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Fast Preparation and Detection of a Rydberg Qubit Using Atomic Ensembles

Journal Article · · Physical Review Letters
 [1];  [2];  [1];  [2];  [3];  [4];  [1]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  2. Harvard Univ., Cambridge, MA (United States); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  3. Univ. of Erlangen-Nuremberg, Erlangen (Germany); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  4. Harvard Univ., Cambridge, MA (United States)
+ Show Author Affiliations
Here, we demonstrate a new approach for fast preparation, manipulation, and collective readout of an atomic Rydberg-state qubit. By making use of Rydberg blockade inside a small atomic ensemble, we prepare a single qubit within 3 μs with a success probability of $$F_p$$ = 0.93 ± 0.02, rotate it, and read out its state in 6 μs with a single-shot fidelity of $$F_d$$ = 0.92 ± 0.04. The ensemble-assisted detection is 103 times faster than imaging of a single atom with the same optical resolution, and enables fast repeated nondestructive measurement. We observe qubit coherence times of 15 μs, much longer than the π rotation time of 90 ns. Potential applications ranging from faster quantum information processing in atom arrays to efficient implementation of quantum error correction are discussed.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); National Quantum Information Science (QIS) Research Centers (United States). Quantum Systems Accelerator (QSA)
Sponsoring Organization:
Boeing; Defense Advanced Research Projects Agency (DARPA); National Science Foundation (NSF); US Air Force Office of Scientific Research (AFOSR); US Army Research Laboratory (USARL); US Army Research Office (ARO); USDOE Office of Science (SC)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1963892
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 5 Vol. 127; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Figures / Tables (4)

FIG. 1(p. 2)figure FIG. 1
FIG. 2(p. 3)figure FIG. 2
FIG. 3(p. 4)figure FIG. 3
FIG. 4(p. 4)figure FIG. 4

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Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS