期刊
PHYSICAL REVIEW LETTERS
卷 119, 期 8, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.119.080501
关键词
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资金
- Austrian Science Fund (FWF) [P25354-N20, F4016-N23]
- European Research Council (ERC) [UQUAM]
- Deutsche Akademie der Naturforscher Leopoldina [LPDR 2015-01]
- Deutsche Forschungsgemeinschaft
- Institut fur Quanteninformation GmbH
- Austrian Science Fund (FWF) [P25354] Funding Source: Austrian Science Fund (FWF)
The theory of phase transitions represents a central concept for the characterization of equilibrium matter. In this work we study experimentally an extension of this theory to the nonequilibrium dynamical regime termed dynamical quantum phase transitions (DQPTs). We investigate and measure DQPTs in a string of ions simulating interacting transverse-field Ising models. During the nonequilibrium dynamics induced by a quantum quench we show for strings of up to 10 ions the direct detection of DQPTs by revealing nonanalytic behavior in time. Moreover, we provide a link between DQPTs and the dynamics of other quantities such as the magnetization, and we establish a connection between DQPTs and entanglement production.
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