12 research outputs found
Efficient Parity Encoded Optical Quantum Computing
We present a linear optics quantum computation scheme with a greatly reduced
cost in resources compared to KLM. The scheme makes use of elements from
cluster state computation and achieves comparable resource usage to those
schemes while retaining the circuit based approach of KLM
Loss-tolerant operations in parity-code linear optics quantum computing
A heavy focus for optical quantum computing is the introduction of
error-correction, and the minimisation of resource requirements. We detail a
complete encoding and manipulation scheme designed for linear optics quantum
computing, incorporating scalable operations and loss-tolerant architecture.Comment: 8 pages, 6 figure
Loss Tolerant Optical Qubits
We present a linear optics quantum computation scheme that employs a new
encoding approach that incrementally adds qubits and is tolerant to photon loss
errors. The scheme employs a circuit model but uses techniques from cluster
state computation and achieves comparable resource usage. To illustrate our
techniques we describe a quantum memory which is fault tolerant to photon loss
Fault Tolerance in Parity-State Linear Optical Quantum Computing
We use a combination of analytical and numerical techniques to calculate the
noise threshold and resource requirements for a linear optical quantum
computing scheme based on parity-state encoding. Parity-state encoding is used
at the lowest level of code concatenation in order to efficiently correct
errors arising from the inherent nondeterminism of two-qubit linear-optical
gates. When combined with teleported error-correction (using either a Steane or
Golay code) at higher levels of concatenation, the parity-state scheme is found
to achieve a saving of approximately three orders of magnitude in resources
when compared to a previous scheme, at a cost of a somewhat reduced noise
threshold.Comment: LaTeX, 10 pages, introduction updated for journal submissio
Quantum Optical Systems for the Implementation of Quantum Information Processing
We review the field of Quantum Optical Information from elementary
considerations through to quantum computation schemes. We illustrate our
discussion with descriptions of experimental demonstrations of key
communication and processing tasks from the last decade and also look forward
to the key results likely in the next decade. We examine both discrete (single
photon) type processing as well as those which employ continuous variable
manipulations. The mathematical formalism is kept to the minimum needed to
understand the key theoretical and experimental results
Linear optical quantum computation with parity encoding
We present a linear optics quantum computation scheme that employs an incremental parity encoding approach. The scheme uses techniques from cluster state computation and achieves comparable resource usage with increased tolerance to photon loss
Utilizing encoding in scalable linear optics quantum computing
We present a scheme which offers a significant reduction in the resources required to implement linear optics quantum computing. The scheme is a variation of the proposal of Knill, Laflamme and Milburn, and makes use of an incremental approach to the error encoding to boost probability of success