Cavity QED characterization of many-body atomic states in double-well potentials: Role of dissipation

Chen, W.; Meystre, Pierre

doi:10.1103/physreva.79.043801

Cited by 23 publications

(22 citation statements)

References 28 publications

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“…Such measurements have been proposed [52][53][54][55][56][57][58] and conducted [59,60] in order to extract equal or many-time correlation functions of the atomic gas or the atomic quantum statistics.…”

Section: Introductionmentioning

confidence: 99%

Cavity-induced chiral states of fermionic quantum gases

2016

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We investigate ultra-cold fermions placed into an optical cavity and subjected to optical lattices which confine the atoms to ladder structures. A transverse running-wave laser beam induces together with the dynamical cavity field a two-photon Raman-assisted tunneling process with spatially dependent phase imprint along the rungs of the ladders. We identify the steady states which can occur by the feedback mechanism between the cavity field and the atoms. We find the spontaneous emergence of a finite cavity field amplitude which leads to an artificial magnetic field felt by the fermionic atoms. These form a chiral insulating or chiral liquid state carrying a chiral current. We explore the rich state diagram as a function of the power of the transverse laser beam, the atomic filling, and the phase imprint during the cavity-induced tunneling. Both a sudden onset or a slow exponential activation with the transverse laser power of the self-organized chiral states can occur.

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Section: Introductionmentioning

confidence: 99%

Cavity-induced chiral states of fermionic quantum gases

2016

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“…Moreover, recent proposals have raised the possibility of quantum-state preparation of the atomic ensemble with the help of measuring the output photon signal of a pumped optical resonator [9][10][11][12][13]. The cornerstone of such a quantum-state preparation with the help of a quantum nondemolition measurement is also the mutual back-action between the atomic and photonic degrees of freedom.…”

Section: Introductionmentioning

confidence: 99%

Quantum noise of a Bose-Einstein condensate in an optical cavity, correlations, and entanglement

2010

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A Bose-Einstein condensate of ultracold atoms inside the field of a laser-driven optical cavity exhibits dispersive optical bistability. We describe this system by using mean-field approximation and by analyzing the correlation functions of the linearized quantum fluctuations around the mean-field solution. The entanglement and the statistics of the atom-field quadratures are given in the stationary state. It is shown that the mean-field solution, that is, the Bose-Einstein condensate, is robust against entanglement generation for most of the phase diagram.

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“…Uniting these fields [4,5] broadens both, and goes beyond the cases when either the light or matter are treated classically. Experimental [6][7][8][9][10][11] and theoretical works in this regime have revealed many interesting phenomena, such as the preparation of atomic states and dynamics [12][13][14][15][16][17][18][19], non-destructive measurement [20][21][22][23][24], many-body light-matter entanglement [23], self-organisation, and other new quantum phases [25][26][27][28][29][30][31][32][33][34][35][36].…”

Section: Introductionmentioning

confidence: 99%

Engineering many-body dynamics with quantum light potentials and measurements

Elliott

Mekhov

2016

Phys. Rev. A

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Interactions between many-body atomic systems in optical lattices and light in cavities induce long-range and correlated atomic dynamics beyond the standard Bose-Hubbard model, due to the global nature of the light modes. We characterise these processes, and show that uniting such phenomena with dynamical constraints enforced by the backaction resultant from strong light measurement leads to a synergy that enables the atomic dynamics to be tailored, based on the particular optical geometry, exploiting the additional structure imparted by the quantum light field. This leads to a range of novel, tunable effects such as long-range density-density interactions, perfectlycorrelated atomic tunnelling, superexchange, and effective pair processes. We further show that this provides a framework for enhancing quantum simulations to include such long-range and correlated processes, including reservoir models and dynamical global gauge fields.

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Cavity QED characterization of many-body atomic states in double-well potentials: Role of dissipation

Cited by 23 publications

References 28 publications

Cavity-induced chiral states of fermionic quantum gases

Cavity-induced chiral states of fermionic quantum gases

Quantum noise of a Bose-Einstein condensate in an optical cavity, correlations, and entanglement

Engineering many-body dynamics with quantum light potentials and measurements

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