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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.


Illustration of a one-dimensional perfect state transfer lattice connecting two quantum processors.By engineering the Hamiltonian of a lattice, the state at the first site is transferred to the last site after a specific time. This Hamiltonian defines the perfect state transfer protocol3, which can be used for routing quantum information inside a quantum processor.
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f1: Illustration of a one-dimensional perfect state transfer lattice connecting two quantum processors.By engineering the Hamiltonian of a lattice, the state at the first site is transferred to the last site after a specific time. This Hamiltonian defines the perfect state transfer protocol3, which can be used for routing quantum information inside a quantum processor.

Mentions: The perfect state transfer (PST) protocol utilizes an engineered but fixed coupled lattice. Quantum states are transferred between sites through Hamiltonian evolution for a specified time234567. For a one-dimensional system with N sites, the state intially at site n is transferred to site N−n+1 with 100% probability without need for active control on the coupling21. PST can be performed on any quantum computing architecture where coupling between sites can be engineered, such as ion traps18 and quantum dots22. Figure 1 presents an illustration of the PST protocol. The encoded quantum state, initially at the first site, is recovered at the final site after a specific time. In the intermediate stages, the qubit is in a superposition across the lattice. Aside from qubit relocation, the PST framework can be applied to entangled W-state preparation23, state amplification24 and even quantum computation2526272829.


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)

Illustration of a one-dimensional perfect state transfer lattice connecting two quantum processors.By engineering the Hamiltonian of a lattice, the state at the first site is transferred to the last site after a specific time. This Hamiltonian defines the perfect state transfer protocol3, which can be used for routing quantum information inside a quantum processor.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

f1: Illustration of a one-dimensional perfect state transfer lattice connecting two quantum processors.By engineering the Hamiltonian of a lattice, the state at the first site is transferred to the last site after a specific time. This Hamiltonian defines the perfect state transfer protocol3, which can be used for routing quantum information inside a quantum processor.
Mentions: The perfect state transfer (PST) protocol utilizes an engineered but fixed coupled lattice. Quantum states are transferred between sites through Hamiltonian evolution for a specified time234567. For a one-dimensional system with N sites, the state intially at site n is transferred to site N−n+1 with 100% probability without need for active control on the coupling21. PST can be performed on any quantum computing architecture where coupling between sites can be engineered, such as ion traps18 and quantum dots22. Figure 1 presents an illustration of the PST protocol. The encoded quantum state, initially at the first site, is recovered at the final site after a specific time. In the intermediate stages, the qubit is in a superposition across the lattice. Aside from qubit relocation, the PST framework can be applied to entangled W-state preparation23, state amplification24 and even quantum computation2526272829.

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.