|
| related topics |
| {time, decoherence, evolution} |
| {qubit, qubits, gate} |
| {energy, state, states} |
| {spin, pulse, spins} |
| {cos, sin, state} |
| {state, phys, rev} |
| {operator, operators, space} |
|
Always On Non-Nearest-Neighbor Coupling in Scalable Quantum Computing
Yong Hu, Zheng-Wei Zhou, Guang-Can Guo
abstract: We investigate the non-nearest-neighbor interaction effect in 1-D spin-1/2
chain model. In many previous schemes this long-range coupling is omitted
because of its relative weak strength compared with the nearest-neighbor
coupling. We show that the quantum gate deviation induced by the omitted
long-range interaction depends on not only its strength but also the scale of
the system. This implies that omitting the long-range interaction may challenge
the scalability of previous schemes. We further consider how to suppress this
unwanted effect. We propose a quantum computation scheme. In this scheme, by
using appropriate encoding method, we effectively negate the influence of the
next-nearest-neighbor interaction in order to improve the precision of quantum
gates. We also discuss the feasibility of this scheme in 1-D Josephson charge
qubit array system. This work may offer improvement in scalable quantum
computing.
- oai_identifier:
- oai:arXiv.org:quant-ph/0605175
- categories:
- quant-ph
- doi:
- 10.1088/1367-2630/9/2/027
- arxiv_id:
- quant-ph/0605175
- created:
- 2006-05-19
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