Seminario | Quantum Many-Body Metrology: From Precision Limits to Thermalization Bounds

Seminario impartido por Martí Perarnau Llobet (Universidad Autònoma de Barcelona).

Resumen:

What are the ultimate bounds nature imposes when quantum systems interact with heat? In this talk, we’ll look at this question from two complementary angles: parameter estimation and speed of thermalization. First, we explore how much information can be extracted from a quantum probe at thermal equilibrium, deriving fundamental bounds for the Quantum Fisher Information of thermal and ground state probes. But reaching equilibrium takes time. In the second part, we use a similar framework of Hamiltonian estimation to show that quantum mechanics places a strict speed limit on the thermalization process itself. At high temperatures, this limit is set by the Planckian dissipation time ($\tau \geq \hbar / 2k_B T$), while at low temperatures, it’s governed by the system’s spectral gap.

This talk is based on https://arxiv.org/abs/2402.06582 and https://arxiv.org/abs/2506.19188

El seminario es accesible para los estudiantes de grado, a los que se recomienda su asistencia.

Fecha: martes 26 de mayo de 2026
Lugar: Facultad de Ciencias – Seminario de Física Computacional. Planta baja del edificio de Física.
Horario: 10:00 h.
Organiza: Grupo de Termodinámica y Computación Cuántica
Más información: Michalis Skotiniotis | Grupo de Termodinámica y Información Cuántica. Departamento de Electromagnetismo y Física de la Materia | mskotiniotis@onsager.ugr.es

Seminario | Quantum Many-Body Metrology: From Precision Limits to Thermalization Bounds

26 mayo 2026 | 10:00 h

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