Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

International Journal of Modern Physics B

Dynamics of Spin Squeezing in Coupled Two Mode Bose–Einstein Condensates

Aranya B. Bhattacherjee, Vikash Ranjan, Man Mohan

Published May 20, 2003• 4 citations
Publisher

Abstract

We examine the effect of the phase of the external light fields on the dynamics of spin fluctuations in a coupled two-component Bose–Einstein condensates. We discover that the phase of the coherent coupling between the two components to be an easily tunable experimental parameter that can conveniently manipulate the spin squeezing in our given system.

DOI
10.1142/s0217979203018478

Related papers

Storage of Spin Squeezing in a Two-Component Bose-Einstein Condensate

Guangri Jin, Sang Wook Kim

A simple scheme for storage of spin squeezing in a two-component Bose-Einstein condensate is investigated by considering rapidly turning-off the external field at a time that maximal spin squeezing occurs. We show that strong reduction of spin fluctuation can be maintained in a nearly fixed direction. We explain the underlying physics using the phase model and present analytical expressions of the maximal-squeezing time and the corresponding squeezing parameter.

arXiv:0710.0110•Physical Review Letters•Oct 25, 2007•62 citations

Effect of spatial dynamics on spin squeezing in two-component Bose-Einstein condensates

Sulakshana Thanvanthri, Zachary Dutton

We discuss the effect of spatial dynamics in two-component Bose-Einstein condensates on spin squeezing and transfer to squeezed light. We also present a general treatment of squeezing transfer from atomic spins to light fields.

Frontiers in Optics•Jan 1, 2006•0 citations

Spin squeezing in a spin-orbit-coupled Bose-Einstein condensate

Li Chen, Yunbo Zhang, Han Pu

We study the spin squeezing in a spin-1/2 Bose-Einstein condensates (BEC) with Raman-induced spin-orbit coupling (SOC). Under the condition of two-photon resonance and weak Raman coupling strength, the system possesses two degenerate ground states, using which we construct an effective two-mode model. The Hamiltonian of the two-mode model takes the form of the one-axis-twisting Hamiltonian, which is known to generate spin squeezing. More importantly, we show that the SOC provides a convenient control knob to adjust the spin nonlinearity responsible for spin squeezing. Specifically, the spin nonlinearity strength can be tuned to be comparable to the two-body density-density interaction, and hence is much larger than the intrinsic spin-dependent interaction strength in conventional two-component BEC systems such as $^{87}\mathrm{Rb}$ and $^{23}\mathrm{Na}$ in the absence of the SOC. We confirm the spin squeezing by carrying out a fully beyond-mean-field numerical calculation using the truncated Wigner method. Additionally, the experimental implementation is also discussed.

arXiv:2005.08532•Physical Review A•Aug 18, 2020•13 citations

manipulation of spin squeezing condensate via electromagnetically induced transparency

Song-Song, LI ., Ji-Bing +3 more

We propose a scheme to coherently control spin squeezing of atomic Bose-Einstein condensate （BEC） via the technique of electromagnetically induced transparency （EIT）. We study quantum dynamics of the mean spin vector and spin squeezing. It is shown that the mean spin vector and spin squeezing of the BEC can be controlled and manipulated by adjusting the external coupling fields or/and internal nonlinear interactions of the BEC. It is indicated that the spin squeezing can be generated rapidly in the dynamical process and maintained in a long time interval. It is found that a larger effective Rabi coupling between atoms and lasers can produce a stronger spin squeezing, and the squeezing can maintain a longer time interval.

物理学前沿：英文版•Jan 1, 2013•0 citations

Coherent manipulation of spin squeezing in atomic Bose-Einstein condensate via electromagnetically induced transparency

Song-Song Li, Ji-Bing Yuan, Le‐Man Kuang

We propose a scheme to coherently control spin squeezing of atomic Bose-Einstein condensate (BEC) via the technique of electromagnetically induced transparency (EIT). We study quantum dynamics of the mean spin vector and spin squeezing. It is shown that the mean spin vector and spin squeezing of the BEC can be controlled and manipulated by adjusting the external coupling fields or/and internal nonlinear interactions of the BEC. It is indicated that the spin squeezing can be generated rapidly in the dynamical process and maintained in a long time interval. It is found that a larger effective Rabi coupling between atoms and lasers can produce a stronger spin squeezing, and the squeezing can maintain a longer time interval.

Frontiers of Physics•Feb 1, 2013•16 citations

Spatial dynamics and spin squeezing in Bose-Einstein condensates

Sulakshana Thanvanthri, Zachary Dutton

We develop a cumulant based formalism to deterministically calculate the lowest order quantum fluctuations of a two-component Bose-Einstein condensate. We use this to study spin squeezing induced by the atom-atom interaction nonlinearity. Our formalism naturally accounts for the multimode spatial description of the condensate, extending previous spin squeezing work which assumed a single spatial mode. We study spin squeezing in both the miscible and immiscible (phase separating) regimes for the scattering lengths. In the miscible regime, we find the squeezing parameter deviates very little from the single spatial mode approach, while in the phase separating regime, we find the squeezing is slightly reduced, though significant squeezing still occurs.

Physical Review A•Feb 21, 2007•10 citations
We examine the effect of the phase of the external light fields on the dynamics of spin fluctuations in a coupled two-component Bose–Einstein condensates. We discover that the phase of the coherent coupling between the two components to be an easily tunable experimental parameter that can conveniently manipulate the spin squeezing in our given system.
We study the spin squeezing in a spin-1/2 Bose-Einstein condensates (BEC) with Raman-induced spin-orbit coupling (SOC). Under the condition of two-photon resonance and weak Raman coupling strength, the system possesses two degenerate ground states, using which we construct an effective two-mode model. The Hamiltonian of the two-mode model takes the form of the one-axis-twisting Hamiltonian, which is known to generate spin squeezing. More importantly, we show that the SOC provides a convenient control knob to adjust the spin nonlinearity responsible for spin squeezing. Specifically, the spin nonlinearity strength can be tuned to be comparable to the two-body density-density interaction, and hence is much larger than the intrinsic spin-dependent interaction strength in conventional two-component BEC systems such as 87Rb^{87}\mathrm{Rb}87Rb and 23Na^{23}\mathrm{Na}23Na in the absence of the SOC. We confirm the spin squeezing by carrying out a fully beyond-mean-field numerical calculation using the truncated Wigner method. Additionally, the experimental implementation is also discussed.
We propose a scheme to coherently control spin squeezing of atomic Bose-Einstein condensate （BEC） via the technique of electromagnetically induced transparency （EIT）. We study quantum dynamics of the mean spin vector and spin squeezing. It is shown that the mean spin vector and spin squeezing of the BEC can be controlled and manipulated by adjusting the external coupling fields or/and internal nonlinear interactions of the BEC. It is indicated that the spin squeezing can be generated rapidly in the dynamical process and maintained in a long time interval. It is found that a larger effective Rabi coupling between atoms and lasers can produce a stronger spin squeezing, and the squeezing can maintain a longer time interval.
We propose a scheme to coherently control spin squeezing of atomic Bose-Einstein condensate (BEC) via the technique of electromagnetically induced transparency (EIT). We study quantum dynamics of the mean spin vector and spin squeezing. It is shown that the mean spin vector and spin squeezing of the BEC can be controlled and manipulated by adjusting the external coupling fields or/and internal nonlinear interactions of the BEC. It is indicated that the spin squeezing can be generated rapidly in the dynamical process and maintained in a long time interval. It is found that a larger effective Rabi coupling between atoms and lasers can produce a stronger spin squeezing, and the squeezing can maintain a longer time interval.
We develop a cumulant based formalism to deterministically calculate the lowest order quantum fluctuations of a two-component Bose-Einstein condensate. We use this to study spin squeezing induced by the atom-atom interaction nonlinearity. Our formalism naturally accounts for the multimode spatial description of the condensate, extending previous spin squeezing work which assumed a single spatial mode. We study spin squeezing in both the miscible and immiscible (phase separating) regimes for the scattering lengths. In the miscible regime, we find the squeezing parameter deviates very little from the single spatial mode approach, while in the phase separating regime, we find the squeezing is slightly reduced, though significant squeezing still occurs.