超级军网西门菲莎大学刷新量子储存纪録qubits 室温下39分钟
来源：百度文库 编辑：超级军网 时间：2024/05/02 06:22:24
西门菲莎大学刷新量子储存纪録 室温下39分钟
加拿大卑诗省西门菲莎大学Mike Thewalt帯领的一支团队成功将量子记忆迭加状熊(qubits)在室温下保持39分钟，几乎是以往的100倍，以前的纪録是25秒。
Scientists break record for quantum memory storage
November 15, 2013
The prospect of quantum computers has moved a step closer after engineering research conducted by an international team of scientists smashed the record for holding the required memory state in a stable environment.
According to Science Daily, the fragile nature of the potentially ultrafast computing technology has often meant that storage of the quantum data - known as qubits - is subject to a limited survival time, with the computer engineering resource normally only available for a few seconds.
New world record
However, a team led by professor Mike Thewalt of Canada's Simon Fraser University, has blitzed past an unofficial world record of 25 seconds, with the scientists able to keep the quantum memory stable for an unprecedented 39 minutes at room temperature. At the same time, they subjected the qubits to a series of temperature changes, going to so far as to cryogenically freeze them and recording a coherent memory time of three hours.
Naturally, this has re-opened the debate as to whether or not the overcoming of a fairly significant barrier in quantum computing - in other words maintaining the memory of data itself - is the first step on the road to creating devices that can make multiple calculations simultaneously. The research, which was published in the journal Science, is believed to be groundbreaking, with scientists involved in the project confident that it provides a potential path for long-term quantum storage.
"39 minutes may not seem very long but as it only takes one-hundred-thousandth of a second to flip the nuclear spin of a phosphorus ion - the type of operation used to run quantum calculations - in theory over 2 million operations could be applied in the time it takes for the superposition to naturally decay by one percent," said Stephanie Simmons, a member of Oxford University's Department of Materials and a co-author on the research paper. "Having such robust, as well as long-lived, qubits could prove very helpful for anyone trying to build a quantum computer."
Maintaining stability
However, according to the BBC, a number of challenges still remain, not least of which is the need to repeat these levels of quantum stability on a regular basis. The problem with qubits has always been that they lose memory in less than a second - a considerable drawback when it comes to making computing calculations. And while the experiment used purified silicon as its control mechanism, a successful quantum calculation would need different qubits placed in different states to see how they interact.
"These lifetimes are at least ten times longer than those measured in previous experiments," said Simmons. 'We've managed to identify a system that seems to have basically no noise. They're high-performance qubits."
Understandably, the results have since gained mileage within the scientific community. According to the news source, the fact that the team were also able to control the qubits at varying temperatures - including that of absolute zero - was an "exciting breakthrough that has long been predicted," with the man who previously held the unofficial record for a solid state quantum system adding his congratulations.
"It's remarkable that these coherence states could be held for so long in a measurable system - as measurement normally introduces noise," said doctor Thaddeus Ladd, formerly of Stanford University's Quantum Information Science unit, now working for HRL Laboratories. "It's also a nice surprise that nothing goes wrong warming up and cooling the sample again - from an experimental point of view that's pretty remarkable. What is perhaps most important is that this is silicon. The global investment in this particular material means that it has a lot of potential for engineering."
http://why.knovel.com/all-engine ... memory-storage.html
.
西门菲莎大学刷新量子储存纪録 室温下39分钟
加拿大卑诗省西门菲莎大学Mike Thewalt帯领的一支团队成功将量子记忆迭加状熊(qubits)在室温下保持39分钟，几乎是以往的100倍，以前的纪録是25秒。
Scientists break record for quantum memory storage
November 15, 2013
The prospect of quantum computers has moved a step closer after engineering research conducted by an international team of scientists smashed the record for holding the required memory state in a stable environment.
According to Science Daily, the fragile nature of the potentially ultrafast computing technology has often meant that storage of the quantum data - known as qubits - is subject to a limited survival time, with the computer engineering resource normally only available for a few seconds.
New world record
However, a team led by professor Mike Thewalt of Canada's Simon Fraser University, has blitzed past an unofficial world record of 25 seconds, with the scientists able to keep the quantum memory stable for an unprecedented 39 minutes at room temperature. At the same time, they subjected the qubits to a series of temperature changes, going to so far as to cryogenically freeze them and recording a coherent memory time of three hours.
Naturally, this has re-opened the debate as to whether or not the overcoming of a fairly significant barrier in quantum computing - in other words maintaining the memory of data itself - is the first step on the road to creating devices that can make multiple calculations simultaneously. The research, which was published in the journal Science, is believed to be groundbreaking, with scientists involved in the project confident that it provides a potential path for long-term quantum storage.
"39 minutes may not seem very long but as it only takes one-hundred-thousandth of a second to flip the nuclear spin of a phosphorus ion - the type of operation used to run quantum calculations - in theory over 2 million operations could be applied in the time it takes for the superposition to naturally decay by one percent," said Stephanie Simmons, a member of Oxford University's Department of Materials and a co-author on the research paper. "Having such robust, as well as long-lived, qubits could prove very helpful for anyone trying to build a quantum computer."
Maintaining stability
However, according to the BBC, a number of challenges still remain, not least of which is the need to repeat these levels of quantum stability on a regular basis. The problem with qubits has always been that they lose memory in less than a second - a considerable drawback when it comes to making computing calculations. And while the experiment used purified silicon as its control mechanism, a successful quantum calculation would need different qubits placed in different states to see how they interact.
"These lifetimes are at least ten times longer than those measured in previous experiments," said Simmons. 'We've managed to identify a system that seems to have basically no noise. They're high-performance qubits."
Understandably, the results have since gained mileage within the scientific community. According to the news source, the fact that the team were also able to control the qubits at varying temperatures - including that of absolute zero - was an "exciting breakthrough that has long been predicted," with the man who previously held the unofficial record for a solid state quantum system adding his congratulations.
"It's remarkable that these coherence states could be held for so long in a measurable system - as measurement normally introduces noise," said doctor Thaddeus Ladd, formerly of Stanford University's Quantum Information Science unit, now working for HRL Laboratories. "It's also a nice surprise that nothing goes wrong warming up and cooling the sample again - from an experimental point of view that's pretty remarkable. What is perhaps most important is that this is silicon. The global investment in this particular material means that it has a lot of potential for engineering."
http://why.knovel.com/all-engine ... memory-storage.html
.
加拿大卑诗省西门菲莎大学Mike Thewalt帯领的一支团队成功将量子记忆迭加状熊(qubits)在室温下保持39分钟，几乎是以往的100倍，以前的纪録是25秒。
Scientists break record for quantum memory storage
November 15, 2013
The prospect of quantum computers has moved a step closer after engineering research conducted by an international team of scientists smashed the record for holding the required memory state in a stable environment.
According to Science Daily, the fragile nature of the potentially ultrafast computing technology has often meant that storage of the quantum data - known as qubits - is subject to a limited survival time, with the computer engineering resource normally only available for a few seconds.
New world record
However, a team led by professor Mike Thewalt of Canada's Simon Fraser University, has blitzed past an unofficial world record of 25 seconds, with the scientists able to keep the quantum memory stable for an unprecedented 39 minutes at room temperature. At the same time, they subjected the qubits to a series of temperature changes, going to so far as to cryogenically freeze them and recording a coherent memory time of three hours.
Naturally, this has re-opened the debate as to whether or not the overcoming of a fairly significant barrier in quantum computing - in other words maintaining the memory of data itself - is the first step on the road to creating devices that can make multiple calculations simultaneously. The research, which was published in the journal Science, is believed to be groundbreaking, with scientists involved in the project confident that it provides a potential path for long-term quantum storage.
"39 minutes may not seem very long but as it only takes one-hundred-thousandth of a second to flip the nuclear spin of a phosphorus ion - the type of operation used to run quantum calculations - in theory over 2 million operations could be applied in the time it takes for the superposition to naturally decay by one percent," said Stephanie Simmons, a member of Oxford University's Department of Materials and a co-author on the research paper. "Having such robust, as well as long-lived, qubits could prove very helpful for anyone trying to build a quantum computer."
Maintaining stability
However, according to the BBC, a number of challenges still remain, not least of which is the need to repeat these levels of quantum stability on a regular basis. The problem with qubits has always been that they lose memory in less than a second - a considerable drawback when it comes to making computing calculations. And while the experiment used purified silicon as its control mechanism, a successful quantum calculation would need different qubits placed in different states to see how they interact.
"These lifetimes are at least ten times longer than those measured in previous experiments," said Simmons. 'We've managed to identify a system that seems to have basically no noise. They're high-performance qubits."
Understandably, the results have since gained mileage within the scientific community. According to the news source, the fact that the team were also able to control the qubits at varying temperatures - including that of absolute zero - was an "exciting breakthrough that has long been predicted," with the man who previously held the unofficial record for a solid state quantum system adding his congratulations.
"It's remarkable that these coherence states could be held for so long in a measurable system - as measurement normally introduces noise," said doctor Thaddeus Ladd, formerly of Stanford University's Quantum Information Science unit, now working for HRL Laboratories. "It's also a nice surprise that nothing goes wrong warming up and cooling the sample again - from an experimental point of view that's pretty remarkable. What is perhaps most important is that this is silicon. The global investment in this particular material means that it has a lot of potential for engineering."
http://why.knovel.com/all-engine ... memory-storage.html
.
西门菲莎大学刷新量子储存纪録 室温下39分钟
加拿大卑诗省西门菲莎大学Mike Thewalt帯领的一支团队成功将量子记忆迭加状熊(qubits)在室温下保持39分钟，几乎是以往的100倍，以前的纪録是25秒。
Scientists break record for quantum memory storage
November 15, 2013
The prospect of quantum computers has moved a step closer after engineering research conducted by an international team of scientists smashed the record for holding the required memory state in a stable environment.
According to Science Daily, the fragile nature of the potentially ultrafast computing technology has often meant that storage of the quantum data - known as qubits - is subject to a limited survival time, with the computer engineering resource normally only available for a few seconds.
New world record
However, a team led by professor Mike Thewalt of Canada's Simon Fraser University, has blitzed past an unofficial world record of 25 seconds, with the scientists able to keep the quantum memory stable for an unprecedented 39 minutes at room temperature. At the same time, they subjected the qubits to a series of temperature changes, going to so far as to cryogenically freeze them and recording a coherent memory time of three hours.
Naturally, this has re-opened the debate as to whether or not the overcoming of a fairly significant barrier in quantum computing - in other words maintaining the memory of data itself - is the first step on the road to creating devices that can make multiple calculations simultaneously. The research, which was published in the journal Science, is believed to be groundbreaking, with scientists involved in the project confident that it provides a potential path for long-term quantum storage.
"39 minutes may not seem very long but as it only takes one-hundred-thousandth of a second to flip the nuclear spin of a phosphorus ion - the type of operation used to run quantum calculations - in theory over 2 million operations could be applied in the time it takes for the superposition to naturally decay by one percent," said Stephanie Simmons, a member of Oxford University's Department of Materials and a co-author on the research paper. "Having such robust, as well as long-lived, qubits could prove very helpful for anyone trying to build a quantum computer."
Maintaining stability
However, according to the BBC, a number of challenges still remain, not least of which is the need to repeat these levels of quantum stability on a regular basis. The problem with qubits has always been that they lose memory in less than a second - a considerable drawback when it comes to making computing calculations. And while the experiment used purified silicon as its control mechanism, a successful quantum calculation would need different qubits placed in different states to see how they interact.
"These lifetimes are at least ten times longer than those measured in previous experiments," said Simmons. 'We've managed to identify a system that seems to have basically no noise. They're high-performance qubits."
Understandably, the results have since gained mileage within the scientific community. According to the news source, the fact that the team were also able to control the qubits at varying temperatures - including that of absolute zero - was an "exciting breakthrough that has long been predicted," with the man who previously held the unofficial record for a solid state quantum system adding his congratulations.
"It's remarkable that these coherence states could be held for so long in a measurable system - as measurement normally introduces noise," said doctor Thaddeus Ladd, formerly of Stanford University's Quantum Information Science unit, now working for HRL Laboratories. "It's also a nice surprise that nothing goes wrong warming up and cooling the sample again - from an experimental point of view that's pretty remarkable. What is perhaps most important is that this is silicon. The global investment in this particular material means that it has a lot of potential for engineering."
http://why.knovel.com/all-engine ... memory-storage.html
.