Chinese Physicists Smash Distance Record For Teleportation

The ability to teleport photons through 100 kilometres of free space opens the way for satellite-based quantum communications, say researchers
 

Teleportation is the extraordinary ability to transfer objects from one location to another without travelling through the intervening space.

The idea is not that the physical object is teleported but the information that describes it. This can then be applied to a similar object in a new location which effectively takes on the new identity.

And it is by no means science fiction. Physicists have been teleporting photons since 1997 and the technique is now standard in optics laboratories all over the world.

The phenomenon that makes this possible is known as quantum entanglement,  the deep and mysterious link that occurs when two quantum objects share the same existence and yet are separated in space.

Teleportation turns out to be extremely useful. Because teleported information does not travel through the intervening space, it cannot be secretly accessed by an eavesdropper.

For that reason, teleportation is the enabling technology behind quantum cryptography, a way of sending information with close-to-perfect secrecy.

Unfortunately, entangled photons are fragile objects. They cannot travel further than a kilometre or so down optical fibres because the photons end up interacting with the glass breaking the entanglement. That severely limits quantum cryptography's usefulness.

However, physicists have had more success teleporting photons through the atmosphere. In 2010, a Chinese team announced that it had teleported single photons over a distance of 16 kilometres. Handy but not exactly Earth-shattering.

Now the same team says it has smashed this record. Juan Yin at the University of Science and Technology of China in Shanghai, and a bunch of mates say they have teleported entangled photons over a distance of 97 kilometres across a lake in China.

That's an impressive feat for several reasons. The trick these guys have perfected is to find a way to use a 1.3 Watt laser and some fancy optics to beam the light and receive it.

Inevitably photons get lost and entanglement is destroyed in such a process. Imperfections in the optics and air turbulence account for some of these losses but the biggest problem is beam widening (they did the experiment at an altitude of about 4000 metres). Since the beam spreads out as it travels, many of the photons simply miss the target altogether.

So the most important advance these guys have made is to develop a steering mechanism using a guide laser that keeps the beam precisely on target. As a result, they were able to teleport more than 1100 photons in 4 hours over a distance of 97 kilometres.

That's interesting because it's the same channel attenuation that you'd have to cope with when beaming photons to a satellite with, say, 20 centimetre optics orbiting at about 500 kilometres. "The successful quantum teleportation over such channel losses in combination with our high-frequency and high-accuracy [aiming] technique show the feasibility of satellite-based ultra-long-distance quantum teleportation," say Juan and co.

So these guys clearly have their eye on the possibility of satellite-based quantum cryptography which would provide ultra secure communications around the world. That's in stark contrast to the few kilometres that are possible with commercial quantum cryptography gear.

Of course, data rates are likely to be slow and the rapidly emerging technology of quantum repeaters will extend the reach of ground-based quantum cryptography so that it could reach around the world, in principle at least.

But a perfect, satellite-based security system might be a useful piece of kit to have on the roof of an embassy or distributed among the armed forces.

Something for western security experts to think about.

Ref: arxiv.org/abs/1205.2024: Teleporting Independent Qubits Through A 97 Km Free-Space Channel

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Politics and religion a bad mix !

People who go to places of worship are united in their faith and never for a particular political party or politician.

PRESIDENT Barack Obama has landed himself in a controversy by declaring his support for same-sex marriage. The US President has obviously taken into account the political impact of his move ahead of the US presidential election.

He must have done his maths and worked out the number of votes he could win and lose as a result of his stand. Obama is no angel. He is a politician and his only concern is to get himself re-elected.

Official photographic portrait of US President Barack Obama (born 4 August 1961; assumed office 20 January 2009) (Photo credit: Wikipedia)

Last week, a Gallup Poll Survey showed that 50% of Americans supported gay marriage while 48% opposed it. What Obama hopes to do from his announcement is to win over the younger voters who are more open to this subject. His rival, Republican’s Mitt Romney, has come under attack from the Obama camp for being out of touch with his anti-gay marriage stand.

Obama also believes that blacks will still stick with him even though opposition against gay marriage among black church-goers is the highest among all the racial groups in the US. He retains the black votes and wins extra votes from the white liberals, and he knows he’s into his second term.

But I do not think it is necessary for Obama to invoke his Christian faith as well as Scripture in his defence of gay marriage.

He is not only the first American president to reaffirm same-sex marriage but must also be the first one to quote from the Bible to justify his decision. In this instance, he quoted Matthew 7:12, known as the Golden Rule from Jesus’ Sermon On The Mount.

The Sermon On The Mount is a collection of sayings and teachings of Jesus that emphasises moral teaching in the Gospel of Matthew. The Sermon is the longest piece of teaching from Jesus in the New Testament.

In a nutshell, the Golden Rule states that one should treat others the way one wants to be treated. My Bible states the Golden Rule paragraph as: “Do to others whatever you would like them to do to you. This is the essence of all that is taught in the law and the prophets.”

What Obama has done, like many politicians and their supporters including those in Malaysia, is to read selectively a passage or chapter from a holy book to back their political arguments – political expediency, in other words.

Worse still, some Obama supporters have written about or appeared on TV to point out how some figures in the Bible were polygamists or adulterers while conveniently leaving out the parts that these people eventually repented and found God. They can get away with this because most of us feel inadequate to take on a debate on theology.

Holy books are supposed to be read as a whole, not as a chapter or two, to enable us to have a complete understanding.

Obama, for example, has even implied that the Apostle Paul’s objection to homosexuality in the Bible “is less than transparent” and perhaps even at odds with Jesus. I am not sure if Obama, whose campaign theme is Change, is planning to change the Scripture.

In Malaysia, we are used to reading and hearing PAS leaders – politicians masquerading as theologians – quoting from the Quran to justify their political positions. Umno leaders are often criticised as “pharaohs” from the Age of Ignorance – kejahilan – before the age of Islam.

But now there is a trend among some Malaysian church leaders and Christian-based writers, who support Pakatan Rakyat, to quote from Scripture to justify the need to vote against the government in the coming general election.

This is done during Sunday sermons and via email, and those who are uncomfortable with this religious push are being made to feel guilty or not in sync with the rest of the church. Likewise, nobody wants to listen to a priest or pastor on a Sunday heaping praises on the Barisan Nasional or telling us about the coalition’s transformation plans. We will leave that to the Prime Minister and Datuk Seri Idris Jala.

Politics and religion should not be mixed. People who go to places of worship are united in their faith and never for a particular political party or politician. That’s why we are in a democracy and that’s why we have elections – the right to differ and the right to choose.

The lesson to learn from the Obama controversy is this – the first time around, he was a fresh personality and people around the US wanted change. They were fed up with anything conventional and mainstream. Obama represented hope and ideals.

But the fact is, he is not a Saviour. He is just another self-serving politician who will do anything for self-preservation.

First, it was same-sex civil union. Now it’s same-sex marriage and once that’s legal, same-sex couples would have the constitutional rights to adopt babies from orphanages, and churches will break the law if they reject performing wedding rites for them.

Well, that’s change for you from Obama.

On The Beat  By WONG CHUN WAI\

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Practise 'Addin', a Malaysian way of life? PAS Vows Hudud for Malaysia!

The PAS leader's statement that Islam's status in the Federal Constitution would be changed from official religion' to Addin' if Pakatan Rakyat captures power is the latest example of the party pushing its Islamic agenda without consulting its coalition partners.

PAS president Datuk Seri Abdul Hadi Awang needs a quick lesson in history and the best person to give him that is his colleague and fellow traveller in Pakatan Rakyat DAP national chairman Karpal Singh.

Abdul Hadi had told a press conference in Terengganu last week that the status of Islam in the Federal Constitution would be changed from “official religion” to a “way of life” if Pakatan Rakyat captures power in the next general election.

The unilateral statement was also justified by an attack on the Reid commission, which drafted our constitution in 1956, with Abdul Hadi claiming that there were no Muslim members among its five members, headed by Lord William Reid.

As Karpal Singh has rightly pointed, Hadi was wrong on both scores.

Political analysts and political parties, including the MCA, followed suit in severely criticising Hadi for wanting to unilaterally amend the constitution.

The matter was certainly not brought before the Pakatan Rakyat leaders' council for discussions.

Pakatan leader Datuk Seri Anwar Ibrahim, who advocates a pluralistic approach to religion, was noticeably missing in the controversy because Hadi and PAS, while colleagues in Pakatan Rakyat, have an entirely different approach in that they believe Islam is the only true way to God.

On his part, Hadi has always been pushing for more recognition for Islam and its primacy as the only path to God.

“In the world today, people know of two ways to describe the faith: one is what is adopted by the West by calling it a religion, which denotes the spiritual relationship between human and God, without mentioning it as a way of life,” Hadi was quoted as saying after launching the Terengganu PAS Youth annual meeting in Kampung Kubang Lembek, Manir.

“The second option is by calling it Addin the way of life which is more apt as it includes everything, from the spiritual to all other aspects of life.

“It is not right to say Islam is a religion. The right way is to describe it as Addin, a way of life,” Hadi said.

His interpretation of Islam clashes with the country's multi-ethnic society populated by different races practising different religions.

If an amendment is done it can seriously affect non-Muslims and their way of life which is radically different from that of Muslims.

Although all religions have similarities in moral values and concepts of human justice, their methods and practices differ greatly.

When religion is imposed as a way of life on the majority, the amendment will impact on the rest who practise different faiths and cultures.

It will create many “dos and don'ts” issues like the banning of alcohol, rules on entertainment, dressing and also the intermingling of sexes.

Such amendments will be a recipe for disaster as it can result in the various races drifting further apart and living separate lives instead of coming together into a harmonious, multi-ethnic melting pot.

Hadi also argued that the current definition of Islam as “the official religion of the Federation” did not do justice to Islam and suggested that legislation in this country be interpreted according to the tenets of Islam.

While PAS is under pressure from its Islamic clientele to speak up for Islam, it is also under pressure from its non-Muslim supporters club to desist and behave like PKR or DAP, in wanting to be better than Barisan Nasional at ruling.

Unlike them, PAS is a party that has dreams of creating an Islamic theocracy, something that is unsuitable in this multi-racial society.

This is one reason why PAS is obstinate and unyielding on implementing hudud law and speaking up on many other social issues and the current one to amend the constitution.

PAS' increasingly “superior behaviour”, however, is a by-product of unquestioning support from the DAP.

It shows that neither the DAP nor even the PKR can control PAS any longer and its acquiesce to its demands, like the statement from Hadi that PAS will implement hudud law if elected to Putrajaya.

PAS has a tendency to declare its Islamic agenda without due consultation with its coalition partners and in doing so, it is impinging on non-Muslims' right to freely practise their religion and rights that are guaranteed under the very constitution the party wants to change.

Originally, PAS championed an Islamic theocracy but later following pressure from PKR and especially DAP, it changed to championing a welfare state.

Now the party has come up with its “Addin” or Islam as the way of life proposal, with hudud law included.

The motive is to win the conservative Islamic vote but at the same time, try to satisfy non-Muslim voters.

Comment by BARADAN KUPPUSAMY

Islamic Party Vows Hudud for Malaysia

OnIslam & Newspapers

"If we have enough majority (of seats), if Pas is stronger than our allies, we will implement hudud," Harun said. >>

CAIRO - Seeking to lure more voters in next year’s election, Malaysia's main Islamic party has pledged to amend the constitution to allow the application of hudud in the Asian Muslim-majority country.

"We will implement hudud and amend the Constitution even if (it is) not with the current partners we have in Pakatan...may be there will be other pacts (Pakatan) that will lend us their support,” Harun Taib, chief of PAS Ulema Council, was quoted as saying by the New Straight Times on Saturday, May 12."If we have enough majority (of seats), if PAS is stronger than our allies, we will implement (hudud and the amendment to the Constitution)."

Hudud (Penalties) in Contemporary Legal Discourse

The issue was first raised when the Islamic party’s president Abdul Hadi Awang said that PAS had never backtracked on their intention to put hudud (Islamic penalties) to law and that it will seek to implement it if it takes federal power.

But the staetments drew fire from Karpal Singh, the national chairman of the secular Democratic Action Party (DAP).

Harun reiterated the party support for Hadi on the issue of hudud, saying that the party views Karpal’s criticism as a “personal opinion as a lawyer.”"I think whether it is against the Constitution or not is just his (Karpal's) personal opinion and comment as a lawyer,” Harun said.

"As a PAS member, I am fully behind Hadi."

With an estimated 800,000 members, PAS is the main rival of Prime Minister Najib Razak's United Malays National Organization.

A few years ago, PAS has enacted the hudud laws in Kelantan, to be imposed only on Muslims who represent about 90 per cent of the state's 1.5 million population.

The laws introduced Shari`ah punishments for theft, robbery, adultery, liquor consumption and apostasy.

Adamant

The leader of PAS Ulema council confirmed that hudud can only be implemented through a parliamentary majority."If we have enough majority (of seats), if Pas is stronger than our allies, we will implement (hudud and the amendment to the Constitution)," Harun said.

He added that hudud remains PAS’s intention despite the criticism it received from both its allies in Pakatan and rivals Barisan Nasional.

The Islamic party had already enacted the law in Kelantan and Terengganu but faced constitutional restraint in its implementation.

"We are a party that is championing Islam,” Harun said.

“Of course we will implement what is required by Islam. Pas will always be behind Hadi and the party's struggle to uphold Islam in the government and administration of the country."

Malaysia’s parliamentary elections are due in 2013, but expectations are high that the polls could be called much earlier.

Muslim Malays form about 60 percent of Malaysia's 26-million population, while Christians make up around 9.1 percent.

Buddhists constitute 19.2 percent, Hindu 6.3 while other traditional Chinese religions make up the rest of the population.

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