Multimode Time-Delay Interferometer for Free-Space Quantum Communication

  title={Multimode Time-Delay Interferometer for Free-Space Quantum Communication},
  author={Clinton Cahall and Nurul T Islam and Daniel J. Gauthier and Jungsang Kim},
  journal={Physical Review Applied},
Quantum communication schemes such as quantum key distribution (QKD) and superdense teleportation provide unique opportunities to communicate information securely. Increasingly, optical communication is being extended to free-space channels, but atmospheric turbulence in free-space channels requires optical receivers and measurement infrastructure to support many spatial modes. Here we present a multi-mode, Michelson-type time-delay interferometer using a field-widened design for the… 
Prospects of time-bin quantum key distribution in turbulent free-space channels
This work presents the possibilities of implementing time-bin protocols in turbulent free-space channels, using the coherent one-way protocol as the example, and presents an analysis of the secret key rate and quantum bit error rate, providing the errors due to noise counts, and the extinction ratio of the pulses.
Towards free-space quantum key distribution with a 2D single-photon sensor
Applications of quantum key distribution are becoming more diverse due to the increase in interest in the secure key sharing protocol. Transmission through free-space channels has risen in popularity
Hyperentangled Time-bin and Polarization Quantum Key Distribution
Fiber-based quantum key distribution (QKD) networks are currently limited without quantum repeaters. Satellite-based QKD links have been proposed to extend the network domain. We have developed a
Towards combined quantum bit detection and spatial tracking using an arrayed single-photon sensor.
A two-dimensional CMOS single-photon avalanche diode detector array is applied to measure and monitor the single- photon level interference of a free-space time-bin receiver interferometer while simultaneously tracking the spatial position of the single -photon level signal.
Photon-efficient quantum key distribution using multiqubit time-bin encoding
A method for photon-efficient quantum key distribution (QKD) is proposed and analyzed theoretically. The technique is based on nested encoding of multiple logical qubits into the discretized temporal


Super-dense teleportation for space applications
Establishing a quantum communication network would provide advantages in areas such as security and information processing. Such a network would require the implementation of quantum teleportation
Robust and Stable Delay Interferometers with Application to d -Dimensional Time-Frequency Quantum Key Distribution
We investigate experimentally a cascade of temperature-compensated unequal-path interferometers that can be used to measure frequency states in a high-dimensional quantum distribution system. In
The information of high-dimensional time-bin encoded photons
Abstract High-dimensional entanglement is an important physical resource for quantum communication. A basic issue for any communication scheme is how many shared bits two parties can extract subject
Interference at the Single Photon Level Along Satellite-Ground Channels.
This work experimentally demonstrates single photon interference at a ground station due to the coherent superposition of two temporal modes reflected by a rapidly moving satellite a thousand kilometers away and attest to the viability of photon temporal modes for fundamental tests of physics and quantum communication in space.
Free-Space distribution of entanglement and single photons over 144 km
Quantum Entanglement is the essence of quantum physics and inspires fundamental questions about the principles of nature. Moreover it is also the basis for emerging technologies of quantum
Security of high-dimensional quantum key distribution protocols using Franson interferometers
This work investigates the security of modified Franson-based-protocols, where Alice and Bob have two or more Franson interferometers and shows that such setups can improve the sensitivity against attacks that localize the photons to multiple temporal locations.
Entanglement-based quantum communication over 144km
Quantum entanglement is the main resource to endow the field of quantum information processing with powers that exceed those of classical communication and computation. In view of applications such
Provably secure and high-rate quantum key distribution with time-bin qudits
This work developed a discrete-variable QKD system based on time-bin quantum photonic states that can generate provably secure cryptographic keys at megabit-per-second rates over metropolitan distances and is robust against coherent attacks, finite-size effects, and a broad class of experimental imperfections identified in the system.
Quantum information processing with space-division multiplexing optical fibres
Recent results in quantum information based on space-division multiplexing optical fibres are reviewed, and new possibilities based on this technology are discussed.
Securing quantum key distribution systems using fewer states
The results demonstrate that it is possible to substantially simplify the design of high-dimension QKD systems, including those that use the spatial or temporal degrees-of-freedom of the photon, and still outperform qubit-based ($d = 2$) protocols.