Phase sensitive two mode squeezing and photon correlations from exciton superfluid

Abstract

There have been experimental and theoretical studies on Photoluminescence (PL) from possible exciton superfluid in semiconductor electron-hole bilayer systems. However, the PL contains no phase information and no photon correlations, so it can only lead to suggestive evidences. It is important to identify smoking gun experiments which can lead to convincing evidences. Here we study two mode phase sensitive squeezing spectrum and also two photon correlation functions. We find the emitted photons along all tilted directions are always in a two mode squeezed state between $\vec{k}$ and $-\vec{k}$. There are always two photon bunching, the photon statistics is super-Poissonian. Observing these unique features by possible future phase sensitive homodyne experiment and HanburyBrown-Twiss type of experiment could lead to conclusive evidences of exciton superfluid in these systems.

5 pages, 4 color figures, REVTEX 4, Final version to appear in Phys. Rev. B

References in corpus (5)

• Feshbach Resonances in Ultracold Gases
• Vortices and Superfluidity in a Strongly Interacting Fermi Gas
• A Quantum-Enhanced Prototype Gravitational-Wave Detector
• Undoped Electron-Hole Bilayers in a GaAs/AlGaAs Double Quantum Well
• Angular distribution of photoluminescence as a probe of Bose Condensation of trapped excitons

Cited by in corpus (6)

• Goldstone and Higgs modes of photons inside a cavity
• Quantum magnetism of spinor bosons in optical lattices with synthetic non-Abelian gauge fields
• Optical Bragg, atom Bragg and cavity QED detections of quantum phases and excitation spectra of ultracold atoms in bipartite and frustrated optical lattices
• Pairing sizes in attractively interacting Fermi gases with Spin-orbit Couplings
• Parity oscillations and photon correlation functions in the $Z_2/U(1)$ Dicke model at a finite number of atoms or qubits
• Exciton correlations and input-output relations in non-equilibrium exciton superfluids