RSS icon
Twitter icon
Facebook icon
Vimeo icon
YouTube icon

Quantum Trajectories, Decoherence, and What One MIGHT Read from the Environment

June 23, 2016 - 11:00am
Speaker: 
Howard J. Carmichael
Institution: 
University of Auckland

Recent experiments with superconducting qubits have dramatically changed the landscape for addressing elementary quantum systems – both in the preparation and measurement of quantum states. Even the reconstruction of individual quantum trajectories is now carried out. In this talk, I first introduce the idea of a “quantum trajectory”, where I contrast the jump trajectory of photon counting with the diffusive trajectory applicable to superconducting qubits. I then explore two applications, one related to the infamous Schrödinger cat and the other to the Bohr–Schrödinger discussion of quantum jumps in 1926; both, in a modern context, illuminate the meaning of that catchword “decoherence”.

PSC 2136
MD

Subscribe to A Quantum Bit 

Quantum physics began with revolutionary discoveries in the early twentieth century and continues to be central in today’s physics research. Learn about quantum physics, bit by bit. From definitions to the latest research, this is your portal. Subscribe to receive regular emails from the quantum world. Previous Issues...

Sign Up Now

Sign up to receive A Quantum Bit in your email!

 Have an idea for A Quantum Bit? Submit your suggestions to jqi-comm@umd.edu