Controlled gates. Suppose U is a gate that operates on single qubits with matrix representation. The controlled-U gate is a gate that operates on two qubits in such a way that the first qubit serves as a control. I am writing a program where I need to find the eigenstates of an operator that is a Kronecker product of conditional quantum gates.

I am wondering how I would compute this product in matrix form as Nikhil Ayyadevara 31 1 1 bronze badge. Quantum Fourier Transform without SWAPs The Quantum Fourier Transform from Nielsen and Chuang chapter 5 is pictured here: In the textbook the author refers to "swap gates at the end of the circuit which reverse the order of the qubits".

Macalcubo 31 3 3 bronze badges. Blackwidow 5 5 bronze badges. In this case, these operators Jeff 32 4 4 bronze badges. Restoring an initial state after computation Let me first tell my problem statement. Upstart 1 1 silver badge 9 9 bronze badges. So now I'm stuck with Dan Yaron 26 2 2 bronze badges.

The thing that's bugging me is that in the quantum computer implementations I had seen before, the cycle concept is used. Say, for Kelthar 64 4 4 bronze badges.

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Now I need to implement a Sanchayan Dutta 7, 4 4 gold badges 16 16 silver badges 62 62 bronze badges. Now I have to apply the transform I was able to find the answer for CCZ gates, however guessing and testing until I can figure out So is this the correct Grover diffusion operator different gates I have two gates here for the Grover diffusion operator.

The first gate is completely understandable for me, so I implemented it myself after submitting some papers that I read. This is the first Transform matrix into a combination of simple quantum gates I am trying to transform this matrix into a combination of quantum gates but I cannot find any such functionality on Qiskit or anywhere else. I have tried to use Quirk but I do not understand it. Why does a quantum circuit consist of simple quantum gates which act on at most a fixed number of qubits? While reading the Quantum algorithm Wikipedia entry, I noticed that the sentence "A quantum circuit consists of simple quantum gates which act on at most a fixed number of qubits", was annotated with Victory Omole 3 3 silver badges 9 9 bronze badges.

What applications does the quantum gate [ i,1 , 1,i ] have? I've been working through the great introduction to quantum computing on Quantum Country. I thought I want to add the first Nielsen and Chuang's proof for 'approximating arbitrary unitary gates is generically hard' The following statement is found on the page of Nielsen and Chuang's book 10th Anniversary Edition in the proof for the fact that 'approximating arbitrary unitary gates is generically hard' Nan 53 6 6 bronze badges.

Transferring classical OR gate in a quantum gate I would be interested to know how to transform the classic OR gate into a quantum gate. I thought a little about myself. Is there any other implementation? Or is this the minimal in the sense of Defining standard qubit gates for qutrits I am actually working on quantum computing with qutrits.

I am trying to define standard qubit gates for qutrits. Marco Falso 18 4 4 bronze badges. Order of controls and targets of cnx gates in Qiskit Python In the following piece of code: cnx qwc, q[0], q[1],q[2],q[3] in what order control qubits and target qubit are?

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Getting them found? Not so much. And it takes a lot of words. Just so you know, long book!

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I did, too! You think you have a cool idea and then you realize that it needs further explanation. Tangrams and Urclocks, oh my. But Maestra Rising is not just about trying to get home or find a new home , it is also story about trying to do the right thing and having it circle around and bite you on the tush. And it is about being careful what you ask for. Because you might get it. Nivi pulled up a picture of the Urclock from the control room. As it spun slowly in front of them, silence fell. He appeared to find the Urclock unsettling, if his expression were any indication.

I hope you enjoyed the excerpt and will enjoy reading Maestra Rising as much as I enjoyed writing it!

She likes to wander among the genres, rampaging like Godzilla, because she does love peril mixed in her romance. Loves chocolate, bacon, flamingoes, and mid-century modern anything. Can they save a lost ship and find love among the stars? Nivi awakes from cryosleep plagued by guilt. The scientific genius had hoped her people would avoid war if she went into cold sleep, but she learns her sacrifice was in vain.

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Moose survived slavery but never forgot the feeling of worthlessness it forced upon him. After living in the body of a robot for years, he sees an opportunity to help the brilliant Nivi if he becomes human once again. In a new body with new dangers, he worries that the genius scientist will never see him as more than the robot he once was. Maestra Rising is the eighth novel in the epic Project Enterprise sci-fi romance series.

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cszplayers.com/95.php Dom and Arden are two damaged souls who find each other in the darkness. But the Gizzida are putting the final pieces of their endgame into place. The aliens want the Earth and to wipe out the human survivors once and for all. To have any chance at love, life, and survival, Dom and Arden will have to fight harder than ever before. Logan McRae never expected to see two aliens when he woke from cryogenic sleep. He has lost his ship and his people and he questions whether he has lost his mind.

As he gets to know Halor and Kit he realises he might just lose his heart as well. Logan expected to wake on the spacecraft Mercury, ready to pilot the ship down to New Earth. Instead he comes out of cryogenic stasis to find he is on another ship with two alien beings, neither of whom can understand anything he says.