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19 April 2024 |
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High fidelity transfer and storage of photon states in a single nuclear spin | | Sen Yang
; Ya Wang
; D. D. Bhaktavatsala Rao
; Thai Hien Tran
; S. Ali Momenzadeh
; M. Markham
; D. J. Twitchen
; Ping Wang
; Wen Yang
; Rainer Stoehr
; Philipp Neumann
; Hideo Kosaka
; Joerg Wrachtrup
; | | Date: |
16 Nov 2015 | | Abstract: | Building a quantum repeater network for long distance quantum communication
requires photons and quantum registers that comprise qubits for interaction
with light, good memory capabilities and processing qubits for storage and
manipulation of photons. Here we demonstrate a key step, the coherent transfer
of a photon in a single solid-state nuclear spin qubit with an average fidelity
of 98% and storage over 10 seconds. The storage process is achieved by
coherently transferring a photon to an entangled electron-nuclear spin state of
a nitrogen vacancy centre in diamond, confirmed by heralding through high
fidelity single-shot readout of the electronic spin states. Stored photon
states are robust against repetitive optical writing operations, required for
repeater nodes. The photon-electron spin interface and the nuclear spin memory
demonstrated here constitutes a major step towards practical quantum networks,
and surprisingly also paves the way towards a novel entangled photon source for
photonic quantum computing. | | Source: | arXiv, 1511.4939 | | Services: | Forum | Review | PDF | Favorites | |
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