ELFT HÍRADÓ

[Kormos Márton <kormos.marton AT ttk.bme.hu>]

MEGHÍVÓ

BME Elméleti Fizika Szeminárium,

márc. 27. péntek 10h15,

1111 Budapest, Budafoki út 8., BME F III. magasföldszint 01.,
Elméleti Fizika Tanszék szemináriumi szoba

Asbóth János (BME Elm. Fiz. Tanszék, HUN-REN Wigner Fizikai Kutatóközpont)
Macroscopic Quantum Mechanics in Electrical Circuits: the 2025 Nobel prize in 
Physics

The 2025 Nobel prize in physics was awarded to John Clarke, Michel H. 
Devoret, and John M. Martinis for their joint experimental work done in 
1984-85, "the discovery of macroscopic quantum mechanical tunnelling and 
energy quantisation in an electric circuit". Later work of Devoret and 
Martinis on this experimental platform, building on "energy quantisation" led 
to the development of the transmon qubit, and to the rise of superconducting 
quantum computers championed by Google that we read so much about. But what 
is "macroscopic quantum tunneling"? How is it different from regular 
tunneling, or from the "tunneling phenomena in superconductors" that 
Josephson received the Nobel prize for in 1973? And how is it related to "the 
most fundamental problem of modern physics, over which philosophers as well 
as physicists have puzzled for decades" (quote from the 1983, Caldeira and 
Leggett paper)?

Minden érdeklődőt szeretettel várunk.

A további program megtekinthető itt: https://dtp.physics.bme.hu/TheorySeminars

Kormos Márton,
szemináriumi koordinátor