Single-shot measurement of a Rydberg superatom via collective photon burst
arXiv:2106.10858
Abstract
With Rydberg dipole interactions, a mesoscopic atomic ensemble may behave like a two-level single atom, resulting in the so-called picture of superatom. It is in potential a strong candidate as a qubit in quantum information science, especially for efficient coupling with single photons via collective enhancement that is essential for building quantum internet to connect remote quantum computers. Previously, preliminary studies have been carried out in demonstrating basic concept of Rydberg superatom, a single-photon source, and entanglement with a single photon, etc. While a crucial element of single-shot qubit measurement is still missing. Here we realize the deterministic measurement of a superatom qubit via photon burst in a single shot. We make use of a low-finesse ring cavity to enhance the atom-photon interaction and obtain an in-fiber retrieval efficiency of 44%. Harnessing dipole interaction between two Rydberg levels, we may either create a sequence of multiple single photons or nothing, conditioned on the initial qubit state. We achieve a single-shot measurement fidelity of 93.2% in 4.8 us. Our work complements the experimental toolbox of harnessing Rydberg superatom for quantum information applications.
arXiv comment6 pages, 4 figures
References in corpus (18)
- The Quantum Internet
- Quantum information with Rydberg atoms
- All-Optical Switch and Transistor Gated by One Stored Photon
- Single Photon Transistor Mediated by Inter-State Rydberg Interaction
- Single-Photon Transistor Using a Förster Resonance
- Observation of coherent many-body Rabi oscillations
- Efficient and long-lived quantum memory with cold atoms inside a ring cavity
- An efficient quantum light-matter interface with sub-second lifetime
- Three-dimensional trapping of individual Rydberg atoms in ponderomotive bottle beam traps
- Coherence and Rydberg blockade of atomic ensemble qubits
- Enhancement of Rydberg-mediated single-photon nonlinearities by electrically tuned Förster Resonances
- Free-space lossless state-detection of a single trapped atom
- Parallel low-loss measurement of multiple atomic qubits
- 'Free-Space' Photonic Quantum Link and Chiral Quantum Optics
- Nondestructive Fluorescent State Detection of Single Neutral Atom Qubits
- Hong-Ou-Mandel Interference between Two Deterministic Collective Excitations in an Atomic Ensemble
- Deterministic free-space source of single photons using Rydberg atoms
- Semi-Deterministic Entanglement between a Single Photon and an Atomic Ensemble