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Linear Optical Quantum Computing in a Single Spatial Mode | | Peter C. Humphreys
; Benjamin J. Metcalf
; Justin B. Spring
; Merritt Moore
; Xian-Min Jin
; Marco Barbieri
; W. Steven Kolthammer
; Ian A. Walmsley
; | | Date: |
15 May 2013 | | Abstract: | 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. | | Source: | arXiv, 1305.3592 | | Services: | Forum | Review | PDF | Favorites | |
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