Fundamental quantum bounds on stability of atomic clocks

Speaker: 

Rafal Demkowicz-Dobrzański, Uniwersytet Warszawski

Date: 

07/12/2016 - 12:15

In atomic clocks, the frequency of a local oscillator is stabilized based on the feedback signal obtained by periodically interrogating an atomic reference system. The instability of the clock is characterized by the Allan variance, a measure widely used to describe the noise of frequency standards. We provide an explicit method to find the ultimate bound on the Allan variance of an atomic clock in the most general scenario where N atoms are prepared in an arbitrarily entangled state and arbitrary measurement and feedback schemes are allowed.

Seminar photos: 
Rafal Demkowicz-Dobrzanski, Fundamental quantum bounds on stability of atomic clocksRafal Demkowicz-Dobrzanski, Fundamental quantum bounds on stability of atomic clocksRafal Demkowicz-Dobrzanski, Fundamental quantum bounds on stability of atomic clocksRafal Demkowicz-Dobrzanski, Fundamental quantum bounds on stability of atomic clocks

Historia zmian

Data aktualizacji: 18/06/2018 - 09:36; autor zmian: ()

In atomic clocks, the frequency of a local oscillator is stabilized based on the feedback signal obtained by periodically interrogating an atomic reference system. The instability of the clock is characterized by the Allan variance, a measure widely used to describe the noise of frequency standards. We provide an explicit method to find the ultimate bound on the Allan variance of an atomic clock in the most general scenario where N atoms are prepared in an arbitrarily entangled state and arbitrary measurement and feedback schemes are allowed.

Data aktualizacji: 30/11/2016 - 13:52; autor zmian: ()
In atomic clocks, the frequency of a local oscillator is stabilized based on the feedback signal obtained by periodically interrogating an atomic reference system. The instability of the clock is characterized by the Allan variance, a measure widely used to describe the noise of frequency standards. We provide an explicit method to find the ultimate bound on the Allan variance of an atomic clock in the most general scenario where N atoms are prepared in an arbitrarily entangled state and arbitrary measurement and feedback schemes are allowed.
Data aktualizacji: 29/11/2016 - 09:27; autor zmian: ()
In atomic clocks, the frequency of a local oscillator is stabilized based on the feedback signal obtained by periodically interrogating an atomic reference system. The instability of the clock is characterized by the Allan variance, a measure widely used to describe the noise of frequency standards. We provide an explicit method to find the ultimate bound on the Allan variance of an atomic clock in the most general scenario where N atoms are prepared in an arbitrarily entangled state and arbitrary measurement and feedback schemes are allowed.
Data aktualizacji: 29/11/2016 - 09:26; autor zmian: ()
In atomic clocks, the frequency of a local oscillator is stabilized based on the feedback signal obtained by periodically interrogating an atomic reference system. The instability of the clock is characterized by the Allan variance, a measure widely used to describe the noise of frequency standards. We provide an explicit method to find the ultimate bound on the Allan variance of an atomic clock in the most general scenario where N atoms are prepared in an arbitrarily entangled state and arbitrary measurement and feedback schemes are allowed.
Data aktualizacji: 28/11/2016 - 11:02; autor zmian: Zbigniew Puchała (zbyszek@iitis.pl)
In atomic clocks, the frequency of a local oscillator is stabilized based on the feedback signal obtained by periodically interrogating an atomic reference system. The instability of the clock is characterized by the Allan variance, a measure widely used to describe the noise of frequency standards. We provide an explicit method to find the ultimate bound on the Allan variance of an atomic clock in the most general scenario where N atoms are prepared in an arbitrarily entangled state and arbitrary measurement and feedback schemes are allowed.
Data aktualizacji: 28/11/2016 - 11:01; autor zmian: Zbigniew Puchała (zbyszek@iitis.pl)
In atomic clocks, the frequency of a local oscillator is stabilized based on the feedback signal obtained by periodically interrogating an atomic reference system. The instability of the clock is characterized by the Allan variance, a measure widely used to describe the noise of frequency standards. We provide an explicit method to find the ultimate bound on the Allan variance of an atomic clock in the most general scenario where N atoms are prepared in an arbitrarily entangled state and arbitrary measurement and feedback schemes are allowed.