We solve for the decoherence dynamics of two models in which a simple qubit or Central Spin couples to a bath of spins; the bath is made from a chain of spins. In model 1, the bath spins are Ising spins; in Model 2, they are coupled by transverse spin-spin interactions, and the chain supports spin waves. We look at (i) the case where the Hamiltonian is static, with a constant system/bath coupling, and (ii) where this coupling varies in time.

arXiv:2405.03795May 6, 20240 citations

Progress of Theoretical Physics

Decoherence of a Spin Qubit Coupled with a Spin Chain

T. Itakura

Published Jul 1, 2005• 0 citations

Publisher

Abstract

In this report, we examine the relaxation phenomena of a spin qubit coupled to a spin chain with a 1/r2 interaction.

DOI: 10.1143/ptp.114.275

Related papers

Decoherence of a Spin Qubit Coupled with Spin Chain

Toshifumi Itakura

In this report, we examine the relaxation phenomena of a spin qubit coupled to a spin chain with a $1/r^2$ interaction.In this report, we examine the relaxation phenomena of a spin qubit coupled to a spin chain with a $1/r^2$ interaction.

arXiv:cond-mat/0701036Jan 2, 20070 citations

The decoherence of coupled spin qubits system

Toshifumi Itakura

In this report, we examine the decoherence of a spin qubits system coupled to counted spin chain with a $1/r^2$ interaction by using influence functional. We also examine the time evolution of density matrix numerically when environment is Gaussian noise.In this report, we examine the decoherence of a spin qubits system coupled to counted spin chain with a $1/r^2$ interaction by using influence functional. We also examine the time evolution of density matrix numerically when environment is Gaussian noise.

arXiv:0805.1432May 10, 20080 citations

Decoherence Effect on Quantum Correlation and Entanglement in a Two-qubit Spin Chain

Mohammad Reza Pourkarimi, Majid Rahnama, Hossein Rooholamini

arXiv:1211.5907International Journal of Theoretical PhysicsAug 21, 201425 citations

Decoherence from spin environment: Role of the Dzyaloshinsky-Moriya interaction

W. W. Cheng, Jun‐Ming Liu

We study the time evolution of decoherence factor of two spin qubits and qutrits coupled to an $XY$ spin chain with Dzyaloshinsky-Moriya (DM) interaction environment. The dynamical process of the decoherence is numerically and analytically investigated. We find that the DM interaction can enhance slightly the decay of the decoherence factor in the weak-coupling region. However, in the strong-coupling region, the decoherence factor is very sensitive to the DM interaction.We study the time evolution of decoherence factor of two spin qubits and qutrits coupled to an $XY$ spin chain with Dzyaloshinsky-Moriya (DM) interaction environment. The dynamical process of the decoherence is numerically and analytically investigated. We find that the DM interaction can enhance slightly the decay of the decoherence factor in the weak-coupling region. However, in the strong-coupling region, the decoherence factor is very sensitive to the DM interaction.

Physical Review AMay 15, 200956 citations

Decoherence of coupled spin qubits due to charge fluctuations

Guy Ramon, Xuedong Hu

Bulletin of the American Physical SocietyMar 13, 20080 citations

Two Toy Spin Chain Models of Decoherence

Peng Zhu

arXiv:2405.03795May 6, 20240 citations

In this report, we examine the relaxation phenomena of a spin qubit coupled to a spin chain with a

1/r^2

interaction.

In this report, we examine the decoherence of a spin qubits system coupled to counted spin chain with a

1/r^2

interaction by using influence functional. We also examine the time evolution of density matrix numerically when environment is Gaussian noise.

We study the time evolution of decoherence factor of two spin qubits and qutrits coupled to an

XY

spin chain with Dzyaloshinsky-Moriya (DM) interaction environment. The dynamical process of the decoherence is numerically and analytically investigated. We find that the DM interaction can enhance slightly the decay of the decoherence factor in the weak-coupling region. However, in the strong-coupling region, the decoherence factor is very sensitive to the DM interaction.