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6 papers · 2 filters
Recursive Encoding and Decoding of Noiseless Subsystem and Decoherence Free Subspace
Chi-Kwong Li, Mikio Nakahara, Yiu-Tung Poon +2
When the environmental disturbace to a quantum system has a wavelength much larger than the system size, all qubits localized within a small area are under action of the same error…
Efficient Quantum Error Correction for Fully Correlated Noise
Chi-Kwong Li, Mikio Nakahara, Yiu-Tung Poon +2
We investigate an efficient quantum error correction of a fully correlated noise. Suppose the noise is characterized by a quantum channel whose error operators take fully correlate…
Light storage in an optically thick atomic ensemble under conditions of electromagnetically induced transparency and four-wave mixing
Nathaniel B. Phillips, Alexey V. Gorshkov, Irina Novikova
We study the modification of a traditional electromagnetically induced transparency (EIT) stored light technique that includes both EIT and four-wave mixing (FWM) in an ensemble of…
Quadrature noise in light propagating through a cold 87Rb atomic gas
Travis Horrom, Arturo Lezama, Salim Balik +2
We report on the study of the noise properties of laser light propagating through a cold 87Rb atomic sample held in a magneto-optical trap. The laser is tuned around the Fg = 2 \ri…
A note on the realignment criterion
Chi-Kwong Li, Yiu-Tung Poon, Nung-Sing Sze
For a quantum state in a bipartite system represented as a density matrix, researchers used the realignment matrix and functions on its singular values to study the separability of…
A unitary quantum lattice gas algorithm for two dimensional quantum turbulence
Bo Zhang, George Vahala, Linda Vahala +1
Quantum vortex structures and energy cascades are examined for two dimensional quantum turbulence (2D QT) at zero temperature. A special unitary evolution algorithm, the quantum la…