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Nondestructive detection of single photons has long been a major puzzle
for researchers.
Recently, a scientific research team led by Andreas Reiserer, a scientist at the Max Planck Institute for Quantum Optics in Germany, successfully developed a new device using single-photon source technology, which can successfully achieve single-photon detection
without losing photon energy.
Reiserer, Dr.
Stephan Ritter and Professor Gerhard Rempe co-participated in the study
.
The device consists of a cavity as the working element, which contains a pair of highly reflective mirrors
facing each other closely.
After entering the cavity, photons are reflected back and forth thousands of times and interact strongly with the rubidium atoms in the cavity
.
Researchers can perform photon detection by changing the phase of incident photons without losing the energy of the
photons.
If the photons are not damaged during detection, the detection can be repeated, improving detector efficiency
.
In addition, in quantum networks, photons are also carriers of
quantum information.
The results show that the method can also perform non-destructive detection of photons in quantum networks, while retaining the coding information
carried by photons.
Using traditional photodetectors, the staff successfully tracked the reflected photons to prove the achievability
of non-destructive testing.
In the shuffling experiment, the single-photon detection efficiency can reach 74%, while the efficiency of the general destructive detector is only 60%.
Nondestructive detection of single photons has long been a major puzzle
for researchers.
Recently, a scientific research team led by Andreas Reiserer, a scientist at the Max Planck Institute for Quantum Optics in Germany, successfully developed a new device using single-photon source technology, which can successfully achieve single-photon detection
without losing photon energy.
Reiserer, Dr.
Stephan Ritter and Professor Gerhard Rempe co-participated in the study
.
The device consists of a cavity as the working element, which contains a pair of highly reflective mirrors
facing each other closely.
After entering the cavity, photons are reflected back and forth thousands of times and interact strongly with the rubidium atoms in the cavity
.
Researchers can perform photon detection by changing the phase of incident photons without losing the energy of the
photons.
If the photons are not damaged during detection, the detection can be repeated, improving detector efficiency
.
In addition, in quantum networks, photons are also carriers of
quantum information.
The results show that the method can also perform non-destructive detection of photons in quantum networks, while retaining the coding information
carried by photons.
Using traditional photodetectors, the staff successfully tracked the reflected photons to prove the achievability
of non-destructive testing.
In the shuffling experiment, the single-photon detection efficiency can reach 74%, while the efficiency of the general destructive detector is only 60%.
