scholarly journals Open quantum systems for quarkonia

2021 ◽  
pp. 2130010
Author(s):  
Xiaojun Yao
Keyword(s):  
Quantum System ◽  
Open Quantum System ◽  
Open Quantum Systems ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
Effective Field ◽  
Quantum Brownian Motion ◽  
Open Quantum ◽  
Ion Collisions ◽  
Quantum Optical

I review recent applications of the open quantum system framework in the understanding of quarkonium suppression in heavy-ion collisions, which has been used as a probe of the quark–gluon plasma for decades. The derivation of the Lindblad equations for quarkonium in both the quantum Brownian motion and the quantum optical limits and their semiclassical counterparts is explained. The hierarchy of time scales assumed in the derivation is justified from the separation of energy scales in nonrelativistic effective field theories of QCD. Physical implications of the open quantum system approach are also discussed. Finally, I list some open questions for future studies.

scholarly journals Quarkonium suppression in heavy-ion collisions: An open quantum system approach

2017 ◽  
Vol 96 (3) ◽  
Author(s):  
Nora Brambilla ◽  
Miguel A. Escobedo ◽  
Joan Soto ◽  
Antonio Vairo
Keyword(s):  
Quantum System ◽  
System Approach ◽  
Heavy Ion Collisions ◽  
Open Quantum System ◽  
Heavy Ion ◽  
Open Quantum ◽  
Ion Collisions

scholarly journals Quarkonium Production in Heavy Ion Collisions: From Open Quantum System to Transport Equation

2021 ◽  
Vol 1005 ◽  
pp. 121854
Author(s):  
Xiaojun Yao ◽  
Weiyao Ke ◽  
Yingru Xu ◽  
Steffen A. Bass ◽  
Thomas Mehen ◽  
...  
Keyword(s):  
Transport Equation ◽  
Quantum System ◽  
Heavy Ion Collisions ◽  
Open Quantum System ◽  
Heavy Ion ◽  
Open Quantum ◽  
Ion Collisions ◽  
Quarkonium Production

Lyapunov control on quantum systems

2014 ◽  
Vol 28 (30) ◽  
pp. 1430020 ◽  
Author(s):  
L. C. Wang ◽  
X. X. Yi
Keyword(s):  
Quantum System ◽  
Open Quantum System ◽  
Open Quantum Systems ◽  
Logic Gates ◽  
Quantum Systems ◽  
Open Quantum ◽  
Quantum Operations ◽  
Lyapunov Control ◽  
Decoherence Free Subspace ◽  
General Method

We review the scheme of quantum Lyapunov control and its applications into quantum systems. After a brief review on the general method of quantum Lyapunov control in closed and open quantum systems, we apply it into controlling quantum states and quantum operations. The control of a spin-1/2 quantum system, driving an open quantum system into its decoherence free subspace (DFS), constructing single qubit and two-qubit logic gates are taken to illustrate the scheme. The optimalization of the Lyapunov control is also reviewed in this article.

scholarly journals Charge transfer in a DNA molecule within a simple model of an open quantum system

2021 ◽  
pp. 1-26
Author(s):  
Anton Victorovich Syurakshin ◽  
Victor Dmitrievich Lakhno ◽  
Victor Yulievich Yushankhai
Keyword(s):  
Charge Transfer ◽  
Quantum System ◽  
Open Quantum System ◽  
Open Quantum Systems ◽  
Chem Phys ◽  
Open Quantum ◽  
Dna Molecule ◽  
Artificial Dna ◽  
Charged Carrier ◽  
A Charge

The quantum-mechanical model proposed earlier by Skourtis and Nitzan (J. of Chem. Phys. 119, (2003) 6271) to describe a charge transfer in a fragment of artificial DNA molecule has been numerically investigated. The current rationale for the model is carried out and values of its parameters are indicated. Within this model, the description of the transport of a hole carrier in DNA is based on solutions to the time-dependent Schrödinger equation including damping effects. The non-unitary dynamics of the hole carrier is treated by us within the framework of a theory of continuous quantum measurements by the environment in an open quantum system. Results of numerical analysis of the model are in a good agreement with experimental observations and demonstrate two different types of the charged carrier motion, presumably tunneling and incoherent hopping. The main concepts of the theory of decoherence and superselection for open quantum systems and the prospects for their application for further study of various mechanisms of motion of a charged carrier in DNA are briefly discussed.

scholarly journals Nonequilibrium evolution of quarkonium in medium

2022 ◽  
Vol 258 ◽  
pp. 01006
Author(s):  
Yukinao Akamatsu ◽  
Takahiro Miura
Keyword(s):  
Numerical Simulations ◽  
Quantum System ◽  
Quark Gluon Plasma ◽  
System Approach ◽  
Recent Progress ◽  
Open Quantum System ◽  
Gluon Plasma ◽  
Open Quantum

We review recent progress in open quantum system approach to the description of quarkonium in the quark-gluon plasma. A particular emphasis is put on the Lindblad equations for quarkonium and its numerical simulations.

scholarly journals Effective field theory calculations in open charm and charmonium production in media

2019 ◽  
Vol 202 ◽  
pp. 03002
Author(s):  
Miguel Ángel Escobedo Espinosa
Keyword(s):  
Open Quantum Systems ◽  
Heavy Ion ◽  
Effective Field ◽  
Relativistic Heavy Ion Collisions ◽  
Charmonium Production ◽  
Nuclear Modification Factor ◽  
Ion Collisions ◽  
Temperature Regimes ◽  
Modification Factor ◽  
Thermal Medium

Heavy quarkonium related observables are very useful to obtain information about the medium created in relativistic heavy ion collisions. The interaction of charmonium or bottomonium with the hot QCD medium created in these collisions can be efficiently described with the use of non-relativistic Effective Field Theories. In this proceedings, I will review recent progress in understanding quarkonium dynamics in a thermal medium with the use of potential non-relativistic QCD (pNRQCD). First, I will discuss the medium modifications of the decay width and the binding energy. Using pNRQCD power counting it is possible to identify in which temperature regimes a potential model can describe these modifications and what is the dominant physical process behind the thermal corrections in each case. After that, I will discuss the combination of pNRQCD with open quantum systems techniques. This allows making predictions about the nuclear modification factor that can be compared with experimental measurements.

ON THE DAMPING OF THE ANGULAR MOMENTUM OF A SPHERICAL HARMONIC OSCILLATOR AS A MODEL FOR HEAVY ION COLLISIONS

1990 ◽  
Vol 05 (09) ◽  
pp. 1773-1787 ◽  
Author(s):  
A. ISAR ◽  
A. SANDULESCU ◽  
W. SCHEID
Keyword(s):  
Angular Momentum ◽  
Harmonic Oscillator ◽  
Spherical Harmonic ◽  
Heavy Ion Collisions ◽  
Open Quantum Systems ◽  
Heavy Ion ◽  
Quantum Systems ◽  
Open Quantum ◽  
Ion Collisions ◽  
Explicit Expressions

In the frame of the Lindblad theory of open quantum systems, the spherical harmonic oscillator with opening operators linear in the coordinates and the momenta of the considered system is analyzed. Explicit expressions for the damping of the energy, angular momentum and its projection, including the coupling of the harmonic oscillator due to the environment, are obtained.

scholarly journals Quantum simulation of open quantum systems in heavy-ion collisions

2021 ◽  
Vol 104 (5) ◽  
Author(s):  
Wibe A. de Jong ◽  
Mekena Metcalf ◽  
James Mulligan ◽  
Mateusz Płoskoń ◽  
Felix Ringer ◽  
...  
Keyword(s):  
Heavy Ion Collisions ◽  
Open Quantum Systems ◽  
Quantum Simulation ◽  
Heavy Ion ◽  
Quantum Systems ◽  
Open Quantum ◽  
Ion Collisions
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