Quantum states for quantum metrology

PhD type: 
Doctoral School of Physical Sciences
Year: 
2025/2026/1
Unit: 
Department of Theoretical Physics, Institute of Physics
Address of unit: 
1111 Budapest, Műegyetem rakpart 8.
Description: 

The task of the student is to explore the properties of quantum states generated by random quantum circuits from the perspective of quantum metrology and quantum resources. Random quantum circuits with U(1) symmetry generate states, which form a subset of Haar-random states. For Z =0, they are expected to have a large entanglement entropy, and so-called magic (quantified through the so-called stabilizer Rényi entropy), and are expected to be similar to the so-called Dicke states. These latter, being analogs of squeezed states and Cat states, enable very precise measurements. The student should explore the metrological usefulness of these states numerically and analytically, and realize them on existing quantum platforms such as IBM quantum computers, quantum simulators (D-wave), and QuEra.

Requirements: 

Excellent results in theoretical physics.

State: 
Végleges
Témavezető
Name: 
Zaránd Gergely
Email: 
zarand.gergely.attila@ttk.bme.hu
Institute: 
Department of Theoretical Physics, Institute of Physics
Assignment: 
Prof.
Scientific degree: 
DSc
Stipendicum Hungaricum: 
No