5 papers
Optimal generation of single-qubit operation from an always-on interaction by algebraic decoupling
Jun Zhang, K. Birgitta Whaley
We present a direct algebraic decoupling approach to generate arbitrary single-qubit operations in the presence of a constant interaction by applying local control signals. To over…
Generation of quantum logic operations from physical Hamiltonians
Jun Zhang, K. Birgitta Whaley
We provide a systematic analysis of the physical generation of single- and two-qubit quantum operations from Hamiltonians available in various quantum systems for scalable quantum…
Minimum construction of two-qubit quantum operations
Jun Zhang, Jiri Vala, Shankar Sastry +1
Optimal construction of quantum operations is a fundamental problem in the realization of quantum computation. We here introduce a newly discovered quantum gate, B, that can implem…
Optimal quantum circuit synthesis from Controlled-U gates
Jun Zhang, Jiri Vala, Shankar Sastry +1
From a geometric approach, we derive the minimum number of applications needed for an arbitrary Controlled-Unitary gate to construct a universal quantum circuit. A new analytic con…
Exact two-qubit universal quantum circuit
Jun Zhang, Jiri Vala, Shankar Sastry +1
We provide an analytic way to implement any arbitrary two-qubit unitary operation, given an entangling two-qubit gate together with local gates. This is shown to provide explicit c…