving mapping of a photonic qubit onto the quantum memory, verified by the preservation of entanglement in the process. Then we demonstrate the full Bell state projection between a memory qubit and an incoming photonic qubit, by applying it for atom-to-photon quantum state teleportation.

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References in corpus (7)

• Experimental quantum teleportation
• Entangling single atoms over 33 km telecom fibre
• Complete and Deterministic discrimination of polarization Bell state assisted by momentum entanglement
• A Quantum Network Node with Crossed Optical Fibre Cavities
• Bell-state measurement exceeding 50% success probability with linear optics
• A nondestructive Bell-state measurement on two distant atomic qubits
• Telecom Quantum Photonic Interface for a ${}^{40}$Ca${}^{+}$ Single-Ion Quantum Memory

Cited by in corpus (2)

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