Probing and Manipulating Fermionic and Bosonic Quantum Gases with Quantum Light

Elliott, Thomas J.; Mazzucchi, Gabriel; Kozłowski, Wojciech; Caballero-Benítez, Santiago F.; Mekhov, Igor B.

doi:10.3390/atoms3030392

Cited by 17 publications

(30 citation statements)

References 49 publications

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“…It is now experimentally possible to access the regime where light-matter coupling is strong enough and the cavity parameters allow to study the formation of quantum many-body phases with cavity decay rates of MHz [14] and kHz [15]. The light inside the cavity can be used to control the formation of many-body phases of matter even in a single cavity mode [9,[16][17][18]. This leads to several effects yet to be observed due to the dynamical properties of light [19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, when atoms scatter light minimally to reach the ground-state (g 0 eff > ), the squeezing parameter is different for SF and gapped SF states. The squeezing parameter for a quantum superposition (QS) state[18,24] is In addition, dynamical terms can induce bond ordering due to the emergent coupling J E,j as Ũ increases. Emergent bond ordering due to density coupling occurs because products of weighted bond and bond current operators modify the effective Hamiltonian via  c .…”

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confidence: 99%

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Quantum properties of light scattered from structured many-body phases of ultracold atoms in quantum optical lattices

Caballero-Benítez

Mekhov

2015

New J. Phys.

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Quantum trapping potentials for ultracold gases change the landscape of classical properties of scattered light and matter. The atoms in a quantum many-body correlated phase of matter change the properties of light and vice versa. The properties of both light and matter can be tuned by design and depend on the interplay between long-range (nonlocal) interactions mediated by an optical cavity and short-range processes of the atoms. Moreover, the quantum properties of light get significantly altered by this interplay, leading the light to have nonclassical features. Further, these nonclassical features can be designed and optimised. OPEN ACCESS RECEIVED), we find that the matter induces structure to the squeezing parameter. As it has been shown [24] besides from SF, MI the system supports gapped superfluid states, dimer phases, supersolid (SS) and density waves (DW). 6.2. Diagonal coupling, illuminating at lattice sites. Without bond ordering (J 0 B, = j , J J D, D

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

Quantum properties of light scattered from structured many-body phases of ultracold atoms in quantum optical lattices

Caballero-Benítez

Mekhov

2015

New J. Phys.

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“…These new experiments enable the study of novel effects where the atomic interactions are mediated by the light field [27][28][29][30][31], enriching the phenomenology of these systems and leading to new quantum phases. Moreover, the entanglement between the light and matter degrees of freedom is at the core of several quantum nondemolition proposals [32][33][34][35][36][37][38][39][40] where atomic properties are inferred from the observation of the scattered light.…”

Section: Introductionmentioning

confidence: 99%

Collective dynamics of multimode bosonic systems induced by weak quantum measurement

et al. 2016

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In contrast to the fully projective limit of strong quantum measurement, where the evolution is locked to a small subspace (quantum Zeno dynamics), or even frozen completely (quantum Zeno effect), the weak non-projective measurement can effectively compete with standard unitary dynamics leading to nontrivial effects. Here we consider global weak measurement addressing collective variables, thus preserving quantum superpositions due to the lack of which path information. While for certainty we focus on ultracold atoms, the idea can be generalized to other multimode quantum systems, including various quantum emitters, optomechanical arrays, and purely photonic systems with multiple-path interferometers (photonic circuits). We show that light scattering from ultracold bosons in optical lattices can be used for defining macroscopically occupied spatial modes that exhibit long-range coherent dynamics. Even if the measurement strength remains constant, the quantum measurement backaction acts on the atomic ensemble quasi-periodically and induces collective oscillatory dynamics of all the atoms. We introduce an effective model for the evolution of the spatial modes and present an analytic solution showing that the quantum jumps drive the system away from its stable point. We confirm our finding describing the atomic observables in terms of stochastic differential equations.

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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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Probing and Manipulating Fermionic and Bosonic Quantum Gases with Quantum Light

Cited by 17 publications

References 49 publications

Quantum properties of light scattered from structured many-body phases of ultracold atoms in quantum optical lattices

Quantum properties of light scattered from structured many-body phases of ultracold atoms in quantum optical lattices

Collective dynamics of multimode bosonic systems induced by weak quantum measurement

Engineering many-body dynamics with quantum light potentials and measurements

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