scholarly journals A Quantum Many-Body Spin System in an Optical Lattice Clock

Science ◽  
2013 ◽  
Vol 341 (6146) ◽  
pp. 632-636 ◽  
Author(s):  
M. J. Martin ◽  
M. Bishof ◽  
M. D. Swallows ◽  
X. Zhang ◽  
C. Benko ◽  
...  
Keyword(s):  
Optical Lattice ◽  
Dynamical Evolution ◽  
Many Body ◽  
Spin Coherence ◽  
Atomic Spin ◽  
Strongly Interacting ◽  
Optical Lattice Clock ◽  
Many Body Effects ◽  
Many Body Systems ◽  
Spin Measurements

Strongly interacting quantum many-body systems arise in many areas of physics, but their complexity generally precludes exact solutions to their dynamics. We explored a strongly interacting two-level system formed by the clock states in 87Sr as a laboratory for the study of quantum many-body effects. Our collective spin measurements reveal signatures of the development of many-body correlations during the dynamical evolution. We derived a many-body Hamiltonian that describes the experimental observation of atomic spin coherence decay, density-dependent frequency shifts, severely distorted lineshapes, and correlated spin noise. These investigations open the door to further explorations of quantum many-body effects and entanglement through use of highly coherent and precisely controlled optical lattice clocks.

Probing many-body spin interactions with an optical lattice clock

2012 ◽  
Author(s):  
A. M. Rey ◽  
M. J. Martin ◽  
M. D. Swallows ◽  
M. Bishof ◽  
C. Benko ◽  
...  
Keyword(s):  
Optical Lattice ◽  
Many Body ◽  
Spin Interactions ◽  
Optical Lattice Clock

THE UNIVERSAL EQUATIONS OF MOTION FOR NONLINEAR FIELDS IN DIFFERENT BASES DESCRIBING STRONGLY INTERACTING MANY-BODY SYSTEMS WITH TWO-BODY INTERACTIONS

1995 ◽  
Vol 09 (13n14) ◽  
pp. 1611-1637 ◽  
Author(s):  
J.M. DIXON ◽  
J.A. TUSZYŃSKI
Keyword(s):  
Plane Wave ◽  
Coherent Structures ◽  
Equations Of Motion ◽  
Quantum Field ◽  
Many Body ◽  
Field Equations ◽  
Strongly Interacting ◽  
Highly Nonlinear ◽  
Many Body Systems ◽  
Definition Of

A brief account of the Method of Coherent Structures (MCS) is presented using a plane-wave basis to define a quantum field. It is also demonstrated that the form of the quantum field equations, obtained by MCS, although highly nonlinear for many-body systems with two-body interactions, is independent of the basis of states used for the definition of the field.

scholarly journals Macroscopic quantum superpositions in highly excited strongly interacting many-body systems

2003 ◽  
Vol 67 (1) ◽  
Author(s):  
S. Yu. Kun ◽  
L. Benet ◽  
L. T. Chadderton ◽  
W. Greiner ◽  
F. Haas
Keyword(s):  
Many Body ◽  
Macroscopic Quantum ◽  
Strongly Interacting ◽  
Quantum Superpositions ◽  
Many Body Systems

scholarly journals Enhancing violations of Leggett-Garg inequalities in nonequilibrium correlated many-body systems by interactions and decoherence

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
J. J. Mendoza-Arenas ◽  
F. J. Gómez-Ruiz ◽  
F. J. Rodríguez ◽  
L. Quiroga
Keyword(s):  
Quantum Transport ◽  
Minimal Model ◽  
Analytical Study ◽  
Particle Interactions ◽  
Many Body ◽  
Strongly Interacting ◽  
Maximal Violation ◽  
Many Body Systems

AbstractWe identify different schemes to enhance the violation of Leggett-Garg inequalities in open many-body systems. Considering a nonequilibrium archetypical setup of quantum transport, we show that particle interactions control the direction and amplitude of maximal violation, and that in the strongly-interacting and strongly-driven regime bulk dephasing enhances the violation. Through an analytical study of a minimal model we unravel the basic ingredients to explain this decoherence-enhanced quantumness, illustrating that such an effect emerges in a wide variety of systems.

CAN ENTANGLEMENT BE EXTRACTED FROM MANY BODY SYSTEMS?

2007 ◽  
Vol 05 (01n02) ◽  
pp. 125-130
Author(s):  
GABRIELE DE CHIARA ◽  
ČASLAV BRUKNER ◽  
G. MASSIMO PALMA ◽  
ROSARIO FAZIO ◽  
VLATKO VEDRAL
Keyword(s):  
Information Theory ◽  
Heat Capacity ◽  
Magnetic Susceptibility ◽  
Quantum Information ◽  
Spin Chain ◽  
Optical Lattice ◽  
Quantum Information Theory ◽  
Many Body ◽  
Thermodynamical Properties ◽  
Many Body Systems

Some thermodynamical properties of solids, such as heat capacity and magnetic susceptibility, have recently been shown to be linked to the amount of entanglement in a solid. Until now, however, it was not clear whether this entanglement can be used as a resource in quantum information theory. Here we show that this entanglement is physical, demonstrating the principles of its extraction from a typical spin chain by scattering two particles off the system. Moreover, we show how to simulate this process using present-day optical lattice technology.

scholarly journals Polariton dynamics in strongly interacting quantum many-body systems

2020 ◽  
Vol 2 (2) ◽  
Author(s):  
A. Camacho-Guardian ◽  
K. Knakkergaard Nielsen ◽  
T. Pohl ◽  
G. M. Bruun
Keyword(s):  
Many Body ◽  
Strongly Interacting ◽  
Many Body Systems

scholarly journals PT-symmetric non-Hermitian quantum many-body system using ultracold atoms in an optical lattice with controlled dissipation

2020 ◽  
Vol 2020 (12) ◽  
Author(s):  
Yosuke Takasu ◽  
Tomoya Yagami ◽  
Yuto Ashida ◽  
Ryusuke Hamazaki ◽  
Yoshihito Kuno ◽  
...  
Keyword(s):  
Optical Lattice ◽  
Ultracold Atoms ◽  
Cold Atoms ◽  
Experimental Setup ◽  
Body System ◽  
Many Body ◽  
System Parameters ◽  
Atom Loss ◽  
Many Body Systems ◽  
Important System

Abstract We report our realization of a parity–time (PT)-symmetric non-Hermitian many-body system using cold atoms with dissipation. After developing a theoretical framework on PT-symmetric many-body systems using ultracold atoms in an optical lattice with controlled dissipation, we describe our experimental setup utilizing one-body atom loss as dissipation with special emphasis on calibration of important system parameters. We discuss loss dynamics observed experimentally.

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