Chaotic dynamical ferromagnetic phase induced by nonequilibrium quantum fluctuations

Alessio Lerose (Avtor), Jamir Marino (Avtor), Bojan Žunkovič (Avtor), Andrea Gambassi (Avtor), Alessandro Silva (Avtor)

Povzetek

We investigate the robustness of a dynamical phase transition against quantum fluctuations by studying the impact of a ferromagnetic nearest-neighbor spin interaction in one spatial dimension on the nonequilibrium dynamical phase diagram of the fully connected quantum Ising model. In particular, we focus on the transient dynamics after a quantum quench and study the prethermal state via a combination of analytic time-dependent spin wave theory and numerical methods based on matrix product states. We find that, upon increasing the strength of the quantum fluctuations, the dynamical critical point fans out into a chaotic dynamical phase within which the asymptotic ordering is characterized by strong sensitivity to the parameters and initial conditions. We argue that such a phenomenon is general, as it arises from the impact of quantum fluctuations on the mean-field out of equilibrium dynamics of any system which exhibits a broken discrete symmetry.

Ključne besede

kvantna mehanika;neravnovesna statistična mehanika;quantum mechanics;nonequilibrium statistical mechanics;

Podatki

Jezik:	Angleški jezik
Leto izida:	2018
Tipologija:	1.01 - Izvirni znanstveni članek
Organizacija:	UL FMF - Fakulteta za matematiko in fiziko
UDK:	536.93
COBISS:	3192932
ISSN:	0031-9007
Št. ogledov:	805
Št. prenosov:	480
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Slovenski jezik
Sekundarne ključne besede:	kvantna mehanika;neravnovesna statistična mehanika;
Strani:	str. 130603-1-130603-5
Letnik:	ǂVol. ǂ120
Zvezek:	ǂiss. ǂ13
Čas izdaje:	2018
DOI:	10.1103/PhysRevLett.120.130603
ID:	10983604