Dissipative phase transition in a mirrorless optical parametric oscillator

Sahoo, Sushree S.; Nayak, Satya Samiran; Mishra, Soumya R.; Mohapatra, Ashok K.

doi:10.1103/physreva.102.053724

“…The generic properties of first and second order dissipative phase transitions can be derived from a spectral analysis of the system's Liouvillian [1,2]. Critical behavior at the phase transition has been studied both, theoretically [2,4,[8][9][10][11][12] and experimentally [6,[12][13][14][15][16][17][18][19][20]. One of the paradigmatic examples exhibiting a dissipative phase transition is a single-mode quantum system, realized, e.g., with a nonlinear optical medium in a cavity, which is coherently pumped by a laser and subject to cavity losses [6,[15][16][17]21].…”

mentioning

confidence: 99%

Experimental observation of a dissipative phase transition in a multi-mode many-body quantum system

Benary

¹

,

Baals

²

,

Bernhard

³

et al. 2022

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Dissipative phase transitions are a characteristic feature of open systems. One of the paradigmatic examples for a first order dissipative phase transition is the driven nonlinear single mode optical resonator. In this work, we study a realization with an ultracold bosonic quantum gas, which generalizes the single mode system to many modes and stronger interactions. We measure the effective Liouvillian gap of the system and find evidence for a first order dissipative phase transition. Due to the multi-mode nature of the system, the microscopic dynamics is much richer and allows us to identify a non-equilibrium condensation process.

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“…The generic properties of first and second order dissipative phase transitions can be derived from a spectral analysis of the system's Liouvillian [1,2]. Critical behavior at the phase transition has been studied both, theoretically [2,4,[8][9][10][11][12] and experimentally [6,[12][13][14][15][16][17][18][19][20].…”

mentioning

confidence: 99%