Atoms Trapped with Light Behave Like a Dissipative Quantum System

2021 ◽  
Vol 1 ◽  
Keyword(s):  
Quantum System ◽  
Optical Lattice ◽  
Ultracold Atoms ◽  
Many Body ◽  
First Time

A team of researchers from Japan experimentally realize, for the first time, a dissipative, parity-time symmetric, many-body quantum system from ultracold atoms trapped in an optical lattice.

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.

Gap solitons supported by an optical lattice in biased photorefractive crystals having both the linear and quadratic electro-optic effect

2020 ◽  
Vol 75 (8) ◽  
pp. 749-756
Author(s):  
Aavishkar Katti ◽  
Chittaranjan P. Katti
Keyword(s):  
Band Gap ◽  
Optical Lattice ◽  
Propagation Constant ◽  
Gap Soliton ◽  
Electro Optic ◽  
Quadratic Nonlinearities ◽  
Existence And Stability ◽  
Gap Solitons ◽  
Finite Band ◽  
First Time

AbstractWe investigate the existence and stability of gap solitons supported by an optical lattice in biased photorefractive (PR) crystals having both the linear and quadratic electro-optic effect. Such PR crystals have an interesting interplay between the linear and quadratic nonlinearities. Gap solitons are predicted for the first time in such novel PR media. Taking a relevant example (PMN-0.33PT), we find that the gap solitons in the first finite bandgap are single humped, positive and symmetric solitons while those in the second finite band gap are antisymmetric and double humped. The power of the gap soliton depends upon the value of the axial propagation constant. We delineate three power regimes and study the gap soliton profiles in each region. The gap solitons in the first finite band gap are not linearly stable while those in the second finite band gap are found to be stable against small perturbations. We study their stability properties in detail throughout the finite band gaps. The interplay between the linear and quadratic electro-optic effect is studied by investigating the spatial profiles and stability of the gap solitons for different ratios of the linear and quadratic nonlinear coefficients.

scholarly journals Efficient quantum gates and algorithms in an engineered optical lattice

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
A. H. Homid ◽  
M. Abdel-Aty ◽  
M. Qasymeh ◽  
H. Eleuch
Keyword(s):  
Analytical Model ◽  
Open System ◽  
Optical Lattice ◽  
Ultracold Atoms ◽  
Processing Time ◽  
Quantum Algorithms ◽  
Black Box ◽  
Quantum Gate ◽  
Quantum Gates

AbstractIn this work, trapped ultracold atoms are proposed as a platform for efficient quantum gate circuits and algorithms. We also develop and evaluate quantum algorithms, including those for the Simon problem and the black-box string-finding problem. Our analytical model describes an open system with non-Hermitian Hamiltonian. It is shown that our proposed scheme offers better performance (in terms of the number of required gates and the processing time) for realizing the quantum gates and algorithms compared to previously reported approaches.

scholarly journals Signatures of Many-Body Localization in a Controlled Open Quantum System

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Henrik P. Lüschen ◽  
Pranjal Bordia ◽  
Sean S. Hodgman ◽  
Michael Schreiber ◽  
Saubhik Sarkar ◽  
...  
Keyword(s):  
Quantum System ◽  
Open Quantum System ◽  
Many Body ◽  
Open Quantum

scholarly journals Driven-dissipative many-body pairing states for cold fermionic atoms in an optical lattice

2012 ◽  
Vol 14 (5) ◽  
pp. 055002 ◽  
Author(s):  
W Yi ◽  
S Diehl ◽  
A J Daley ◽  
P Zoller
Keyword(s):  
Optical Lattice ◽  
Many Body ◽  
Fermionic Atoms

Tonks–Girardeau gas of ultracold atoms in an optical lattice

Nature ◽  
2004 ◽  
Vol 429 (6989) ◽  
pp. 277-281 ◽  
Author(s):  
Belén Paredes ◽  
Artur Widera ◽  
Valentin Murg ◽  
Olaf Mandel ◽  
Simon Fölling ◽  
...  
Keyword(s):  
Optical Lattice ◽  
Ultracold Atoms
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