All Optical Cellular Quantum Computer having Ancilla Bits for Operations in Each Cell

Abstract

A quantum cellular network with a qubit and ancilla bits in each cell is proposed. The whole circuit works only with the help of external optical pulse sequences. In the operation, some of the ancilla bits are activated, and autonomous single- and two-qubit operations are made. In the sleep mode of a cell, the decoherence of the qubit is negligibly small. Since only two cells at most are active at once, the coherence can be maintained for a sufficiently long time for practical purposes. A device structure using a quantum dot array with possible operation and measurement schemes is also proposed.

14 pages, 5 figures RevTeX ;a single sentense is modified for the clarity

References in corpus (7)

• Quantum Computation with Quantum Dots
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Cited by in corpus (2)

• Generation of maximum spin entanglement induced by cavity field in quantum-dot systems
• Realization of symmetric sharing of entanglement in semiconductor microcrystallites coupled by a cavity field