Quantum Computing Stack Exchange
Quantum Computing Stack Exchange

Questions tagged [pytket]

This tag is for questions relating to pytket, an open source quantum SDK developed by Quantinuum. Given that pytket has many features related to compilation the [compiling] or [transpile] tags may be appropriate to add as well. Questions relating to TKET should also be covered under this tag as the TKET compiler is usually accessed through python via pytket.

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Questions on multi-controlled Toffolis and their implementation in Qiskit

Is it possible to decompose an $n$-controlled Toffoli into $O(n)$ CNOTs without extra working qubits? If so, is such an decomposition currently available in Qiskit or any other (preferably Python and QASM-friendly) packages? If not: Has such an…
mavzolej
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How to define a custom gate from a matrix in TKET

I'm currently learning all about different quantum tools such as qiskit, tket, cirq, Forest SDK and so on. I just want to create a circuit that gets executed given a matrix, because a circuit can be written as a matrix and the other way around. In…
Qubii
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How do I compile a circuit to the native gateset of Quantinuum's trapped-ion devices?

Suppose I have a quantum circuit defined in pytket, qiskit or some other quantum SDK. How do I compile my circuit to be in the native gateset of the Quantinuum trapped ion device/emulators?
Callum
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Does pytket have an optimization pass that removes gate-inverse pairs & identity rotations & redundant gates and/or merges rotations?

For the following sample circuit I want to reduce the number of gates in pytket: for example, I know: Adjacent Rx gates can be merged CZ is self-inverse and cancels itself out because any Hermitian gate is "self-canceling" A zero-angle rotation…
mapper
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Is this possible to reset a single qubit that is part of a larger register in pytket?

I want to reset a single qubit that is part of a larger register. Is this possible in pytket? Resetting the single qubit qc.add_gate(OpType.Reset,q_register[0]) throws TypeError: add_gate(): incompatible function arguments. The following argument…
Qnerd
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Bit ordering moving from qiskit to qulacs through pytket

I have code built in Qiskit that runs and provides the expected output on the Aer simulator. The bit ordering of the output is little-endian based on the order that the classical registers are added to the circuit. My research requires use of Qulacs…
user34741
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Transpiling a circuit with Tket, taking topology into account

There is a simple circuit with one CNOT like the following: Topology 0 → 1 (directed connection) CNOT 1 → 0 Note that CNOT is placed opposite to the connection. If this is transpiled correctly, it should look like the following circuit. HH CNOT 0…
yasuhito
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pytket compiler pass to shorten all angles by multiples of 2 pi

After applying some compiler passes in pytket, I get gates like rx(3.5*pi). Is there a pass that simply shortens the angles by multiples of 2 pi, so that I get rx(1.5*pi) instead?
Phil
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How to specify custom gate set for the optimization in pytket?

I have a specific basis gate set for my system, is it possible to use pytket's predefined optimization sequences and ask it to give a final circuit using my specific gate set?
mondibrah
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How do I apply an arbitrarily-phased single qubit gate in pytket?

This is the specific gate I want to implement using pytket: corresponding Wikipedia page I tried: from pytket import Circuit circ = Circuit(1) circ.U1(angle) But I got the following error: pytket._tket.circuit.Circuit' object has no attribute 'U1'
mapper
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(PyTket) Trouble with RoutingPass.apply() running forever -- seems to hang

I am attempting to route a circuit with 3 qubits, each connected via a 2 qubit gate that is defined using the Unitary2qBox. This sequence is repeated several times. So there are 3 choose 2 gates or 3 gates. When I attempt to route this, the…
Jack Ethridge
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Solving variables in symbolic unitary to get a desired real-valued unitary using qiskit or qympy, qiskit-symb/pytket

I am trying to decompose a 4x4 unitary into 2 qubit circuit using U3 and CNOT gates but the circuit implementation qiskit gives me is not optimized. So I started looking at qiskit-symb and qympy to see if I can design a parameterized circuit and…
AishM
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Pytket's SquashTK1 pass changes symbolic parameters of gates into complicated expressions

For a very simple circuit, such as from pytket.circuit import Circuit, fresh_symbol a = fresh_symbol("a") circ = Circuit(1) circ.X(0) circ.Ry(a,0) the circuit that results from applying a SquashTK1 pass: from pytket import…
Diego Olvera
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How to set different Backend Layouts in TKET and pyQuil (Quil compiler)?

In Qiskit it is possible to describe a CouplingMap on which a circuit get executed. This helps with testing different Layouts. There are many possibilities in Qiskit on how to do this. Firstly you can create a CouplingMapInstance and then create…
Qubii
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