Perfect quantum state mirroring in a chain of N spins is defined as the condition in which the state 丨i 丨of the chain is swapped into the state 丨N - i丨 within a time evolution interval r. Such a phenomenon is an i...Perfect quantum state mirroring in a chain of N spins is defined as the condition in which the state 丨i 丨of the chain is swapped into the state 丨N - i丨 within a time evolution interval r. Such a phenomenon is an interesting way of transfering entanglement. An expressions for the perfect mirroring of a single qubit contained in a spin chain were proposed in the past. We exploit such an expressions for calculating the evolution times in chains of both two and three spins. In the case of a chain of two qubits, we derive conditions under which the associated four Bell states diagonalize the Hamiltonian. It is found that for the two Bell states 丨Ф＋） and 丨Ф-）, perfect mirroring does not occur （i.e. entanglement is not preserved under swapping）. On the other hand, perfect single qubit mirror effect （entanglement preservation） indeed occurs for the other two Bell states 丨ψ＋） and 丨ψ-） which are mapped into 丨Ф＋） and 丨Ф-） respectively. For the case of a chain of three qubits, the effects of a perfect single qubit mirroring on a set of four maximally entangled three qubit states ψl, ψ2, X1, and X2are studied. Due to the fact that quantum mirroring preserves maximal entanglement, the states ψ1 and ψ2 are not altered. However, quantum mirroring changes the states X1 and X2 only if we apply perfect quantum state mirroring in the site a = 1 of the three qubits spin chain. The above constrains the preservation of maximal entanglement under qubit mirroring of such a state. Due to the fact that swapping has already been experimentally tested, a posible, experimental implementations of single qubit mirroring is possible.展开更多
An increasing number of applications and functions are being introduced.into smartphones, but smartphones have limited computation ability and battery resources. To enhance smartphone capacity, cloud computing and vir...An increasing number of applications and functions are being introduced.into smartphones, but smartphones have limited computation ability and battery resources. To enhance smartphone capacity, cloud computing and virtualization techniques can be used to shift the workload from smartphone to computational infrastructure. In this paper, we propose a new framework in which a mirror is kept for each smartphone on a computing infrastructure in the telecom network. With mirrors, the workload can be greatly reduced, and smartphone resources can be virtually expanded. The feasibility of deploying this framework in telecom networks is demonstrated in the protocol design, a synchronization study, and a scalability test. Two applications are introduced to show how computational workload on the smartphone and traffic in the telecom network are signiScantly reduced using our techniques.展开更多
In the eyes of Croatian archaeologist Goran Durdevic,an ancient mirror can also reflect cultural exchanges along the ancient Silk Road.GORAN Durdevic,aged 35,is an archaeolo-gist from Croatia.Since 2013,following the ...In the eyes of Croatian archaeologist Goran Durdevic,an ancient mirror can also reflect cultural exchanges along the ancient Silk Road.GORAN Durdevic,aged 35,is an archaeolo-gist from Croatia.Since 2013,following the launch of the Belt and Road Initiative(BRI),there has been increasing cooperation between Chinese universities and those in B&R member countries.is entailed some Chinese universities expanding enrollment to include international students from those countries.In 2017,Goran,who was in Croatia at the time,saw the news of the enrollment and applied to study at the School of History at Capital Normal University in Beijing,China.During his six-year stay in China,he carried out comparative research on bronze mirrors from the Chinese Han Dynasty(206 BC-AD 220)and ancient Rome.When it comes to the Chinese and Western allusions pertaining to mirrors,Goran can name a list of ancient Chinese philosophies which are inspiring to him.“In the Tang Dynasty(618-907),people believed that by using copper as a mirror,one could check one’s physical appearance;by using people as a mirror,one could understand gains and losses;and by using history as a mirror,one could know the rise and fall of regimes.”展开更多
文摘Perfect quantum state mirroring in a chain of N spins is defined as the condition in which the state 丨i 丨of the chain is swapped into the state 丨N - i丨 within a time evolution interval r. Such a phenomenon is an interesting way of transfering entanglement. An expressions for the perfect mirroring of a single qubit contained in a spin chain were proposed in the past. We exploit such an expressions for calculating the evolution times in chains of both two and three spins. In the case of a chain of two qubits, we derive conditions under which the associated four Bell states diagonalize the Hamiltonian. It is found that for the two Bell states 丨Ф＋） and 丨Ф-）, perfect mirroring does not occur （i.e. entanglement is not preserved under swapping）. On the other hand, perfect single qubit mirror effect （entanglement preservation） indeed occurs for the other two Bell states 丨ψ＋） and 丨ψ-） which are mapped into 丨Ф＋） and 丨Ф-） respectively. For the case of a chain of three qubits, the effects of a perfect single qubit mirroring on a set of four maximally entangled three qubit states ψl, ψ2, X1, and X2are studied. Due to the fact that quantum mirroring preserves maximal entanglement, the states ψ1 and ψ2 are not altered. However, quantum mirroring changes the states X1 and X2 only if we apply perfect quantum state mirroring in the site a = 1 of the three qubits spin chain. The above constrains the preservation of maximal entanglement under qubit mirroring of such a state. Due to the fact that swapping has already been experimentally tested, a posible, experimental implementations of single qubit mirroring is possible.
文摘An increasing number of applications and functions are being introduced.into smartphones, but smartphones have limited computation ability and battery resources. To enhance smartphone capacity, cloud computing and virtualization techniques can be used to shift the workload from smartphone to computational infrastructure. In this paper, we propose a new framework in which a mirror is kept for each smartphone on a computing infrastructure in the telecom network. With mirrors, the workload can be greatly reduced, and smartphone resources can be virtually expanded. The feasibility of deploying this framework in telecom networks is demonstrated in the protocol design, a synchronization study, and a scalability test. Two applications are introduced to show how computational workload on the smartphone and traffic in the telecom network are signiScantly reduced using our techniques.
文摘In the eyes of Croatian archaeologist Goran Durdevic,an ancient mirror can also reflect cultural exchanges along the ancient Silk Road.GORAN Durdevic,aged 35,is an archaeolo-gist from Croatia.Since 2013,following the launch of the Belt and Road Initiative(BRI),there has been increasing cooperation between Chinese universities and those in B&R member countries.is entailed some Chinese universities expanding enrollment to include international students from those countries.In 2017,Goran,who was in Croatia at the time,saw the news of the enrollment and applied to study at the School of History at Capital Normal University in Beijing,China.During his six-year stay in China,he carried out comparative research on bronze mirrors from the Chinese Han Dynasty(206 BC-AD 220)and ancient Rome.When it comes to the Chinese and Western allusions pertaining to mirrors,Goran can name a list of ancient Chinese philosophies which are inspiring to him.“In the Tang Dynasty(618-907),people believed that by using copper as a mirror,one could check one’s physical appearance;by using people as a mirror,one could understand gains and losses;and by using history as a mirror,one could know the rise and fall of regimes.”
