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情境策略转变学生物理前概念 总被引:1,自引:0,他引:1
了解学生相关的前概念,创设与前概念相联系的情境.同时,创设新旧概念冲突的情境,有助于学生获得科学概念,是一种积极而有效的物理概念教学策略. 相似文献
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Multipartite entanglement in the interaction system between a single-mode microwave cavity field and superconducting charge qubits 下载免费PDF全文
This paper proposes a method of generating multipartite entanglement through using
d.c. superconducting quantum interference devices (SQUID) inside a standing
wave cavity. In this scheme, the d.c. SQUID works in the charge region. It
is shown that, a large number of important multipartite entangled states can
be generated by a controllable interaction between a cavity field and
qubits. It is even possible to produce entangled states involving different
cavity modes based on the measurement of charge qubits states. After such
superpositions states are created, the interaction can be switched off by
the classical magnetic field through the SQUID, and there is no information
transfer between the cavity field and the charge qubits. 相似文献
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Non-Gaussianity dynamics of two-mode squeezed number states subject to different types of noise based on cumulant theory 下载免费PDF全文
We provide a measure to characterize the non-Gaussianity of phase-space function of bosonic quantum states based on the cumulant theory. We study the non-Gaussianity dynamics of two-mode squeezed number states by analyzing the phase-averaged kurtosis for two different models of decoherence: amplitude damping model and phase damping model.For the amplitude damping model, the non-Gaussianity is very fragile and completely vanishes at a finite time. For the phase damping model, such states exhibit rich non-Gaussian characters. In particular, we obtain a transition time that such states can transform from sub-Gaussianity into super-Gaussianity during the evolution. Finally, we compare our measure with the existing measures of non-Gaussianity under the independent dephasing environment. 相似文献
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Fano Interference versus Kondo Effect in Strongly Correlated T-Shaped Quantum Dots Embedded in an Aharonov-Bohm Ring 下载免费PDF全文
We theoretically investigate the properties of the ground state of the strongly correlated T-shaped double quantum dots embedded in an Aharonov-Bohm ring in the Kondo regime by means of the one-impurity Anderson Hamiltonian. It is found that in this system, the persistent current depends sensitively on the parity and size of the ring. With the increase of interdot coupling, the persistent current is suppressed due to the enhancing Fano interference weakening the Kondo effect. Moreover, when the spin of quantum dot embedded in the Aharonov- Bohm ring is screened, the persistent current peak is not affected by interdot coupling. Thus this model may be a new candidate for detecting Kondo screening cloud. 相似文献
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Scheme for realizing quantum computation and quantum information transfer with superconducting qubits coupling to a 1D transmission line resonator 下载免费PDF全文
This paper proposes a simple scheme for realizing one-qubit and
two-qubit quantum gates as well as multiqubit entanglement based on
dc-SQUID charge qubits through the control of their coupling to a 1D
transmission line resonator (TLR). The TLR behaves effectively as a
quantum data-bus mode of a harmonic oscillator, which has several
practical advantages including strong coupling strength,
reproducibility, immunity to 1/f noise, and suppressed spontaneous
emission. In this protocol, the data-bus does not need to stay
adiabatically in its ground state, which results in not only fast
quantum operation, but also high-fidelity quantum information
processing. Also, it elaborates the transfer process with the 1D
transmission line. 相似文献
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