25 citations · 27 across the 3 of their papers we have counts for
3 papers
quant-ph2005★ 25 cited
Density Matrix in Quantum Mechanics and Distinctness of Ensembles Having the Same Compressed Density Matrix
Gui Lu Long, Yi-Fan Zhou, Jia-Qi Jin +2
We clarify different definitions of the density matrix by proposing the use of different names, the full density matrix for a single-closed quantum system, the compressed density m…
quant-ph2004
Construction of Elementary Gates in Quantum Computation by Joint Measurement
Jia-Qi Jin, Gui-Lu Long
In this paper, elementary quantum gate operations, such as the phase gate, the controlled-NOT gate, the swap and the Fredkin gate are constructed using joint measurement and pairs…
quant-ph2004★ 2 cited
Distinctness of ensembles having the same density matrix and the nature of liquid NMR quantum computing
Gui-Lu Long, Yi-Fan Zhou, Jia-Qi Jin +1
We show that differently constructed ensembles having the same density matrix may be physically distinguished by observing fluctuations of some observables. An explicit expression…