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Relaxation to Negative Temperatures in Double Domain Systems
Yusuke Hama, William J. Munro, Kae Nemoto
We investigate the relaxation of two collective spins in double domain system, which are individually coupled to a single bosonic reservoir, by varying the total number of spins in…
Quantum metrology including state preparation and readout times
Shane Dooley, William J. Munro, Kae Nemoto
There is growing belief that the next decade will see the emergence of sensing devices based on the laws of quantum physics that outperform some of our current sensing devices. For…
An efficient and compact quantum switch for quantum circuits
Yulin Wu, Li-Ping Yang, Yarui Zheng +11
The engineering of quantum devices has reached the stage where we now have small scale quantum processors containing multiple interacting qubits within them. Simple quantum circuit…
Some implications of superconducting quantum interference to the application of master equations in engineering quantum technologies
S. N. A. Duffus, K. N. Bjergstrøm, V. M. Dwyer +6
In this paper we consider the modelling and simulation of open quantum systems from a device engineering perspective. We derive master equations at different levels of approximatio…
Classification of spin and multipolar squeezing
Emi Yukawa, Kae Nemoto
We investigate various types of squeezing in a collective su(2J+1) system consisting of spin-J particles (J>1/2). We show that the squeezing in the collective su(2J+1) system can b…
Implementation of bipartite or remote unitary gates with repeater nodes
Li Yu, Kae Nemoto
We propose some protocols to implement various classes of bipartite unitary operations on two remote parties with the help of repeater nodes in-between. We also present a protocol…
Wigner Functions for Arbitrary Quantum Systems
Todd Tilma, Mark J. Everitt, John H. Samson +2
The possibility of constructing a complete, continuous Wigner function for any quantum system has been a subject of investigation for over 50 years. A key system that has served to…