The Learnability of Quantum States
... Now, how many times will we need to repeat this adaptive procedure before, given E1 , . . . , Er drawn as above, we can estimate (with high probability) the conditional probability that f (z1 , . . . , zr ) = 1? If we simply apply Theorem 1.1 to the tensor product of all r registers, then it is eas ...
... Now, how many times will we need to repeat this adaptive procedure before, given E1 , . . . , Er drawn as above, we can estimate (with high probability) the conditional probability that f (z1 , . . . , zr ) = 1? If we simply apply Theorem 1.1 to the tensor product of all r registers, then it is eas ...
Spintronics and Quantum Dots for Quantum Computing and
... our quantum computer proposal. There is some relation between the two if there are strong spin-orbit effects, but our intention is that conditions and materials should be chosen such that these effects are weak. Under these circumstances the spin coherence times (the time over which the phase of a s ...
... our quantum computer proposal. There is some relation between the two if there are strong spin-orbit effects, but our intention is that conditions and materials should be chosen such that these effects are weak. Under these circumstances the spin coherence times (the time over which the phase of a s ...
MULTIPARTICLE ENTANGLEMENT Sebastian Hartweg, Mario Berta (QSIT Seminar, 10.12.2012)
... operators). The operator in the middle pair of parentheses represents a global entangling interaction that is diagonal in the measurement basis spanned by all product states of N qubits, each in either j " l or j # l, and can be implemented by generalizing the phase-gate mechanism described in ref. ...
... operators). The operator in the middle pair of parentheses represents a global entangling interaction that is diagonal in the measurement basis spanned by all product states of N qubits, each in either j " l or j # l, and can be implemented by generalizing the phase-gate mechanism described in ref. ...
INTRODUCTION TO QUANTUM CHAOS
... Before modern computers made it possible to perform extensive numerical simulations, the class of problems physicists or mathematicians could effectively solve were either integrable or sufficiently near integrability that a perturbative scheme could be applied. This class included both the “two-bod ...
... Before modern computers made it possible to perform extensive numerical simulations, the class of problems physicists or mathematicians could effectively solve were either integrable or sufficiently near integrability that a perturbative scheme could be applied. This class included both the “two-bod ...
Compatibility in Multiparameter Quantum Metrology
... In the above discussion we have not specified whether the channel considered acts on a single quantum probe or represents N channels acting on N possibly entangled quantum systems and yielding the output state ⊗N N ρN ϕ = Λϕ (ρ ). This last model is commonly considered in quantum metrology when inves ...
... In the above discussion we have not specified whether the channel considered acts on a single quantum probe or represents N channels acting on N possibly entangled quantum systems and yielding the output state ⊗N N ρN ϕ = Λϕ (ρ ). This last model is commonly considered in quantum metrology when inves ...
Direct characterization of quantum dynamics
... nature of a quantum process, without ever revealing the state of the system. In general, however, it is unclear if there is a fundamental relationship between QED and QPT, namely whether it is possible to completely characterize the quantum dynamics of arbitrary quantum systems using QED. And, provi ...
... nature of a quantum process, without ever revealing the state of the system. In general, however, it is unclear if there is a fundamental relationship between QED and QPT, namely whether it is possible to completely characterize the quantum dynamics of arbitrary quantum systems using QED. And, provi ...
How Quantum Computers Fail - Einstein Institute of Mathematics
... based on the individual qubits.) In contrast, we can regard the subspace of bosonic states as a quantum code, and the type of noise we expect amounts to having a mixed state between the intended bosonic state and other bosonic states. Such a noise does not exhibit a strong dependence on the computa ...
... based on the individual qubits.) In contrast, we can regard the subspace of bosonic states as a quantum code, and the type of noise we expect amounts to having a mixed state between the intended bosonic state and other bosonic states. Such a noise does not exhibit a strong dependence on the computa ...
Uncertainty Principle Tutorial part II
... eigenstate of the operator B̂ . Thus, we can prove that any eigenstate of the operator B̂ must also be an eigenstate of  if their eigenvalue spectra are non-degenerate. Therefore, the complete set of eigenstates ...
... eigenstate of the operator B̂ . Thus, we can prove that any eigenstate of the operator B̂ must also be an eigenstate of  if their eigenvalue spectra are non-degenerate. Therefore, the complete set of eigenstates ...
