Tue March 31, 2026 4:00 pm
CUA Seminar: David Hume – Quantum-limited measurements with the Al+ optical clocks at NIST
Location:MIT 4-270
Ten Minute Talk:"Quantum sensing with arbitrary frequency resolution via correlation measurements" by
Jungbae Yoon,
MIT
The Ion Storage Group at NIST has developed several generations of optical atomic clocks based on quantum logic spectroscopy of the 1S0–3P0 transition in 27Al+. The latest version of this system began operation last year and achieves higher stability, longer continuous run times and lower systematic uncertainty than previous versions. In this talk I will review the quantum-logic clock effort at NIST and introduce the newest system, which reaches an systematic uncertainty of 5.5×10-19 and an instability averaging as 3.5×10-16/(τ /s)^(1/2). Further improvement to this instability could be achieved by using differential measurement techniques and by scaling the system to multiple clock ions, including the possibility of measurements with entangled states.