Vacuum spin squeezing

Hu, Jiazhong; Chen, Wenlan; Vendeiro, Zachary; Urvoy, Alban; Braverman, Boris; Vuletić, Vladan

doi:10.1103/physreva.96.050301

Cited by 49 publications

(53 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Long-range exchange interactions mediated by the optical cavity give rise to a frequency shift that depends dispersively on cavity detuning, and linearly on atomic population inversion [41,42]. These interactions lead to so-called one-axis-twisting dynamics, and a many-body energy gap.…”

Section: Cavity Pullingmentioning

confidence: 99%

Frequency Measurements of Superradiance from the Strontium Clock Transition

et al. 2018

View full text Add to dashboard Cite

We present the first characterization of the spectral properties of superradiant light emitted from the ultranarrow, 1-mHz-linewidth optical clock transition in an ensemble of cold 87 Sr atoms. Such a light source has been proposed as a next-generation active atomic frequency reference, with the potential to enable high-precision optical frequency references to be used outside laboratory environments. By comparing the frequency of our superradiant source to that of a state-of-the-art cavity-stabilized laser and optical lattice clock, we observe a fractional Allan deviation of 6.7ð1Þ × 10 −16 at 1 s of averaging, establish absolute accuracy at the 2-Hz (4 × 10 −15 fractional frequency) level, and demonstrate insensitivity to key environmental perturbations.

show abstract

Section: Cavity Pullingmentioning

confidence: 99%

Frequency Measurements of Superradiance from the Strontium Clock Transition

et al. 2018

View full text Add to dashboard Cite

show abstract

“…We note that the scaling achievable with TSS is equivalent to that predicted by introducing an additional drive term in Ref. [21]. However, the improvement in that case is only a byproduct of enhancing the rate at which the squeezing dynamics occur, at the cost of adding further systematic effects generated by the additional drive.…”

mentioning

confidence: 66%

Robust Spin Squeezing via Photon-Mediated Interactions on an Optical Clock Transition

et al. 2018

View full text Add to dashboard Cite

Cavity QED is a promising avenue for the deterministic generation of entangled and spin-squeezed states for quantum metrology. One archetypal scheme generates squeezing via collective one-axis twisting interactions. However, we show that in implementations using optical transitions in long-lived atoms the achievable squeezing is fundamentally limited by collectively enhanced emission into the cavity mode which is generated in parallel with the cavity-mediated spin-spin interactions. We propose an alternative scheme which generates a squeezed state that is protected from collective emission, and investigate its sensitivity to realistic sources of experimental noise and imperfections.

show abstract

“…These studies have shown that these systems have steady states with very rich phase diagrams [11,14], can undergo dynamical phase transitions [7,18] including self-organized criticality [19] and bistability [20][21][22], as well as emergent quantum synchronization [23][24][25], and for some parameter regimes in the thermodynamic limit, steady states characterized by oscillating observables [15,[26][27][28] in close connection with recently proposed time-crystals [9,29,30]. Spin squeezing has also been a prominent quantity of study in collective systems with strong dissipation [31][32][33][34][35][36].…”

Section: Introductionmentioning

confidence: 93%

Driven-dissipative quantum dynamics in ultra-long-lived dipoles in an optical cavity

et al. 2019

View full text Add to dashboard Cite

We study the quantum dynamics of many-body arrays of two-level atoms in a driven cavity subject to collective decay and interactions mediated by the cavity field. We work in the bad cavity limit accessible, for example, using long-lived electronic clock states of alkaline earth atoms, for which the bare atomic linewidth is much less than the cavity linewidth. In the absence of interactions, our system reduces to previously studied models of collective fluorescence. We show that while interactions do not qualitatively change the steady state properties, they lead to a drastic change in the dynamical properties. We find that, for some interval of driving strengths, the system shows two very distinct types of transient behaviors that depend on the initial state of the system. In particular, there is a parameter regime where the system features oscillatory dynamics with a period of oscillation that becomes much shorter than the duration of the overall transient dynamics as the atom number increases. We use both mean field and exact numerical calculations of the quantum system to investigate the dynamics.

show abstract

Vacuum spin squeezing

Cited by 49 publications

References 57 publications

Frequency Measurements of Superradiance from the Strontium Clock Transition

Frequency Measurements of Superradiance from the Strontium Clock Transition

Robust Spin Squeezing via Photon-Mediated Interactions on an Optical Clock Transition

Driven-dissipative quantum dynamics in ultra-long-lived dipoles in an optical cavity

Contact Info

Product

Resources

About