Realization of a single Josephson junction for Bose–Einstein condensates

Gati, R.; Albiez, M.; Fölling, Jonas; Hemmerling, Boerge; Oberthaler, Markus K.

doi:10.1007/s00340-005-2059-z

Cited by 88 publications

(146 citation statements)

References 20 publications

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“…Bidirectional couplings between spatially separated condensates have already been realised [42,43]. Furthermore, electron beams have successfully been used to introduce loss in single sites of optical lattices [44], and an influx of atoms can be achieved by exploiting different electronic states of the atoms to transfer them from a reservoir into one well of a trap [45].…”

Section: Discussionmentioning

confidence: 99%

Spectral singularities in ${\mathcal P}{\mathcal T}$-symmetric Bose–Einstein condensates

Heiss¹,

Cartarius²,

Main³

2013

J. Phys. A: Math. Theor.

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Abstract. We consider the model of a PT -symmetric Bose-Einstein condensate in a delta-functions double-well potential.We demonstrate that analytic continuation of the primarily non-analytic term |ψ| 2 ψ -occurring in the underlying Gross-Pitaevskii equation -yields new branch points where three levels coalesce. We show numerically that the new branch points exhibit the behaviour of exceptional points of second and third order. A matrix model which confirms the numerical findings in analytic terms is given.

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Section: Discussionmentioning

confidence: 99%

Spectral singularities in ${\mathcal P}{\mathcal T}$-symmetric Bose–Einstein condensates

Heiss¹,

Cartarius²,

Main³

2013

J. Phys. A: Math. Theor.

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“…where equation (5) has been inserted for R int . Therefore, the terminal voltage is the average energy carried by each atom as it leaves the battery.…”

Section: Thévenin Equivalent Circuitmentioning

confidence: 99%

Experimental demonstration of an atomtronic battery

2017

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Operation of an atomtronic battery is demonstrated where a finite-temperature Bose-Einstein condensate stored in one half of a double-well potential is coupled to an initially empty load well that is impedance matched by a resonant terminator beam. The atom number and temperature of the condensate are monitored during the discharge cycle, and are used to calculate fundamental properties of the battery. The discharge behavior is analyzed according to a Thévenin equivalent circuit that contains a finite internal resistance to account for dissipation in the battery. Battery performance at multiple discharge rates is characterized by the peak power output, and the current and energy capacities of the system.

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“…E j is obtained from numerical calculations using independently measured trap parameters and atom numbers. It is important to note that the recently developed improved two mode model [9] is used for these calculations because it leads to quantitative agreement between theoretical predictions and experimental measurements of dynamical quantities [16]. The solid line corresponds to the theoretical prediction of the classical model [Eq.…”

mentioning

confidence: 99%

Noise Thermometry with Two Weakly Coupled Bose-Einstein Condensates

et al. 2006

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Here we report on the experimental investigation of thermally induced fluctuations of the relative phase between two Bose-Einstein condensates which are coupled via tunneling. The experimental control over the coupling strength and the temperature of the thermal background allows for the quantitative analysis of the phase fluctuations. Furthermore, we demonstrate the application of these measurements for thermometry in a regime where standard methods fail. With this we confirm that the heat capacity of an ideal Bose gas deviates from that of a classical gas as predicted by the third law of thermodynamics.

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Realization of a single Josephson junction for Bose–Einstein condensates

Cited by 88 publications

References 20 publications

Spectral singularities in ${\mathcal P}{\mathcal T}$-symmetric Bose–Einstein condensates

Spectral singularities in ${\mathcal P}{\mathcal T}$-symmetric Bose–Einstein condensates

Experimental demonstration of an atomtronic battery

Noise Thermometry with Two Weakly Coupled Bose-Einstein Condensates

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