Instytut Podstawowych Problemów Techniki
Polskiej Akademii Nauk

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T. V. Kondra


Ostatnie publikacje
1.  Ganardi R., Kondra T. V., Streltsov A., Catalytic and Asymptotic Equivalence for Quantum Entanglement, PHYSICAL REVIEW LETTERS, ISSN: 0031-9007, DOI: 10.1103/PhysRevLett.133.250201, Vol.133, No.250201, pp.250201-1-250201-7, 2024200p.
2.  Kondra T., Ray G., Streltsov A., Coherence Manipulation in Asymmetry and Thermodynamics, PHYSICAL REVIEW LETTERS, ISSN: 0031-9007, DOI: 10.1103/PhysRevLett.132.200201, Vol.132, pp.200201-1-200201-6, 2024

Streszczenie:
In the classical regime, thermodynamic state transformations are governed by the free energy. This is also called as the second law of thermodynamics. Previous works showed that, access to a catalytic system allows us to restore the second law in the quantum regime when we ignore coherence. However, in the quantum regime, coherence and free energy are two independent resources. Therefore, coherence places additional nontrivial restrictions on the state transformations that remain elusive. In order to close this gap, we isolate and study the nature of coherence, i.e., we assume access to a source of free energy. We show that allowing catalysis along with a source of free energy allows us to amplify any quantum coherence present in the quantum state arbitrarily. Additionally, any correlations between the system and the catalyst can be suppressed arbitrarily. Therefore, our results provide a key step in formulating a fully general law of quantum thermodynamics.

Afiliacje autorów:
Kondra T. - inna afiliacja
Ray G. - inna afiliacja
Streltsov A. - IPPT PAN
200p.
3.  Wu K., Kondra T. V., Scandolo C., Swapan R., Xiang G., Li C., Guo G., Streltsov A., Resource theory of imaginarity in distributed scenarios, Communications Physics, ISSN: 2399-3650, DOI: 10.1038/s42005-024-01649-y, Vol.7, No.171, pp.1-9, 2024

Streszczenie:
The resource theory of imaginarity studies the operational value of imaginary parts in quantum states, operations, and measurements. Here we introduce and study the distillation and conversion of imaginarity in distributed scenario. This arises naturally in bipartite systems where both parties work together to generate the maximum possible imaginarity on one of the subsystems. We give exact solutions to this problem for general qubit states and pure states of arbitrary dimension. We present a scenario that demonstrates the operational advantage of imaginarity: the discrimination of quantum channels without the aid of an ancillary system. We then link this scenario to local operations and classical communications(LOCC) discrimination of bipartite states. We experimentally demonstrate the relevant assisted distillation protocol, and show the usefulness of imaginarity in the aforementioned two tasks.

Afiliacje autorów:
Wu K. - inna afiliacja
Kondra T. V. - inna afiliacja
Scandolo C. - inna afiliacja
Swapan R. - inna afiliacja
Xiang G. - inna afiliacja
Li C. - inna afiliacja
Guo G. - inna afiliacja
Streltsov A. - IPPT PAN
70p.

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