TEAPOT · ThErmAl Probes Of fractional quantum hall Transport
Horizon 2020 — Marie Skłodowska-Curie Actions
- Duration
- 2022-01-01 → 2024-02-15
- EU contribution
- €203,852
- Participants
- 1
- Scheme
- MSCA-IF
Lines connect the coordinator with its partners.
Results in brief
ThErmAl Probes Of fractional quantum hall Transport
In a strong magnetic field and at extremely low temperatures, a two-dimensional sheet of electrons can transition into a strongly correlated state: the fractional quantum Hall (FQH) state. The one-dimensional edge of such a sheet is by itself a viable experimental platform for controlled studies of a wide range of quantum phenomena. In particular, recent experimental developments have enabled detailed thermal transport experiments for probing the properties of such FQH edges. Despite this progress, many pressing questions on edge energy propagation, equilibration, and redistribution have remained unanswered. The purpose of the TEAPOT project was to theoretically address these and related questions by introducing new observables - heat noise, mixed noise, and delta-T noise for FQH edges. The main goal was to use these promising quantities as novel and complementary tools for probing emergent transport phenomena, not directly or not uniquely related to the electrical charge. To this end, TEAPOT sought to provide theoretical descriptions of the interrelated edge propagation of charge noise, heat noise, delta-T noise, and mixed noise. As a result, TEAPOT has opened up for novel types of FQH experiments, which have improved the fundamental understanding of strongly correlated quantum behaviour on the nanoscale. While primarily of fundamental interest, the acquired knowledge about strongly correlated quantum phenomena paves the way for developing future quantum technologies, e.g., small-scale thermodynamical or quantum computational applications. TEAPOT concluded that complementary thermal probes, such as delta-T noise, heat noise, and thermal conductance, indeed provide several advantages over the conventionally used charge-based shot noise for probing fractional quantum Hall edge states as well as related, strongly correlated quantum systems.
Data: CORDIS, © European Union
Project objective
In a strong magnetic field and at extremely low temperatures, a two-dimensional sheet of electrons can transition into a strongly correlated state: the fractional quantum Hall (FQH) state. The one-dimensional edge of such a sheet is by itself a viable experimental platform for controlled studies of a wide range of quantum phenomena. Recent experimental developments have enabled detailed thermal transport experiments for probing the properties of such FQH edges. Despite this progress, many questions on edge energy propagation, equilibration, and redistribution remain unanswered. The theoretical TEAPOT project will address these questions by introducing new observables - heat noise, mixed noise and delta-T noise -for disordered transport on general FQH edges. The main goal is to use these promising quantities as novel and complementary tools for probing emergent transport phenomena, not directly or not uniquely related to the electrical charge. TEAPOT will be led by the experienced researcher (ER), as a postdoc project in collaboration with the Supervisor: an expert on quantum thermodynamical processes in nanoscale devices. The ER has recently developed a theoretical model connecting the propagation of charge, heat, and charge noise on general FQH edges. With this substantial preparation, TEAPOT will reach its goal by generating a full theoretical description of the interrelated edge propagation of charge, heat, charge noise, heat noise, delta-T noise, and mixed noise. This description will be derived by the ER and the Supervisor, combining chiral Luttinger liquid techniques with concepts in quantum thermodynamics. TEAPOT will enable novel ways to design and analyze FQH experiments, improving the fundamental understanding of strongly correlated quantum behaviour on the nanoscale. In turn, such an understanding is crucial for the design of novel types of quantum devices, e.g., for small scale thermodynamical or quantum computational applications.
Original text from CORDIS.
Participants
- CHALMERS TEKNISKA HOGSKOLA AB · GoteborgCoordinatorSweden
Links
Data: CORDIS, © European Union