Linear Optical Quantum Computing in a Single Spatial Mode
| Autor: | Humphreys, Peter C., Metcalf, Benjamin J., Spring, Justin B., Moore, Merritt, Jin, Xian-Min, Barbieri, Marco, Kolthammer, W. Steven, Walmsley, Ian A. |
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| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | Phys. Rev. Lett. 111, 150501 (2013) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevLett.111.150501 |
| Popis: | We present a scheme for linear optical quantum computing using time-bin encoded qubits in a single spatial mode. We show methods for single-qubit operations and heralded controlled phase (CPhase) gates, providing a sufficient set of operations for universal quantum computing with the Knill-Laflamme-Milburn scheme. Our scheme is suited to available photonic devices and ideally allows arbitrary numbers of qubits to be encoded in the same spatial mode, demonstrating the potential for time-frequency modes to dramatically increase the quantum information capacity of fixed spatial resources. As a test of our scheme, we demonstrate the first entirely single spatial mode implementation of a two-qubit quantum gate and show its operation with an average fidelity of 0.84+-0.07. Comment: 5 pages, 4 figures. Updated to be consistent with the published version |
| Databáze: | arXiv |
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