Kamil Korzekwa

Quantum Coherence, Time-Translation Symmetry, and Thermodynamics

Quantum mechanics and thermodynamics are fundamental fields of physics. Scientists show how the processing of quantum coherence is constrained by the laws of thermodynamics.

The extraction of work from quantum coherence

The interplay between quantum-mechanical properties, such as coherence, and classical notions, such as energy, is a subtle topic at the forefront of quantum thermodynamics. The traditional Carnot argument limits the conversion of heat to work; here we critically assess the problem of converting coherence to work. Through a careful account of all resources involved in the thermodynamic transformations within a fully quantum-mechanical treatment, we show that there exist thermal machines extracting work from coherence arbitrarily well. Such machines only need to act on individual copies of a state and can be reused. On the other hand, we show that for any thermal machine with finite resources not all the coherence of a state can be extracted as work. However, even bounded thermal machines can be reused infinitely many times in the process of work extraction from coherence.

Operational constraints on state-dependent formulations of quantum error-disturbance trade-off relations

We argue for an operational requirement that all state-dependent measures of disturbance should satisfy. Motivated by this natural criterion, we prove that in any

Decoherence-assisted initialization of a resident hole spin polarization in a p-doped semiconductor quantum well

d

Quantum-state transfer in spin chains via isolated resonance of terminal spins

-dimensional Hilbert space and for any pair of noncommuting operators,

Quantum and classical entropic uncertainty relations

A

Markovian evolution of quantum coherence under symmetric dynamics

and

Structure of the thermodynamic arrow of time in classical and quantum theories

B

Spin dynamics in p-doped semiconductor nanostructures subject to a magnetic field tilted from the Voigt geometry

, there exists a set of at least

Classical noise and the structure of minimum uncertainty states

{2}^{d\ensuremath{-}1}