# Repulsive photons in a quantum nonlinear medium

@article{Cantu2020RepulsivePI, title={Repulsive photons in a quantum nonlinear medium}, author={Sergio H. Cantu and Aditya V. Venkatramani and Wenchao Xu and Leo Zhou and Branislav M Jelenkovi'c and Mikhail D. Lukin and Vladan Vuleti'c}, journal={Nature Physics}, year={2020}, pages={1-5} }

The ability to control strongly interacting light quanta (photons) is of central importance in quantum science and engineering 1 – 5 . Recently it was shown that such strong interactions can be engineered in specially prepared quantum optical systems 6 – 10 . Here, we demonstrate a method for coherent control of strongly interacting photons, extending quantum nonlinear optics into the domain of repulsive photons. This is achieved by coherently coupling photons to several atomic states…

## 24 Citations

### Self-ordering of individual photons in waveguide QED and Rydberg-atom arrays

- PhysicsPhysical Review Research
- 2022

The scattering between light and individual saturable quantum emitters can induce strong optical nonlinearities and correlations between individual light quanta. Typically, this leads to an effective…

### Nonlinear absorption in interacting Rydberg electromagnetically-induced-transparency spectra on two-photon resonance

- PhysicsPhysical Review A
- 2021

We experimentally investigate the nonlinear transmission spectrum of coherent light fields propagating through a Rydberg EIT medium with strong atomic interactions. In contrast to previous…

### Light propagation in a three-dimensional Rydberg gas with a nonlocal optical response.

- PhysicsOptics express
- 2021

The 3-D Rydberg gas is shown to be an ideal medium for studying nonlocal wave phenomena, in which the strength, range, and sign of the nonlocal interaction kernel can be widely tuned.

### Tunable Three-Body Loss in a Nonlinear Rydberg Medium.

- PhysicsPhysical review letters
- 2021

This work studies three-body scattering loss for Rydberg-EIT in a wide regime of single and two-photon detunings and suggests that the observed features in the outgoing photonic correlations are caused by the resonant enhancement of the three- body losses.

### Two-color optical nonlinearity in an ultracold Rydberg atom gas mixture

- PhysicsPhysical Review A
- 2021

We report the experimental observation of strong two-color optical nonlinearity in an ultracold gas of Rb-Rb atom mixture. By simultaneously coupling two probe transitions of Rb and Rb atoms to…

### Resonant enhancement of three-body loss between strongly interacting photons

- PhysicsPhysical Review Research
- 2022

Rydberg polaritons provide an example of a rare type of system where three-body interactions can be as strong or even stronger than two-body interactions. The three-body interactions can be either…

### Dissipation-Engineered Family of Nearly Dark States in Many-Body Cavity-Atom Systems.

- PhysicsPhysical review letters
- 2022

Three-level atomic systems coupled to light have the capacity to host dark states. We study a system of V-shaped three-level atoms coherently coupled to the two quadratures of a dissipative cavity.…

### Quantum Estimation of Kerr Nonlinearity in Driven-Dissipative Systems

- PhysicsSSRN Electronic Journal
- 2022

### Deterministic Time-Bin Entanglement between a Single Photon and an Atomic Ensemble.

- PhysicsPhysical review letters
- 2022

Hybrid matter-photon entanglement is the building block for quantum networks. It is very favorable if the entanglement can be prepared with a high probability. In this Letter, we report the…

### Non-Hermitian many-body topological excitations in interacting quantum dots

- PhysicsPhysical Review Research
- 2022

Quantum dots are one of the paradigmatic solid-state systems for quantum engineering, providing an outstanding tunability to explore fundamental quantum phenomena. Here we show that nonHermitian…

## References

SHOWING 1-10 OF 32 REFERENCES

### Attractive photons in a quantum nonlinear medium

- PhysicsNature
- 2013

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.

### Quantum nonlinear optics with single photons enabled by strongly interacting atoms

- PhysicsNature
- 2012

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.

### Crystallization of strongly interacting photons in a nonlinear optical fibre

- Physics
- 2008

Understanding strongly correlated quantum systems is a central problem in many areas of physics. The collective behaviour of interacting particles gives rise to diverse fundamental phenomena such as…

### Observation of three-photon bound states in a quantum nonlinear medium

- PhysicsScience
- 2018

The observation of traveling three-photon bound states in a quantum nonlinear medium where the interactions between photons are mediated by atomic Rydberg states demonstrates the ability to realize and control strongly interacting quantum many-body states of light.

### Quantum Crystals and Laughlin Droplets of Cavity Rydberg Polaritons

- Physics
- 2015

Synthetic quantum materials offer an exciting opportunity to explore quantum many-body physics and novel states of matter under controlled conditions. In particular, they provide an avenue to…

### Interacting Floquet polaritons

- PhysicsNature
- 2019

The production of Floquet polaritons provides a promising new route to the realization of ordered states of strongly correlated photons, including crystals and topological fluids, as well as quantum information technologies such as multimode photon-by-photon switching.

### A photon–photon quantum gate based on a single atom in an optical resonator

- PhysicsNature
- 2016

Strong light–matter coupling provided by a single atom in a high-finesse optical resonator is used to realize the Duan–Kimble protocol of a universal controlled phase flip (π phase shift) photon–photon quantum gate, which has the capability of conditional polarization flipping as well as entanglement generation between independent input photons.

### A dissipatively stabilized Mott insulator of photons

- PhysicsNature
- 2019

A versatile method for dissipative preparation of incompressible many-body phases through reservoir engineering is developed and used to stabilize a Mott insulator phase of photons trapped in a superconducting circuit, providing insights into thermalization processes in strongly correlated quantum matter.

### Photon-photon interactions via Rydberg blockade.

- PhysicsPhysical review letters
- 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.

### Observation of Three-Body Correlations for Photons Coupled to a Rydberg Superatom.

- PhysicsPhysical review letters
- 2018

An idealized but exactly solvable model of a single two-level system coupled to a photonic mode, which allows for an interpretation of the experimental observations in terms of bound states and scattering states is presented.