RF spectroscopy in a resonant RF-dressed trap

Easwaran, Raghavan K.; Longchambon, Laurent; Pottie, Paul-Eric; Lorent, V.; Perrin, Hélène; Garraway, B. M.

doi:10.1088/0953-4075/43/6/065302

Cited by 23 publications

(34 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With these figures, the criterion µ 3D <hω z requires an atom number in the quantum gas below 10 5 , which is easy to meet while keeping a good signal to noise ratio for imaging. Moreover, this vertical oscillation frequency corresponds to a temperature of 115 nK, which can easily be reached by forcing evaporation in the dressed trap with a second, weak, rf field [30][31][32]. Both the superfluid and the thermal fractions will then be in the quasi-2D regime, which makes this trap well suited for a study of the BKT physics [11].…”

Section: A Very Anisotropic Dressed Magnetic Trapmentioning

confidence: 99%

“…The magnetic gradient was measured previously [27]. While the rf frequency is very well known, the Rabi coupling experienced by the atoms can be measured in situ with a resolution of 0.5 kHz by rf spectroscopy [32,33]. The number of atoms remaining in the dressed trap is recorded as a function of the frequency of a second, weak, rf field, which induces resonant spin flips to an un-trapped dressed state when its frequency is equal to the Rabi coupling 0 /(2π) at the position of the atoms, see for example figure 3(b).…”

Section: Experimental Implementation and Characterizationmentioning

confidence: 99%

See 1 more Smart Citation

A two-dimensional quantum gas in a magnetic trap

et al. 2013

Self Cite

View full text Add to dashboard Cite

We present the first experimental realization of a two-dimensional quantum gas in a purely magnetic trap dressed by a radio frequency field in the presence of gravity. The resulting potential is extremely smooth and very close to harmonic in the two-dimensional plane of confinement. We fully characterize the trap and demonstrate the confinement of a quantum gas to two dimensions. The trap geometry can be modified to a large extent, in particular in a dynamical way. Taking advantage of this possibility, we study the monopole and the quadrupole modes of a two-dimensional Bose gas.

show abstract

Section: A Very Anisotropic Dressed Magnetic Trapmentioning

confidence: 99%

Section: Experimental Implementation and Characterizationmentioning

confidence: 99%

A two-dimensional quantum gas in a magnetic trap

et al. 2013

Self Cite

View full text Add to dashboard Cite

show abstract

“…B 1 (t), has frequency ω 1 and coupling strength |Ω 1 |, with other parameters like polarization considered same as B 0 (t). In RWDS approach, as used earlier [22], the ratio of the coupling strengths is assumed to be 'relatively small' (Ω 1 /Ω 0 → 0), and hence for k = 1. An appropriate amplitude envelope G(ω) was used, which has a variable strength of the positive component ω k=+1 while having the strength of the negative component ω k=−1 zero.…”

Section: A Comparison Of Mmft With Other Approachesmentioning

confidence: 99%

A Floquet formalism for the interaction of magnetically trapped atoms with rf fields

Chakraborty

Mishra

2017

J. Phys. B: At. Mol. Opt. Phys.

View full text Add to dashboard Cite

A many mode Floquet theory (MMFT) formalism is applied to study the interaction of a polychromatic rf-field with cold atoms trapped in a quadrupole magnetic trap. In this work, the validity of MMFT approach is first established by comparing its results with those of the previously used formalisms for the cases of single and two frequency rf-fields. We have then used the MMFT formalism to calculate the eigen-energies and transition probabilities for atoms in the quadrupole trap and interacting with a polychromatic rf-field. This composite atom-field system has shown some exquisite features such as lattice like periodic variation in the eigen-energies and large two-photon transition probabilities between the atomic states. This work thus predicts the generation of a lattice type atom trapping potential using polychromatic rf-field, which can be controlled by varying the rf-field parameters.

show abstract

“…In turn, this has resulted in the theoretical framework presented here, which is applicable to a wide range of systems dressed by multiple frequencies. Transitions in atoms in RF-dressed potentials have been calculated in previous work, though restricted to a single dressing frequency [29][30][31]. Moreover, only first-order transitions were considered in [29,30] and higher-order transitions were calculated only for selected polarizations in [31].…”

Section: Introductionmentioning

confidence: 99%

Probing multiple-frequency atom-photon interactions with ultracold atoms

et al. 2019

View full text Add to dashboard Cite

We dress atoms with multiple-radiofrequency (RF) fields and investigate the spectrum of transitions driven by an additional probe field. A complete theoretical description of this rich spectrum is presented, in which we find allowed transitions and determine their amplitudes using the resolvent formalism. Experimentally, we observe transitions up to sixth order in the probe field using RF spectroscopy of Bose-Einstein condensates trapped in single-and multiple-RF-dressed potentials. We find excellent agreement between theory and experiment, including the prediction and verification of previously unobserved transitions, even in the single-RF case.

show abstract

RF spectroscopy in a resonant RF-dressed trap

Cited by 23 publications

References 20 publications

A two-dimensional quantum gas in a magnetic trap

A two-dimensional quantum gas in a magnetic trap

A Floquet formalism for the interaction of magnetically trapped atoms with rf fields

Probing multiple-frequency atom-photon interactions with ultracold atoms

Contact Info

Product

Resources

About