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Title: Scalable high-rate, high-dimensional time-bin encoding quantum key distribution

Journal Article · · Quantum Science and Technology
ORCiD logo [1];  [2];  [3]; ORCiD logo [4];  [5];  [6]
  1. The Ohio State Univ., Columbus, OH (United States); Duke Univ., Durham, NC (United States)
  2. National Univ. of Singapore (Singapore)
  3. Duke Univ., Durham, NC (United States)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  5. Duke Univ., Durham, NC (United States); IonQ, Inc., College Park, MD (United States)
  6. The Ohio State Univ., Columbus, OH (United States)

We propose and experimentally demonstrate a new scheme for measuring high-dimensional phase states using a two-photon interference technique, which we refer to as quantum-controlled measurement. Using this scheme, we implement a d-dimensional time-phase quantum key distribution (QKD) system and achieve secret key rates of 5.26 and 8.65 Mbps using d = 2 and d = 8 quantum states, respectively, for a 4 dB channel loss, illustrating that high-dimensional time-phase QKD protocols are advantageous for low-loss quantum channels. Here, this work paves the way for practical high-dimensional QKD protocols for metropolitan-scale systems. Furthermore, our results apply equally well for other high-dimensional protocols, such as those using the spatial degree-of-freedom with orbital angular momentum states being one example.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1526373
Journal Information:
Quantum Science and Technology, Vol. 4, Issue 3; ISSN 2058-9565
Publisher:
IOPscienceCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 15 works
Citation information provided by
Web of Science

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