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Experimental perfect state transfer of an entangled photonic qubit.

Chapman RJ, Santandrea M, Huang Z, Corrielli G, Crespi A, Yung MH, Osellame R, Peruzzo A - Nat Commun (2016)

Bottom Line: On a single device we perform three routing procedures on entangled states, preserving the encoded quantum state with an average fidelity of 97.1%, measuring in the coincidence basis.Our protocol extends the regular perfect state transfer by maintaining quantum information encoded in the polarization state of the photonic qubit.Our results demonstrate the key principle of perfect state transfer, opening a route towards data transfer for quantum computing systems.

View Article: PubMed Central - PubMed

Affiliation: Quantum Photonics Laboratory, School of Engineering, RMIT University, Melbourne, Victoria 3000, Australia.

ABSTRACT
The transfer of data is a fundamental task in information systems. Microprocessors contain dedicated data buses that transmit bits across different locations and implement sophisticated routing protocols. Transferring quantum information with high fidelity is a challenging task, due to the intrinsic fragility of quantum states. Here we report on the implementation of the perfect state transfer protocol applied to a photonic qubit entangled with another qubit at a different location. On a single device we perform three routing procedures on entangled states, preserving the encoded quantum state with an average fidelity of 97.1%, measuring in the coincidence basis. Our protocol extends the regular perfect state transfer by maintaining quantum information encoded in the polarization state of the photonic qubit. Our results demonstrate the key principle of perfect state transfer, opening a route towards data transfer for quantum computing systems.

No MeSH data available.


Perfect state transfer of entangled states with varying purity.Photon 1 of the state  is injected into waveguide 1 of the PST array. A delay is applied to the vertical component to control the purity of the state. (a) Relative delay of 0 μm, (b) 50 μm, (c) 100 μm and (d) 150 μm. Results have had the small imaginary components removed for brevity.
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f5: Perfect state transfer of entangled states with varying purity.Photon 1 of the state is injected into waveguide 1 of the PST array. A delay is applied to the vertical component to control the purity of the state. (a) Relative delay of 0 μm, (b) 50 μm, (c) 100 μm and (d) 150 μm. Results have had the small imaginary components removed for brevity.

Mentions: where τ is controlled by altering the path length of the vertical component of the state. H(V) is the horizontal (vertical) component of the photon. Figure 5 presents density matrices for PST from waveguide 1 to waveguide 11 applied to entangled states of varying purity. The injected states are recovered with an average fidelity of 0.971±0.019 and an average similarity of 0.978±0.019 (see Supplementary Table 4 for all values).


Experimental perfect state transfer of an entangled photonic qubit.

Chapman RJ, Santandrea M, Huang Z, Corrielli G, Crespi A, Yung MH, Osellame R, Peruzzo A - Nat Commun (2016)

Perfect state transfer of entangled states with varying purity.Photon 1 of the state  is injected into waveguide 1 of the PST array. A delay is applied to the vertical component to control the purity of the state. (a) Relative delay of 0 μm, (b) 50 μm, (c) 100 μm and (d) 150 μm. Results have had the small imaginary components removed for brevity.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4837480&req=5

f5: Perfect state transfer of entangled states with varying purity.Photon 1 of the state is injected into waveguide 1 of the PST array. A delay is applied to the vertical component to control the purity of the state. (a) Relative delay of 0 μm, (b) 50 μm, (c) 100 μm and (d) 150 μm. Results have had the small imaginary components removed for brevity.
Mentions: where τ is controlled by altering the path length of the vertical component of the state. H(V) is the horizontal (vertical) component of the photon. Figure 5 presents density matrices for PST from waveguide 1 to waveguide 11 applied to entangled states of varying purity. The injected states are recovered with an average fidelity of 0.971±0.019 and an average similarity of 0.978±0.019 (see Supplementary Table 4 for all values).

Bottom Line: On a single device we perform three routing procedures on entangled states, preserving the encoded quantum state with an average fidelity of 97.1%, measuring in the coincidence basis.Our protocol extends the regular perfect state transfer by maintaining quantum information encoded in the polarization state of the photonic qubit.Our results demonstrate the key principle of perfect state transfer, opening a route towards data transfer for quantum computing systems.

View Article: PubMed Central - PubMed

Affiliation: Quantum Photonics Laboratory, School of Engineering, RMIT University, Melbourne, Victoria 3000, Australia.

ABSTRACT
The transfer of data is a fundamental task in information systems. Microprocessors contain dedicated data buses that transmit bits across different locations and implement sophisticated routing protocols. Transferring quantum information with high fidelity is a challenging task, due to the intrinsic fragility of quantum states. Here we report on the implementation of the perfect state transfer protocol applied to a photonic qubit entangled with another qubit at a different location. On a single device we perform three routing procedures on entangled states, preserving the encoded quantum state with an average fidelity of 97.1%, measuring in the coincidence basis. Our protocol extends the regular perfect state transfer by maintaining quantum information encoded in the polarization state of the photonic qubit. Our results demonstrate the key principle of perfect state transfer, opening a route towards data transfer for quantum computing systems.

No MeSH data available.