Heisenberg-scaled magnetometer with dipolar spin-1 condensates

Xing, Haijun; Wang, Anbang; Tan, Qing-Shou; Zhang, Wenxian; Yi, Su

doi:10.1103/physreva.93.043615

Cited by 32 publications

(28 citation statements)

References 63 publications

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“…Despite SMD can generate the desired input state, it sensitively depends on the control of evolution time and these states are always not steady. In contrast, driving system through QPTs can deterministically generate the entangled states [37,39,40,[58][59][60]74]. Recently, entanglement generation by driving through QPTs has been realized in 87 Rb spinor condensate [59,60,62].…”

Section: B Lsv Test Via Driving Through Quantum Phase Transitionsmentioning

confidence: 99%

Entanglement-enhanced test proposal for local Lorentz-symmetry violation via spinor atoms

Zhuang¹,

Huang²,

Lee³

2022

Preprint

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Section: B Lsv Test Via Driving Through Quantum Phase Transitionsmentioning

confidence: 99%

Entanglement-enhanced test proposal for local Lorentz-symmetry violation via spinor atoms

Zhuang¹,

Huang²,

Lee³

2022

Preprint

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“…Up to now, studies of nonlinear atomic interferometer with spinor BECs have focused mainly on s -wave contact interaction 27 – 29 . According to the recent experimental and theoretical observation in 23 Na and 87 Rb atoms, the magnetic dipole-dipole interactions (MDDIs) are indeed not negligible for these spinor condensates 26 , 30 – 39 . For example, in 87 Rb atoms, the magnitude of the dipolar energy can be as large as 10% of the spin-exchange energy 35 , 36 .…”

Section: Introductionmentioning

confidence: 98%

Effects of dipolar interactions on the sensitivity of nonlinear spinor-BEC interterometry

Tan

Xie

Kuang

2018

Sci Rep

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We consider the effects of dipole-dipole interactions on a nonlinear interferometer with spin-1 Bose-Einstein condensates. Compared with the traditional atomic SU(1,1) interferometer, the shot-noise phase sensitivity can be beaten with respect to the input total average number of particles; and the improved sensitivity depends on the effective strength of the dipolar interaction via modifying the trapping geometry. It indicates that the best performance of the interferometer is achieved with highly oblate trap potential. The Bayesian phase estimation strategy is explored to extract the phase information. We show that the Cramér-Rao phase uncertainly bound can saturate, when the ideal dis-entangle scheme is applied. The phase average of the phase sensitivity is also discussed.

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“…This process does not require accurate control of qubits. Moreover, this process is protected by symmetry, i.e., nonadiabatic transitions from even-parity energy eigenstates to odd-parity energy eigenstates do not take place because of parity conservation due to spin-flip symmetry [36][37][38][39]. This suppression of nonadiabatic transitions protects the macroscopic entanglement from spontaneous symmetry breaking.…”

Section: Introductionmentioning

confidence: 99%

Quantum metrology based on symmetry-protected adiabatic transformation: imperfection, finite time duration, and dephasing

Hatomura

Yoshinaga²,

Matsuzaki³

et al. 2022

New J. Phys.

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The aim of quantum metrology is to estimate target parameters as precisely as possible. In this paper, we consider quantum metrology based on symmetry-protected adiabatic transformation. We introduce a ferromagnetic Ising model with a transverse field as a probe and consider the estimation of a longitudinal field. Without the transverse field, the ground state of the probe is given by the Greenberger-Horne-Zeilinger state, and thus the Heisenberg limit estimation of the longitudinal field can be achieved through parity measurement. In our scheme, full information of the longitudinal field encoded on parity is exactly mapped to global magnetization by symmetry-protected adiabatic transformation, and thus the parity measurement can be replaced with global magnetization measurement. Moreover, this scheme requires neither accurate control of individual qubits nor that of interaction strength. We discuss the effects of the finite transverse field and nonadiabatic transitions as imperfection of adiabatic transformation. By taking into account finite time duration for state preparation, sensing, and readout, we also compare performance of the present scheme with a classical scheme in the absence and presence of dephasing.

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Heisenberg-scaled magnetometer with dipolar spin-1 condensates

Cited by 32 publications

References 63 publications

Entanglement-enhanced test proposal for local Lorentz-symmetry violation via spinor atoms

Entanglement-enhanced test proposal for local Lorentz-symmetry violation via spinor atoms

Effects of dipolar interactions on the sensitivity of nonlinear spinor-BEC interterometry

Quantum metrology based on symmetry-protected adiabatic transformation: imperfection, finite time duration, and dephasing

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