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Recently, researchers at the National Institute of Standards and Technology (NIST) set a new record for the length of quantum teleportation in optical fibers, reaching 102km, which is four times
that a scientific research organization at the University of Geneva in Switzerland could reach 25km last year.
The NIST team, led by Hiroki Takasue a visiting scholar from NTT's Basic Research Laboratory in Japan, used quad superconducting nanowire single-photon detectors (SNSPDs) to achieve this record-breaking quantum teleportation
.
SNSPDs detectors are made of amorphous molybdenum silicide, and the detection efficiency is between
80%~86%.
The researchers placed pairs of entangled photons into the 15646.
3 nm signal channel and the 1555.
9 nm lazy channel
, respectively.
The signal and input photons pass through two SNSPDs detectors, while the signal travels through a dispersive displacement fiber to another SNSPDs detector
102 km away.
The team only experimented with partially combined quantum states, so in fact, only less than 25% of photon transmission was used to produce quantum teleportation
.
Moreover, only about 1% of the lazy photons in the experiment can pass through a 102-kilometer-long optical fiber, so the experiment is less efficient than the quantum teleportation experiment conducted in the Canary Islands in 2012, which was 143 kilometers apart
.
However, the success of NIST's experiment lies in the fact that it can achieve long-distance transmission
of quantum states 83% of the time.
Scientists hope that the long-distance quantum state teleportation method can realize the establishment of quantum repeaters and eventually lead to superior optical fiber networks
.
Recently, researchers at the National Institute of Standards and Technology (NIST) set a new record for the length of quantum teleportation in optical fibers, reaching 102km, which is four times
that a scientific research organization at the University of Geneva in Switzerland could reach 25km last year.
The NIST team, led by Hiroki Takasue a visiting scholar from NTT's Basic Research Laboratory in Japan, used quad superconducting nanowire single-photon detectors (SNSPDs) to achieve this record-breaking quantum teleportation
.
SNSPDs detectors are made of amorphous molybdenum silicide, and the detection efficiency is between
80%~86%.
The researchers placed pairs of entangled photons into the 15646.
3 nm signal channel and the 1555.
9 nm lazy channel
, respectively.
The signal and input photons pass through two SNSPDs detectors, while the signal travels through a dispersive displacement fiber to another SNSPDs detector
102 km away.
The team only experimented with partially combined quantum states, so in fact, only less than 25% of photon transmission was used to produce quantum teleportation
.
Moreover, only about 1% of the lazy photons in the experiment can pass through a 102-kilometer-long optical fiber, so the experiment is less efficient than the quantum teleportation experiment conducted in the Canary Islands in 2012, which was 143 kilometers apart
.
However, the success of NIST's experiment lies in the fact that it can achieve long-distance transmission
of quantum states 83% of the time.
Scientists hope that the long-distance quantum state teleportation method can realize the establishment of quantum repeaters and eventually lead to superior optical fiber networks
.
