Real-Time Quantum Dynamics of a Single Spin 1/2 Coupled to a Spin Bath

Marta L. Guerra; Hans De Raedt; M.A. Novotny

Real-Time Quantum Dynamics of a Single Spin 1/2 Coupled to a Spin Bath

Marta L. Guerra
, Hans De Raedt
, M.A. Novotny

Zernike Institute for Advanced Materials

Research output: Chapter in Book/Report/Conference proceeding › Chapter › Academic

2 Citations (Scopus)

236 Downloads (Pure)

Abstract

We performed real-time dynamics of a spin ½ quantum system that is coupled to a bath of N quantum spin ½ particles. The quantities we study are the time dependence of the magnetization and of the quantum purity, P(t). If the spins that constitute the bath have no interactions with each other, the result is compared to a recent theoretical result. We also present simulations to study the effect of interactions between the bath spins. In particular, we analyze how P(t) approaches its asymptotic value for large t and N.

Original language	English
Title of host publication	Proceedings of the 24th Workshop on Computer Simulation Studies in Condensed Matter Physics (CSP2011)
Publisher	University of Groningen, The Zernike Institute for Advanced Materials
Pages	33-36
Number of pages	4
Volume	15
Publication status	Published - 2011
Event	24th Workshop on Computer Simulation Studies in Condensed Matter Physics (CSP2011) - Duration: 1-Jan-2011 → …

Conference

Conference	24th Workshop on Computer Simulation Studies in Condensed Matter Physics (CSP2011)
Period	01/01/2011 → …

Keywords

Decoherence
Quantum Purity
Spin Bath
Quantum Dynamics

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title = "Real-Time Quantum Dynamics of a Single Spin 1/2 Coupled to a Spin Bath",

abstract = "We performed real-time dynamics of a spin ½ quantum system that is coupled to a bath of N quantum spin ½ particles. The quantities we study are the time dependence of the magnetization and of the quantum purity, P(t). If the spins that constitute the bath have no interactions with each other, the result is compared to a recent theoretical result. We also present simulations to study the effect of interactions between the bath spins. In particular, we analyze how P(t) approaches its asymptotic value for large t and N.",

keywords = "Decoherence, Quantum Purity, Spin Bath, Quantum Dynamics",

author = "Guerra, \{Marta L.\} and Raedt, \{Hans De\} and M.A. Novotny",

note = "Relation: http://www.rug.nl/zernike/ Rights: University of Groningen, Zernike Institute for Advanced Materials; 24th Workshop on Computer Simulation Studies in Condensed Matter Physics (CSP2011) ; Conference date: 01-01-2011",

year = "2011",

language = "English",

volume = "15",

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Guerra, ML, Raedt, HD & Novotny, MA 2011, Real-Time Quantum Dynamics of a Single Spin 1/2 Coupled to a Spin Bath. in Proceedings of the 24th Workshop on Computer Simulation Studies in Condensed Matter Physics (CSP2011). vol. 15, University of Groningen, The Zernike Institute for Advanced Materials, pp. 33-36, 24th Workshop on Computer Simulation Studies in Condensed Matter Physics (CSP2011), 01/01/2011.

Real-Time Quantum Dynamics of a Single Spin 1/2 Coupled to a Spin Bath. / Guerra, Marta L.; Raedt, Hans De; Novotny, M.A.
Proceedings of the 24th Workshop on Computer Simulation Studies in Condensed Matter Physics (CSP2011). Vol. 15 University of Groningen, The Zernike Institute for Advanced Materials, 2011. p. 33-36.

Research output: Chapter in Book/Report/Conference proceeding › Chapter › Academic

TY - CHAP

T1 - Real-Time Quantum Dynamics of a Single Spin 1/2 Coupled to a Spin Bath

AU - Guerra, Marta L.

AU - Raedt, Hans De

AU - Novotny, M.A.

N1 - Relation: http://www.rug.nl/zernike/ Rights: University of Groningen, Zernike Institute for Advanced Materials

PY - 2011

Y1 - 2011

N2 - We performed real-time dynamics of a spin ½ quantum system that is coupled to a bath of N quantum spin ½ particles. The quantities we study are the time dependence of the magnetization and of the quantum purity, P(t). If the spins that constitute the bath have no interactions with each other, the result is compared to a recent theoretical result. We also present simulations to study the effect of interactions between the bath spins. In particular, we analyze how P(t) approaches its asymptotic value for large t and N.

AB - We performed real-time dynamics of a spin ½ quantum system that is coupled to a bath of N quantum spin ½ particles. The quantities we study are the time dependence of the magnetization and of the quantum purity, P(t). If the spins that constitute the bath have no interactions with each other, the result is compared to a recent theoretical result. We also present simulations to study the effect of interactions between the bath spins. In particular, we analyze how P(t) approaches its asymptotic value for large t and N.

KW - Decoherence

KW - Quantum Purity

KW - Spin Bath

KW - Quantum Dynamics

M3 - Chapter

VL - 15

SP - 33

EP - 36

BT - Proceedings of the 24th Workshop on Computer Simulation Studies in Condensed Matter Physics (CSP2011)

PB - University of Groningen, The Zernike Institute for Advanced Materials

T2 - 24th Workshop on Computer Simulation Studies in Condensed Matter Physics (CSP2011)

Y2 - 1 January 2011

ER -

Real-Time Quantum Dynamics of a Single Spin 1/2 Coupled to a Spin Bath

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