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Physical Review Letters
Volumn 112, Issue 4, 2014, Pages
Quantum Joule-Thomson effect in a saturated homogeneous bose gas
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EID: 84894490985     PISSN: 00319007     EISSN: 10797114     Source Type: Journal    
DOI: 10.1103/PhysRevLett.112.040403     Document Type: Article
Times cited : (63)
References (40)
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    • Since N ′ saturates for N > N c, as shown in Fig. 3, associating the critical point with a small but nonzero N 0 does not introduce any errors.
    • Since N ′ saturates for N > N c, as shown in Fig. 3, associating the critical point with a small but nonzero N 0 does not introduce any errors.
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    • This conclusion is also compatible with an earlier estimate based on analyzing just the shape of the thermal ToF profiles at ∼ 100 nK [17].
    • This conclusion is also compatible with an earlier estimate based on analyzing just the shape of the thermal ToF profiles at ∼ 100 nK [17].
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    • Our absolute atom-number calibration is obtained by measuring N c in a harmonic trap [15]. The systematic uncertainty in V is due to the inherent difficulties in imaging small and dense clouds. Note that it corresponds to about one CCD pixel uncertainty in the linear cloud size.
    • Our absolute atom-number calibration is obtained by measuring N c in a harmonic trap [15]. The systematic uncertainty in V is due to the inherent difficulties in imaging small and dense clouds. Note that it corresponds to about one CCD pixel uncertainty in the linear cloud size.
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    • N c could also be slightly reduced by weak disorder in the optical potential [27]. By directly imaging our trapping beams, we assess the disorder in our trap to be up to a few percent of U 0.
    • N c could also be slightly reduced by weak disorder in the optical potential [27]. By directly imaging our trapping beams, we assess the disorder in our trap to be up to a few percent of U 0.
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    • In an interacting gas the thermal phase-space density can actually drop below ρ c once the BEC forms [31-33], but for our parameters this effect is very small.
    • In an interacting gas the thermal phase-space density can actually drop below ρ c once the BEC forms [31-33], but for our parameters this effect is very small.
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    • We estimate that the total change in T due to the change in the interaction energy per particle could at most be ∼ 3 nK, which is comparable to our experimental data scatter. Moreover, note that for a > 0 the drop in the interaction energy should lead to slight heating rather than cooling of the gas.
    • We estimate that the total change in T due to the change in the interaction energy per particle could at most be ∼ 3 nK, which is comparable to our experimental data scatter. Moreover, note that for a > 0 the drop in the interaction energy should lead to slight heating rather than cooling of the gas.
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    • For a classical gas, c JT can be estimated, to within an order of magnitude, by using the van der Waals approximation for the equation of state.
    • For a classical gas, c JT can be estimated, to within an order of magnitude, by using the van der Waals approximation for the equation of state.
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