High-fidelityZ-measurement error encoding of optical qubits

High-fidelity Z-measurement error encoding of optical qubits

Measurement of qubits

Daniel F. V. James,* Paul G. Kwiat, William J. Munro, and Andrew G. White Theoretical Division T-4, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 Physics Division P-23, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 Department of Physics, University of Illinois, Urbana-Champaign, Illinois 61801 Department of Physics, University of Queensland, Brisbane, Queensland 40...

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.

Error Correction with Euclidean Qubits

In classical case there is simplest method of error correction with using three equal bits instead of one. In the paper is shown, how the scheme fails for quantum error correction with complex vector spaces of usual quantum mechanics, but works in real and quaternionic cases. It is discussed also, how to implement the three qubits scheme with using encoding of quaternionic qubit by Majorana spi...

Quantum error correction beyond qubits

Quantum computation and communication rely on the ability to manipulate quantum states robustly and with high fidelity. To protect fragile quantum-superposition states from corruption through so-called decoherence noise, some form of error correction is needed. Therefore, the discovery of quantum error correction1,2 (QEC) was a key step to turn the field of quantum information from an academic ...