949 research outputs found
A BOUND TESTING ANALYSIS OF EXCHANGE RATE PASS- THROUGH TO AGGREGATE IMPORT PRICES IN NIGERIA: 1980-2006
This paper examines the extent of pass-through of exchange rate into import prices for Nigeria between 1980 and 2006 using the recently developed UECM-Bounds test proposed by Pesaran et al. (2001). Empirical evidence reveals that world export prices has a dominant effect compared to exchange rate in explaining changes in Nigeria¡¯s import prices in the short and long run. The major implication for our study therefore is that exogenous factors such as world export prices appeared to be more important determinants of domestic import prices than a country¡¯s exchange rate policies.Aggregate Import Price, World Export Price, Bound Testing, Nigeria
A Bottom-up Approach to Constructing Symmetric Variational Quantum Circuits
In the age of noisy quantum processors, the exploitation of quantum
symmetries can be quite beneficial in the efficient preparation of trial
states, an important part of the variational quantum eigensolver algorithm. The
benefits include building quantum circuits which are more compact, with lesser
number of paramaters, and more robust to noise, than their non-symmetric
counterparts. Leveraging on ideas from representation theory we show how to
construct symmetric quantum circuits. Similar ideas have been previously used
in the field of tensor networks to construct symmetric tensor networks. We
focus on the specific case of particle number conservation, that is systems
with U(1) symmetry. Based on the representation theory of U(1), we show how to
derive the particle-conserving exchange gates, which are commonly used in
constructing hardware-efficient quantum circuits for fermionic systems, like in
quantum chemistry, material science, and condensed-matter physics. We tested
the effectiveness of our circuits with the Heisenberg XXZ model.Comment: 18 pages, 7 figure
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