Floquet time-crystals as sensors of AC fields

Autor:	Iemini, Fernando, Fazio, Rosario, Sanpera, Anna
Rok vydání:	2023
Předmět:	Quantum Physics Condensed Matter - Other Condensed Matter Condensed Matter - Statistical Mechanics
Zdroj:	Phys. Rev. A 109, L050203 (2024)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevA.109.L050203
Popis:	The long range spatial and temporal ordering displayed by discrete time crystals, can become advantageous properties when used for sensing extremely weak signals. Here, we investigate their performance as quantum sensors of weak AC-fields and demonstrate, using the quantum Fisher information measure, that they can overcome the shot noise limit while allowing long interrogation times. In such systems, collective interactions stabilize their dynamics against noise making them robust enough to protocol imperfections. Comment: 6 + 6 pages, 5 + 5 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2306.03927 Zobrazit plný text záznamu View this record from Arxiv