High-efficiency photon detection support for a medium-distance quantum network
Abstract
Over the past few years we have seen an enormous advance in quantum technology with programmable multi-qubit quantum computers realized on di erent technology platforms. Just as with classical computers, their true power will only be unlocked once these devices are linked in a network. Therefore, the next frontier for quantum computers, and quantum technology more widely, is connecting distant quantum nodes using telecom photons as information carriers. Ongoing e orts aim to convert entangled photons to ber-amenable wavelengths, so far with low eciency and high noise. We are implementing a new experimental method based on direct ion-photon transmission from Strontium ions, which will allow for the establishment of medium-distance quan-tum links, and open up the study and development of networked quantum technology capabilities in the near term. We describe an ongoing experimental campaign conducted at the Joint Quantum Institute at the University of Maryland with ARO support to establish the viability of this new method. The construction of a new experimental apparatus is nearing completion with the ability to trap and hold Strontium ions, together with techniques for preparation and readout of their electronic quantum state. Following that, an ion will be made to emit single photons at 1092 nm which is a wavelength amenable to ber transmission over medium to large distances. The polarization state of such a photon is entangled with the quantum state of the emitting ion. We will verify this entanglement and show that it persists even after transmission through a ber that is several km in length. This project has the potential to steer the prevailing game for plan quantum networks, at least on the scale of a city, in a new direction. It does depend critically on the ability to detect 1092 nm photons. This proposal aims to provide this capability for the project by adding the only detector type capable of registering these photons with high quantum eciency and low dark counts, a superconducting nanowire single-photon detector.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Feb 03, 2022
- Source ID
- W911NF2210032
Entities
People
- Norbert M Linke
Organizations
- Army Contracting Command
- United States Army
- University of Maryland