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151.
鉴于在不同的温度下水(或溶液)的pH值会有所不同,对环境标准中不规定pH值限值的温度条件是否合理进行了论证。通过分析各环境标准的特点、各环境标准中pH值参数的控制目的,结合各环境标准指定的监测方法的技术内容,得出以下结论:《海水水质标准》、《地表水环境质量标准》、《污水综合排放标准》和《土壤环境质量标准》中pH值限值不规定温度条件是合理、可操作的;《危险废物鉴别标准腐蚀性鉴别》pH值限值应该规定温度条件;对于《地下水质量标准》,有待于进一步实验验证温度对pH值的影响程度。 相似文献
152.
Generation of four-atom cluster states in thermal cavity and implementing remote controlled not gate 总被引:2,自引:0,他引:2
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We propose an experimentally feasible scheme for preparing a four-atom cluster state
in a thermal cavity. In the scheme, the cavity field is only virtually excited and
the photon-number-dependent part in the effective Hamiltonian is cancelled so that
the system is insensitive to the cavity decay and the thermal field. At the same
time, the scheme can be generalized to prepare n-atom cluster states with the
success probability 100\%. In addition, using the four-atom cluster state, we also
propose a simpler scheme for implementing a remote--controlled not gate (CNOT)
without the Bell states measurement. 相似文献
153.
A scheme for conditional quantum phase gate viabimodal cavity and a Λ-type three-level atom
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We propose a scheme to implement a two-qubit conditional quantum
phase gatefor the intracavity field viaa single three-level
$\Lambda$-type atom driven by two modes in a high-Q cavity. The
quantum information is encoded on the Fock states of the bimodal
cavity. The gate's averaged fidelity is expected to reach $99.8\%$. 相似文献
154.
SONG Ke-Hui ZHOU Zheng-Wei GUO Guang-Can 《理论物理通讯》2006,46(4):631-634
We present a scheme to realize geometric phase-shift gate for two superconducting quantum interference device (SQUID) qubits coupled to a single-mode microwave field. The geometric phase-shift gate operation is performed in two lower flux states, and the excited state [2〉 would not participate in the procedure. The SQUIDs undergo no transitions during the gate operation. Thus, the docoherence due to energy spontaneous emission based on the levels of SQUIDs are suppressed. The gate is insensitive to the cavity decay throughout the operation since the cavity mode is displaced along a circle in the phase space, acquiring a phase conditional upon the two lower flux states of the SQUID qubits, and the cavity mode is still in the original vacuum state. Based on the SQUID qubits interacting with the cavity mode, our proposed approach may open promising prospects for quantum iogic in SQUID-system. 相似文献
155.
We show how a CNOT gate and single-qubit rotation can be implemented non-locally,We also report on the quantitative relations between these quantum actions,entanglement and classical communication resources required in the implementation. 相似文献
156.
Preparation of arbitrary n-particle d-dimensional superposition states using only single qubit operations and CNOT gates
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In this article, using only single qubit operation and a CNOT gate, we propose a scheme for creating arbitrary n-particle d-dimensional superposition states including entangled states and give the relevant circuits for realizing this scheme. 相似文献
157.
Implementation of non-local multiple qubits controlled-not operation via partially entangled channels
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We propose two different schemes for probabilistic implementing a non-local multiple qubits controlled-not operation via partially entangled quantum channels. The overall physical resources required for accomplishing these schemes are different, and the successful implementation probabilities are also different. 相似文献
158.
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