By factorizing a general one-bit transformation matrix for one-bit gates in quantum computer,a general unitary transformation is constructed,which can serve as(controlled)^(m) gate for the conditional quantum dynamics...By factorizing a general one-bit transformation matrix for one-bit gates in quantum computer,a general unitary transformation is constructed,which can serve as(controlled)^(m) gate for the conditional quantum dynamics.When the quantized single-mode electromagnetic field containing n or no photons acts as the controlled bit,the quantum controlled-NOT gates and square root of the controlled-NOT gates in cavity-quantum electrodynamics are realized.展开更多
By invoking the concept of displaced number state in quantum optics,the complete eigen-states in one-dimensional mesoscopic rings with electron-phonon coupling are abtained and the eignevalues followed.It is shown tha...By invoking the concept of displaced number state in quantum optics,the complete eigen-states in one-dimensional mesoscopic rings with electron-phonon coupling are abtained and the eignevalues followed.It is shown that the eigenvalues and persistent current depend on both coupling strength and phonon number.展开更多
基金Supported by the Youth Science Foundation of Jilin Education Committee。
文摘By factorizing a general one-bit transformation matrix for one-bit gates in quantum computer,a general unitary transformation is constructed,which can serve as(controlled)^(m) gate for the conditional quantum dynamics.When the quantized single-mode electromagnetic field containing n or no photons acts as the controlled bit,the quantum controlled-NOT gates and square root of the controlled-NOT gates in cavity-quantum electrodynamics are realized.
基金Supported by the Science Foundation of Jilin Education Committee for Young Scientists(No.96-15).
文摘By invoking the concept of displaced number state in quantum optics,the complete eigen-states in one-dimensional mesoscopic rings with electron-phonon coupling are abtained and the eignevalues followed.It is shown that the eigenvalues and persistent current depend on both coupling strength and phonon number.
