609 citations · 4.2k across the 137 of their papers we have counts for
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Efficient tests for experimental quantum gates
Holger F. Hofmann
Realistic quantum gates operate at non-vanishing noise levels. Therefore, it is necessary to evaluate the performance of each device according to some experimentally observable cri…
Complementary classical fidelities as an efficient criterion for the evaluation of experimentally realized quantum operations
Holger F. Hofmann
It is shown that a good estimate of the fidelity of an experimentally realized quantum process can be obtained by measuring the outputs for only two complementary sets of input sta…
Quantum parallelism of the controlled-NOT operation: an experimental criterion for the evaluation of device performance
Holger F. Hofmann
It is shown that a quantum controlled-NOT gate simultaneously performs the logical functions of three distinct conditional local operations. Each of these local operations can be v…
Efficiencies for the single mode operation of a quantum optical nonlinear shift gate
Kunihiro Kojima, Holger F. Hofmann, Shigeki Takeuchi +1
We investigate the single mode operation of a quantum optical nonlinear πphase shift gate implemented by a single two-level atom in one-dimensional free space. Since the single mod…
A study on the shape of two-photon wavefunctions after the nonlinear interaction with a one-dimensional atom
Kunihiro Kojima, Holger F. Hofmann, Shigeki Takeuchi +1
We study the interaction of Gaussian one- and two-photon pulses with a single two-level atom based on a one-dimensional model of pulse propagation to and from the atom. The charact…