物理性质(NATURE PHYSICS)2013-09-05 2:57 AM

Quantum simulation of dynamical maps with trapped ions : Nature Physics : Nature Publishing Group

Dynamical maps describe general transformations of the state of a physical system—their iteration interpreted as generating a discrete time evolution. Prime examples include classical nonlinear systems undergoing transitions to chaos. Quantum mechanical counterparts show intriguing phenomena such as dynamical localization on the single-particle level. Here we extend the concept of dynamical maps to a many-particle context, where the time evolution involves both coherent and dissipative elements: we experimentally explore the stroboscopic dynamics of a complex many-body spin model with a universal trapped ion quantum simulator. We generate long-range phase coherence of spin by an iteration of purely dissipative quantum maps and demonstrate the characteristics of competition between combined coherent and dissipative non-equilibrium evolution—the hallmark of a previously unobserved dynamical phase transition. We assess the influence of experimental errors in the quantum simulation and tackle this problem by developing an efficient error detection and reduction toolbox based on quantum feedback.

KEYWORDS

SHARE & LIKE

COMMENTS

ABOUT THE AUTHOR

物理性质(NATURE PHYSICS)

0 Following 3 Fans 0 Projects 67 Articles

SIMILAR ARTICLES

Strong-field phenomena in optical nanostructures have enabled the integration of nanophotonics, plasmonics and attosecond spectroscopy. For example, tr

Read More

The lack of isolated X-ray pulsars with spin periods longer than 12 s raises the question of where the population of evolved high-magnetic-field neutro

Read More

The lack of isolated X-ray pulsars with spin periods longer than 12 s raises the question of where the population of evolved high-magnetic-field neutro

Read More

Abstract: The observation of new physics events with large missing transverse energy at the LHC would potentially serve as evidence for the direct prod

Read More

Abstract: The observation of new physics events with large missing transverse energy at the LHC would potentially serve as evidence for the direct prod

Read More

The observation of new physics events with large missing transverse energy at the LHC would potentially serve as evidence for the direct production of

Read More

The observation of new physics events with large missing transverse energy at the LHC would potentially serve as evidence for the direct production of

Read More

Abstract The first quantum correction to the IIA string effective action arises at the eight-derivative level and takes the schematic form . This corr

Read More

Abstract The first quantum correction to the IIA string effective action arises at the eight-derivative level and takes the schematic form . This corr

Read More

Abstract We investigate the holographic Renormalization Group (RG) flows and the critical phenomena that take place in the QFTʼs dual to the d-dimensi

Read More