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Two-orbital SU(N) magnetism with ultracold alkaline-earth atoms
Fermionic alkaline-earth atoms have unique properties that make them attractive candidates for the realization of atomic clocks and degenerate quantum gases. At the same time, they are attracting…
Quantum nonlinear optics with single photons enabled by strongly interacting atoms
This work demonstrates a medium that is nonlinear at the level of individual quanta, exhibiting strong absorption of photon pairs while remaining transparent to single photons, paving the way for quantum-by-quantum control of light fields, including single-photon switching, all-optical deterministic quantum logic and the realization of strongly correlated many-body states of light.
Observation of a many-body dynamical phase transition with a 53-qubit quantum simulator
Here, a quantum simulator composed of up to 53 qubits is used to study non-equilibrium dynamics in the transverse-field Ising model with long-range interactions, enabling the dynamical phase transition to be probed directly and revealing computationally intractable features that rely on the long- range interactions and high connectivity between qubits.
Photon storage in Λ -type optically dense atomic media. II. Free-space model
In a recent paper [Gorshkov et al., Phys. Rev. Lett. 98, 123601 (2007)], we presented a universal physical picture for describing a wide range of techniques for storage and retrieval of photon wave…
Attractive photons in a quantum nonlinear medium
A quantum nonlinear medium inside which individual photons travel as massive particles with strong mutual attraction, such that the propagation of photon pairs is dominated by a two-photon bound state is demonstrated.
Non-local propagation of correlations in quantum systems with long-range interactions
This work applies a variable-range Ising spin chain Hamiltonian and aVariable-range XY spin chainHamiltonian to a far-from-equilibrium quantum many-body system and observes its time evolution, determining the spatial and time-dependent correlations, extracting the shape of the light cone and measuring the velocity with which correlations propagate through the system.
Cavity QED with atomic mirrors
A promising approach to merge atomic systems with scalable photonics has emerged recently, which consists of trapping cold atoms near tapered nanofibers. Here, we describe a novel technique to…
Quantum many-body models with cold atoms coupled to photonic crystals
Using cold atoms to simulate strongly interacting quantum systems is an exciting frontier of physics. However, because atoms are nominally neutral point particles, this limits the types of…
Photon-photon interactions via Rydberg blockade.
- A. Gorshkov, J. Otterbach, M. Fleischhauer, T. Pohl, M. Lukin
- PhysicsPhysical review letters
- 18 March 2011
The theory of light propagation under the conditions of electromagnetically induced transparency in systems involving strongly interacting Rydberg states is developed and this system can be used for the generation of nonclassical states of light including trains of single photons with an avoided volume between them.
Universal approach to optimal photon storage in atomic media.
- A. Gorshkov, A. André, M. Fleischhauer, A. Sørensen, M. Lukin
- PhysicsPhysical review letters
- 6 April 2006
This physical picture encompasses a variety of different approaches to pulse storage ranging from adiabatic reduction of the photon group velocity and pulse-propagation control via off-resonant Raman fields to photon-echo-based techniques and derives an optimal control strategy for storage and retrieval of a photon wave packet of any given shape.