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NIST physicists make record-setting quantum speed

In a presentation of precision quantum control, the physicists of the National Institute of Standards and Technology (NIST) have developed a method to create an ion (an electrically charged atom), which displays the exact amount of quantum-level motion – a specified Up to the amount of 100 power packs or quinets – more than five previous records of 17.

Quantum mechanics, the basic principle of the atomic world, states that energy is released or absorbed in small parcels or bundles, which is called quantum.

By emitting quantities of atomic photons, or light emitting photovoltaic energy. When researchers hunt in the trap, the energy of the motor atoms is taken by the amount of phones, or speed.

In addition to producing single numbers, the NIST team controlled the pendulum-like motion of their ions at the same time to show the speed of two different quantities: Any number up to zero (minimum speed) plus 18 Such a “superposition” characteristic of the strange quantum world.

New methods were posted online on July 22, and new methods can be used with any quantum mechanical oscillator, which includes systems that oscillate like a normal pendulum or vibrate like spring.

Techniques can lead new kind of quantum simulators and sensors by using Phonon as information carriers.

In addition, the ability to customize the overlay can improve quantitative measurement and quantum information processing. Using ion in the overlay as an instrument to measure frequency of more than twice as compared to traditional measurements of ion vibration frequency.

“If we have quantitative control over an object, then we can discourage classic rules to reduce uncertainty in some directions which are necessary in other directions at the expense of further uncertainty,” said the first author Katie McCormick.

“We can use quantitative state as a ruler to measure the properties of the system, and the more we control the quantum, the longer the rulers are more stringent, the greater the quantity Can measure exact. ”

Experiments were performed using a single beryllium ion to carry 40 microns above the gold electrodes in the electromagnetic net radiator.

McCormick said that new results were possible because the Nest researchers were able to reduce undesirable factors such as stray electric fields that exchange energy with ions and interrupt it.

To add phonon to the ions, NIST researchers switched high ultraviolet laser pulses and above the difference between the two “spin” ions, or internal energy configuration. Every ion pulse “spin-up” with “spin down” or vice versa, ionic vibrations in each heart change with the addition of motion.

To make overlays, researchers applied these laser pulses to only half of the wave ion function (wave and rotation probability of particle state).

The second half of the wave function was in the position of the third rotation, which was not affected by laser pulses and remained sedentary.

A large number of overlays and NIST researchers of a sedentary ion state (or land) gave quantum boosters, or measurement sensitivity of accuracy.

He used ion as an interference meter, a device that splits two partial waves and integrates to form an interference pattern that can be analyzed to determine the frequency characteristics.

NIST researchers used interference meters to measure ionic frequency oscillation, which is usually the smallest uncertainty possible.

In particular, the accuracy of the measurement increased linearly with the number of motion quantum, even the best performance in the case of overlays 0 and 12, which provides more than twice the quantitative state sensitivity, which is classically Treats (numerically consist of a set of states).

The overlay position of 0 and 12 was seven times more accurate than 0 and over overlap 1.

To understand that overlapping cases help in measuring the frequency of ion oscillations more accurately, McCormick suggests to imagine a wheel with a speaker.

“Dolan is alternatively shown, describing the position and motion of an ion in a certain essence area,” said McCormick.

Because in this abstract representation, it can be visualized as a wheel with loudspeaker, which can be used to determine the rotation of the state is. The number of speakers, and more accurately we can measure this rotation. ”

The measurement sensitivity provided by the overlay conditions should help identify and reduce the noise of motion, an important source of error that the researchers want to reduce the processing of quantum information using trapped ions.

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