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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.


Experimental data from the characterization and performance of perfect state transfer waveguide array.(a–c) Propagation simulations showing the device implementation to enable specific waveguide input. (d–f) Output probability distributions for each input of the PST array for horizontally and vertically polarized laser light. (g–i) Quantum process matrix for each transfer in the PST array measured with single-photon quantum process tomography. (j–l) Two-photon quantum state tomography is performed after photon 1 of the polarization entangled Bell state  has been relocated. Results have had the small imaginary components removed for brevity.
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f3: Experimental data from the characterization and performance of perfect state transfer waveguide array.(a–c) Propagation simulations showing the device implementation to enable specific waveguide input. (d–f) Output probability distributions for each input of the PST array for horizontally and vertically polarized laser light. (g–i) Quantum process matrix for each transfer in the PST array measured with single-photon quantum process tomography. (j–l) Two-photon quantum state tomography is performed after photon 1 of the polarization entangled Bell state has been relocated. Results have had the small imaginary components removed for brevity.

Mentions: We inject photons into waveguides 1, 6 and 10 of the array, which after time tPST transfer to waveguides 11, 6 and 2, respectively. Figure 3a–c presents propagation simulations for each transfer. Input waveguides extend to the end of the device to allow selective injection.


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)

Experimental data from the characterization and performance of perfect state transfer waveguide array.(a–c) Propagation simulations showing the device implementation to enable specific waveguide input. (d–f) Output probability distributions for each input of the PST array for horizontally and vertically polarized laser light. (g–i) Quantum process matrix for each transfer in the PST array measured with single-photon quantum process tomography. (j–l) Two-photon quantum state tomography is performed after photon 1 of the polarization entangled Bell state  has been relocated. 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

f3: Experimental data from the characterization and performance of perfect state transfer waveguide array.(a–c) Propagation simulations showing the device implementation to enable specific waveguide input. (d–f) Output probability distributions for each input of the PST array for horizontally and vertically polarized laser light. (g–i) Quantum process matrix for each transfer in the PST array measured with single-photon quantum process tomography. (j–l) Two-photon quantum state tomography is performed after photon 1 of the polarization entangled Bell state has been relocated. Results have had the small imaginary components removed for brevity.
Mentions: We inject photons into waveguides 1, 6 and 10 of the array, which after time tPST transfer to waveguides 11, 6 and 2, respectively. Figure 3a–c presents propagation simulations for each transfer. Input waveguides extend to the end of the device to allow selective injection.

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.