-- An article published in Science Advances [1], co-authored by Dr. David Petrosyan in collaboration with the experimental group of Prof. Pavlos Savvidis (Westlake University, China), reports on the experimental realization and characterization of a novel platform for analog quantum computation with semiconductor exciton-polaritons. In this system, a condensate of polaritons is confined by a spatially-patterned pump laser in an annular trap that supports energy-degenerate counter-circulating vortex modes with laser-controlled coupling. The qubit states are formed by the symmetric and antisymmetric superpositions of the vortex modes. By engineering the potential, coherent dynamics of the qubit and its initialization in the desired state can be performed with high precision. The article also discusses potential avenues to realize controllable interactions between such qubits to implement quantum gates and algorithms analogous to quantum computation with standard qubits.

[1] Barrat et al., Sci. Adv. 10, eado4042 (2024) https://doi.org/10.1126/sciadv.ado4042

-- Sanasar Babajanyan got an integration grant from the Higher Education and Science Committee of Armenia, and will join our department starting from November 2024. He is returning from NCBI, National Institute of Health, US. 

-- Varazdat Stepanyan submitted a paper that solved the negative pressure riddle, an important, extreme thermodynamic state whose existence and understanding was unclear despite long-term research based on van der Waals equations. Here is the arxiv version.

-- Vardan Bardakhchyan and Armen Allahverdyan submitted a paper explaining the basic aspects of human bargaining using the Weber law of psychophysics. Here is the arxiv version.

-- Ashot Matevosyan published a paper in JSTAT that proposes a solution to the rotating equilibrium problem, and also carefully discusses the relaxation of angular momentum. Here is the arxiv version and reference. 

-- Armen Allahverdyan, Theo Nieuwenhuizen and Roger Balian published a paper in Comptes Rendus Physique about teaching the theory of quantum measurements.

A. E. Allahverdyan, R. Balian, T. M. Nieuwenhuizen, Teaching ideal quantum measurement, from dynamics to interpretation, Comptes Rendus Physique, 25, 251-287 (2024). This one-page file explain the messages of this paper. Here is its arxiv version. 

-- Maria Apitonian successfully defended her batchelor thesis on thermodynamics of adaptation in American University of Armenia, Enginnering Sciences Faculty (supervisor Armen Allahverdyan).  

-- Arik Avagyan joined our research team.

-- Hayk Gevorgyan published a paper on composite pulses in Physical Review A:

H. L. Gevorgyan and N. V. Vitanov, Ultrahigh-fidelity composite quantum phase gates, Phys. Rev. A 109, 052625 (2024).