Attila B. Nagy

Quantum computing on lattices using global two-qubit gates

We study the computation power of lattices composed of two-dimensional systems (qubits) on which translationally invariant global two-qubit gates can be performed. We show that if a specific set of six global two qubit gates can be performed and if the initial state of the lattice can be suitably chosen, then a quantum computer can be efficiently simulated.

Acoustic design of a new museum

In this paper, we report on the acoustic design of a new museum. Besides the general exhibition space, the museum building includes three larger multipurpose halls that will give place for lectures and diverse events. Defining the acoustic requirements of the multipurpose hall is always a hard to reach compromise. We demonstrate the results of the international cooperation of acoustic engineers and architects, and show how computer aided modeling helped during all design phases to achieve the fine-tuned final stage.

Acoustic design and evaluation of a multi‐purpose hall of a new conference centre

At Forum Acusticum 2005 the building and room acoustic design of a new Conference Centre was presented. Since then the construction work has been finished and the Centre is now open. The Conference Centre itself is a multi‐functional building, having three wings of different functions. The Main Hall of the Centre is a room for 750 people which can be extended with adjacent section rooms for 1100 persons, giving a total volume of 14000 m3. It was designed to host conferences, lectures, and ‐ most of the time ‐ to be used as a concert hall. The extremely different acoustical demands of being a concert hall and a lecture room had been fulfilled with appropriate room acoustic design and with variable acoustics by employing a DCR (Digital Control of Reverberation) system. In this paper we give a report on the achieved acoustical performance of the Main Hall of the Conference Centre. We have performed extensive room acoustic measurements in the Main Hall, the results of which are compared to the designed values and are presented in this paper. The design of the DCR system is discussed in a different paper.