Passively self-error-rejecting qubit transmission over a collective-noise channel
Passively self-error-rejecting qubit transmission over a collective-noise channel
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DOI：
10.26421/qic11.11-12-2
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发表时间：
2008-01
期刊：
影响因子：
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通讯作者：
Fuguo Deng;Xihan Li;Hong-Yu Zhou
中科院分区：
文献类型：
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作者：
Fuguo Deng;Xihan Li;Hong-Yu Zhou
针对集体噪声信道中单个量子比特的任意偏振态，提出了一种被动抑制自误差的单量子比特传输方案，该方案不需要额外的量子比特和纠缠。通过使用一些马赫-曾德尔干涉仪将单个量子比特分裂成几个波包，我们可以在不同的时间盒中通过后选择获得接近100%的成功几率，而与集体噪声的参数无关。它比使用无消相干子空间的方案和使用附加量子比特的方案更简单和灵活。人们可以直接将该方案应用于几乎所有基于单光子或纠缠光子系统对抗集体噪声的量子通信协议。
We propose a passively self-error-rejecting single-qubit transmission scheme for an arbitrary polarization state of a single qubit over a collective-noise channel, without resorting to additional qubits and entanglement. By splitting a single qubit into some wavepackets with some Mach-Zehnder interferometers, we can obtain an uncorrupted state with a success probability approaching 100% via postselection in different time bins, independent of the parameters of collective noise. It is simpler and more flexible than the schemes utilizing decoherence-free subspace and those with additional qubits. One can directly apply this scheme to almost all quantum communication protocols based on single photons or entangled photon systems against a collective noise.