Bad quantum money drives out good quantum one

Semi-Device Independent Quantum Money, by Karol Horodecki and Maciej Stankiewicz

The seminal idea of quantum money not forgeable due to laws of Quantum Mechanics proposed by Stephen Wiesner, has laid foundations for the Quantum Information Theory in early ’70s. Recently, several other schemes for quantum currencies have been proposed, all however relying on the assumption that the mint does not cooperate with the counterfeiter. Drawing inspirations from the semi-device independent quantum key distribution protocol, we introduce the first scheme of  quantum money with this assumption partially relaxed, along with the proof of its unforgeability. Significance of this protocol is supported by an impossibility result, which we prove, stating that there is no both fully device independent and secure money scheme. Finally, we formulate a quantum analogue of the Oresme-Copernicus-Gresham’s law of economy.

https://arxiv.org/abs/1811.10552

From the article:

A number (in fact, more than 20) of various quantum money schemes has been recently proposed [1, 5, 6, 9–23]. We then ask if the Oresme-Copernicus-Gresham (OCG) Law of economy (known also as the Gresham’s Law [24–29]) will be also applicable to the quantum schemes of money. If so, the Quantum Oresme-Copernicus-Gresham law would have a form:

Bad quantum money drives out good quantum one

[24] Some Notes on the Gresham's Law of Money Circulation

Antonio Moro, Antoon Mor van Dashorst

Antonio Moro, conosciuto anche come Antoon Mor van Dashorst (Utrecht, 1520 – Anversa, tra il 1576 e il 1578), è stato un pittore e ritrattista olandese. Nel 1552 dipinse l'Imperatore Carlo V d'Asburgo, mentre nel 1554 a Londra fece il ritratto della Regina Maria I d'Inghilterra. 

Probabilmente visitò l'Italia nel 1550 dove a Roma imitò alcuni lavori di Tiziano, come la "Danae".

Moro fu inviato dalla Regina Maria dall'Ungheria al Portogallo e tra i ritratti più importanti vi furono quello dell'Infanta Maria, uno della regina Caterina di Portogallo, entrambi conservati nel Museo del Prado, e quello di Re Giovanni III e sua moglie Caterina, conservato a Lisbona. Dopo il suo ritornò a Madrid, dove dipinse il ritratto di Massimiliano di Boemia, fece di nuovo tappa a Roma nel 1552. Alcuni sostengono, ma con prove insufficienti, che uno dei capolavori del Museo del Prado, il ritratto di un ignoto giovane cardinale, da sempre attribuito a Raffaello, potrebbe essere stato dipinto da Moro. Da Roma, si mosse a Genova e infine a Madrid. Nel 1553 fu inviato in Inghilterra, dove ritrasse Maria I di Inghilterra. 

Io conosco questo pittore per via del suo ritratto di Thomas Gresham.

Some Notes on the Gresham's Law of Money Circulation

International Journal of Sciences February 2014 (02)

Amelia Carolina Sparavigna

Polytechnic University of Turin

Abstract

The Gresham’s Law is among the most known laws of economic science. In its popular version, the law is telling that when a government overvalues one type of money and undervalues another, the undervalued money disappears while the overvalued money floods into circulation. Named after Thomas Gresham, a financier of Tudor dynasty, this law was stated by Nicole Oresme and Nicolaus Copernicus. Here we discuss it and follow its long history.

Keywords: Money Circulation, Commodities, Legal Tenders

https://papers.ssrn.com/sol3/papers.cfm?abstract_id=2573697