Scientists achieve teleportation breakthrough

Japanese researchers carry out quantum teleportation within a diamond.

Scientists figure out how to teleport information within a diamond.
The study took advantage of defects in the diamond’s structure.
The achievement has implications for quantum computing.

Scientists from the Yokohama National University in Japan achieved the feat of teleporting quantum information within a diamond. Their study is an important step in the field of quantum information technology.

Hideo Kosaka, a professor of engineering at Yokohama National University, led the study. He explained that the goal was to get data where it doesn’t normally go

“Quantum teleportation permits the transfer of quantum information into an otherwise inaccessible space,” shared Kosaka. “It also permits the transfer of information into a quantum memory without revealing or destroying the stored quantum information.”

The “inaccessible space” explored in the study was the lattice of carbon atoms in a diamond. The strength of the structure stems from the diamond’s organization that has six protons and six neutrons in the nucleus, with six spinning electrons around it. As they bond to the diamond, the atoms form a super-strong lattice.

For their experiments, Kosaka and his team focused on defects that sometimes arise in diamonds, when a nitrogen atom appears in vacancies that would ordinarily house carbon atoms.

Kosaka’s team manipulated an electron and a carbon isotope in such a vacancy by running a microwave and a radio wave into the diamond via a very thin wire – one fourth the width of a human hair. The wire was attached to the diamond, creating an oscillating magnetic field.

The scientists controlled the microwaves sent to the diamond to transfer information within it. In particular, they employed a nitrogen nano magnet to transfer the polarization state of a photon to a carbon atom, effectively achieving teleportation.

The diamond’s lattice structure features a nitrogen-vacancy center with surrounding carbons. In this image, the carbon isotope (green) is initially entangled with an electron (blue) in the vacancy. It then waits for a photon (red) to be absorbed. This results in quantum teleportation-based state transfer of the photon into the carbon memory.

“The success of the photon storage in the other node establishes the entanglement between two adjacent nodes,” Kosaka said, adding that their “ultimate goal” was to figure out how to make use of such processes “for large-scale quantum computation and metrology.”

The accomplishment could prove vital in the quest for new ways to store and share sensitive information, with previous studies showing diamonds could house giant amounts of encrypted data.

Kosaka’s team also included Kazuya Tsurumoto, Ryota Kuroiwa, Hiroki Kano, and Yuhei Sekiguchi.

You can find their study published in Communications Physics.

Source: DCLA

Scientists achieve teleportation breakthrough

Japanese researchers carry out quantum teleportation within a diamond.

Scientists figure out how to teleport information within a diamond.
The study took advantage of defects in the diamond’s structure.
The achievement has implications for quantum computing.

Scientists from the Yokohama National University in Japan achieved the feat of teleporting quantum information within a diamond. Their study is an important step in the field of quantum information technology.

Hideo Kosaka, a professor of engineering at Yokohama National University, led the study. He explained that the goal was to get data where it doesn’t normally go

“Quantum teleportation permits the transfer of quantum information into an otherwise inaccessible space,” shared Kosaka. “It also permits the transfer of information into a quantum memory without revealing or destroying the stored quantum information.”

The “inaccessible space” explored in the study was the lattice of carbon atoms in a diamond. The strength of the structure stems from the diamond’s organization that has six protons and six neutrons in the nucleus, with six spinning electrons around it. As they bond to the diamond, the atoms form a super-strong lattice.

For their experiments, Kosaka and his team focused on defects that sometimes arise in diamonds, when a nitrogen atom appears in vacancies that would ordinarily house carbon atoms.

Kosaka’s team manipulated an electron and a carbon isotope in such a vacancy by running a microwave and a radio wave into the diamond via a very thin wire – one fourth the width of a human hair. The wire was attached to the diamond, creating an oscillating magnetic field.

The scientists controlled the microwaves sent to the diamond to transfer information within it. In particular, they employed a nitrogen nano magnet to transfer the polarization state of a photon to a carbon atom, effectively achieving teleportation.

The diamond’s lattice structure features a nitrogen-vacancy center with surrounding carbons. In this image, the carbon isotope (green) is initially entangled with an electron (blue) in the vacancy. It then waits for a photon (red) to be absorbed. This results in quantum teleportation-based state transfer of the photon into the carbon memory.

“The success of the photon storage in the other node establishes the entanglement between two adjacent nodes,” Kosaka said, adding that their “ultimate goal” was to figure out how to make use of such processes “for large-scale quantum computation and metrology.”

The accomplishment could prove vital in the quest for new ways to store and share sensitive information, with previous studies showing diamonds could house giant amounts of encrypted data.

Kosaka’s team also included Kazuya Tsurumoto, Ryota Kuroiwa, Hiroki Kano, and Yuhei Sekiguchi.

You can find their study published in Communications Physics.

Source: DCLA

Frenchman jailed for five years in Brussels diamond heist

A Frenchman was sentenced Thursday in Belgium to five years in prison for his role in a spectacular $50 million diamond heist at Brussels airport in 2013.

Smiling, Marc Bertoldi, 48, replied “thanks, goodbye” after the presiding judge told him he had one month to appeal his jail sentence and a 6,000 euros ($6,800) fine.

The February 18, 2013 robbery, one of the world’s biggest diamond thefts, saw a gang of armed men posing as police seize the gems from a passenger plane in an operation that lasted barely six minutes without a shot being fired.

The hooded men, armed with machine guns, pulled up in a car on the runway at Brussels’ main Zaventem airport where an armoured vehicle had just unloaded diamonds onto a plane about to take off for Zurich.

The men forced open the hold and removed about 120 boxes of diamonds before making off with the haul of about $50 million dollars (worth 37 million euros at the time) in gems, most of which were never recovered.

Some gold and precious metal in powder form were also stolen.

More than 30 people were detained in Belgium, France and Switzerland in massive coordinated police operations.

Last month, Bertoldi denied he had taken part in what the Belgian media called “the heist of the century,” telling the court he had only received some of the stolen diamonds.

But the presiding judge, reading the sentence on Thursday, said Bertoldi, an athletic man who wore jeans and a dark shirt, had in fact been “an indispensable cog” in the theft.

The judge said Bertoldi nonetheless “did not personally participate in all the offences committed,” particularly the theft of cars that were later set on fire.

– ‘Not the mastermind’ –

Bertoldi’s lawyer Dimitri de Beco told AFP: “It’s clear. He is not the mastermind of the robbery. That gives us some satisfaction.”

In addition to European cities, the investigation was also carried out in Casablanca, Morocco, where Bertoldi lived in 2012 and 2013.

The probe showed the many telephone contacts Bertoldi, who was arrested in France in May 2013, had before the heist with the presumed mastermind, Houssein Bajjadi of Brussels.

Bajjadi and the 17 other accused identified by Belgian authorities are due to be retried at the end of 2019 or early 2020 after the prosecution appealed their acquittal last year.

Before the airport heist, Belgium had experienced several spectacular robberies involving diamonds and precious gems.

In February 2003, jewellery and diamonds valued at about 100 million euros were stolen from an Antwerp diamond exchange.

More than 120 safes in the port city’s Diamond Center, a heavily protected building in the heart of the diamond district, were emptied unnoticed.

In 2013, a gang of hooded men pulled off one of the world’s biggest diamond thefts at Brussels’ main Zaventem airport.

Source: DCLA

Frenchman jailed for five years in Brussels diamond heist

A Frenchman was sentenced Thursday in Belgium to five years in prison for his role in a spectacular $50 million diamond heist at Brussels airport in 2013.

Smiling, Marc Bertoldi, 48, replied “thanks, goodbye” after the presiding judge told him he had one month to appeal his jail sentence and a 6,000 euros ($6,800) fine.

The February 18, 2013 robbery, one of the world’s biggest diamond thefts, saw a gang of armed men posing as police seize the gems from a passenger plane in an operation that lasted barely six minutes without a shot being fired.

The hooded men, armed with machine guns, pulled up in a car on the runway at Brussels’ main Zaventem airport where an armoured vehicle had just unloaded diamonds onto a plane about to take off for Zurich.

The men forced open the hold and removed about 120 boxes of diamonds before making off with the haul of about $50 million dollars (worth 37 million euros at the time) in gems, most of which were never recovered.

Some gold and precious metal in powder form were also stolen.

More than 30 people were detained in Belgium, France and Switzerland in massive coordinated police operations.

Last month, Bertoldi denied he had taken part in what the Belgian media called “the heist of the century,” telling the court he had only received some of the stolen diamonds.

But the presiding judge, reading the sentence on Thursday, said Bertoldi, an athletic man who wore jeans and a dark shirt, had in fact been “an indispensable cog” in the theft.

The judge said Bertoldi nonetheless “did not personally participate in all the offences committed,” particularly the theft of cars that were later set on fire.

– ‘Not the mastermind’ –

Bertoldi’s lawyer Dimitri de Beco told AFP: “It’s clear. He is not the mastermind of the robbery. That gives us some satisfaction.”

In addition to European cities, the investigation was also carried out in Casablanca, Morocco, where Bertoldi lived in 2012 and 2013.

The probe showed the many telephone contacts Bertoldi, who was arrested in France in May 2013, had before the heist with the presumed mastermind, Houssein Bajjadi of Brussels.

Bajjadi and the 17 other accused identified by Belgian authorities are due to be retried at the end of 2019 or early 2020 after the prosecution appealed their acquittal last year.

Before the airport heist, Belgium had experienced several spectacular robberies involving diamonds and precious gems.

In February 2003, jewellery and diamonds valued at about 100 million euros were stolen from an Antwerp diamond exchange.

More than 120 safes in the port city’s Diamond Center, a heavily protected building in the heart of the diamond district, were emptied unnoticed.

In 2013, a gang of hooded men pulled off one of the world’s biggest diamond thefts at Brussels’ main Zaventem airport.

Source: DCLA

Tara Jewels Files for Chapter 11

Tara Jewels LLC and parent company Tara Jewels Holdings have filed for bankruptcy, each listing between $10 million and $50 million in outstanding liabilities.

Wholesaler Tara Jewels LLC currently claims to have between $500,000 and $1 million in assets, according to the June 21 Chapter 11 filing in the Southern District of New York. The parent company reported up to $50,000 in assets. Both firms are owned by the India-headquartered Tara Jewels Ltd, which has a chain of retail stores in its home country.

The supplier, which focuses on loose diamonds, gemstones and branded jewelry, began its wholesale operation in 2006, when it partnered with M. Fabrikant & Sons. Shortly thereafter, the company, renamed as Fabrikant-Tara, filed for protection in a US bankruptcy court. It also sought protection in 2008, according to the filings.

In November 2018, a Mumbai court initiated insolvency proceedings against Tara Jewels Ltd on behalf of creditors.

Tara’s customers include Zale Corp, Walmart, J.C. Penney, Sterling Jewelers and Signet, its website notes. It has also co-branded a bridal and fashion jewelry line with fashion designer Zac Posen. In 2012, the company received an investment from Swarovski subsidiary Crystalon Finanz.

Tara Jewels is the second notable jewelry company to enter bankruptcy proceedings in New York this week. Enchanted Diamonds filed for Chapter 7 liquidation in the same court on June 20, claiming liabilities of $1.7 million.

Source: diamonds.net

Tara Jewels Files for Chapter 11

Tara Jewels LLC and parent company Tara Jewels Holdings have filed for bankruptcy, each listing between $10 million and $50 million in outstanding liabilities.

Wholesaler Tara Jewels LLC currently claims to have between $500,000 and $1 million in assets, according to the June 21 Chapter 11 filing in the Southern District of New York. The parent company reported up to $50,000 in assets. Both firms are owned by the India-headquartered Tara Jewels Ltd, which has a chain of retail stores in its home country.

The supplier, which focuses on loose diamonds, gemstones and branded jewelry, began its wholesale operation in 2006, when it partnered with M. Fabrikant & Sons. Shortly thereafter, the company, renamed as Fabrikant-Tara, filed for protection in a US bankruptcy court. It also sought protection in 2008, according to the filings.

In November 2018, a Mumbai court initiated insolvency proceedings against Tara Jewels Ltd on behalf of creditors.

Tara’s customers include Zale Corp, Walmart, J.C. Penney, Sterling Jewelers and Signet, its website notes. It has also co-branded a bridal and fashion jewelry line with fashion designer Zac Posen. In 2012, the company received an investment from Swarovski subsidiary Crystalon Finanz.

Tara Jewels is the second notable jewelry company to enter bankruptcy proceedings in New York this week. Enchanted Diamonds filed for Chapter 7 liquidation in the same court on June 20, claiming liabilities of $1.7 million.

Source: diamonds.net

Gem Diamonds Unearths 135ct. Yellow

Gem Diamonds has recovered a 135 carat yellow at its Letšeng mine in Lesotho, the third significant colored-diamond discovery at the deposit this year.

The company retrieved the high quality, type I stone on June 21, three months after the mine yielded a similar quality yellow diamond weighing 134 carats. Those discoveries follow a two year gap in the recovery of yellow diamonds weighing more than 100 carats from Letšeng. In June 2017, the miner found a 151.52 carat yellow.

Source: DCLA