6 papers
On Quantum Entropy and Excess Entropy Production in a System-Environment Pure State
Phillip C. Lotshaw, Michael E. Kellman
We explore a recently introduced quantum thermodynamic entropy of a pure state of a composite system-environment computational "universe" with a simple system $\mathca…
Multi-angle Quantum Approximate Optimization Algorithm
Rebekah Herrman, Phillip C. Lotshaw, James Ostrowski +2
The quantum approximate optimization algorithm (QAOA) generates an approximate solution to combinatorial optimization problems using a variational ansatz circuit defined by paramet…
Globally optimizing QAOA circuit depth for constrained optimization problems
Rebekah Herrman, Lorna Treffert, James Ostrowski +3
We develop a global variable substitution method that reduces -variable monomials in combinatorial optimization problems to equivalent instances with monomials in fewer variable…
Asymmetric temperature equilibration with heat flow from cold to hot in a quantum thermodynamic system
Phillip C. Lotshaw, Michael E. Kellman
A model computational quantum thermodynamic network is constructed with two variable temperature baths coupled by a linker system, with an asymmetry in the coupling of the linker t…
Impact of Graph Structures for QAOA on MaxCut
Rebekah Herrman, Lorna Treffert, James Ostrowski +3
The quantum approximate optimization algorithm (QAOA) is a promising method of solving combinatorial optimization problems using quantum computing. QAOA on the MaxCut problem has b…
Simulating quantum thermodynamics of a finite system and bath with variable temperature
Phillip C. Lotshaw, Michael E. Kellman
We construct a finite bath with variable temperature for quantum thermodynamic simulations in which heat flows between a system and the bath environment …