OpenQASM
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| OpenQASM | |
|---|---|
| Stable release | 3.1.0 / May 15, 2024 |
| Implementation language | Python |
| License | Apache License 2.0 |
| Filename extensions | .qasm |
| Website | openqasm |
Open Quantum Assembly Language (OpenQASM; pronounced open kazm)[1] is a programming language designed for describing quantum circuits and algorithms for execution on quantum computers.
Language
[edit]It is designed to be an intermediate representation that can be used by higher-level compilers to communicate with quantum hardware, and allows for the description of a wide range of quantum operations, as well as classical feed-forward flow control based on measurement outcomes.
The language includes a mechanism for describing explicit timing of instructions, and allows for the attachment of low-level definitions to gates for tasks such as calibration.[1] OpenQASM is not intended for general-purpose classical computation, and hardware implementations of the language may not support the full range of data manipulation described in the specification. Compilers for OpenQASM are expected to support a wide range of classical operations for compile-time constants, but the support for these operations on runtime values may vary between implementations.[2]
The language was first described in a paper published in July 2017,[1] and a reference source code implementation was released as part of IBM's Quantum Information Software Kit (Qiskit) for use with their IBM Quantum Experience cloud quantum computing platform.[3] The language has similar qualities to traditional hardware description languages such as Verilog.
OpenQASM defines its version at the head of a source file as a number, as in the declaration:
OPENQASM 3;The level of OpenQASM's original published implementations is OpenQASM 2.0. Version 3.0 of the specification is the current one and can be viewed at the OpenQASM repository on GitHub.[4]
Examples
[edit]The following is an example of OpenQASM source code from the official library. The program adds two four-bit numbers.[5]
/* * quantum ripple-carry adder * Cuccaro et al, quant-ph/0410184 */OPENQASM 3;include "stdgates.inc";gate majority a, b, c { cx c, b; cx c, a; ccx a, b, c;}gate unmaj a, b, c { ccx a, b, c; cx c, a; cx a, b;}qubit[1] cin;qubit[4] a;qubit[4] b;qubit[1] cout;bit[5] ans;uint[4] a_in = 1; // a = 0001uint[4] b_in = 15; // b = 1111// initialize qubitsreset cin;reset a;reset b;reset cout;// set input statesfor i in [0: 3] { if(bool(a_in[i])) x a[i]; if(bool(b_in[i])) x b[i];}// add a to b, storing result in bmajority cin[0], b[0], a[0];for i in [0: 2] { majority a[i], b[i + 1], a[i + 1]; }cx a[3], cout[0];for i in [2: -1: 0] { unmaj a[i], b[i + 1], a[i + 1]; }unmaj cin[0], b[0], a[0];measure b[0:3] -> ans[0:3];measure cout[0] -> ans[4];See also
[edit]References
[edit]- ^ a b c Cross, Andrew W.; Bishop, Lev S.; Smolin, John A.; Gambetta, Jay M. (2017). "Open Quantum Assembly Language". arXiv:1707.03429 [quant-ph].
- ^ "OpenQASM Live Specification". Retrieved 26 December 2022.
- ^ qiskit-openqasm: OpenQASM specification, International Business Machines, 4 July 2017, archived from the original on 10 November 2020, retrieved 6 July 2017
- ^ https://github.com/openqasm/openqasm OpenQASM
- ^ "openqasm/adder.qasm at master · openqasm/openqasm · GitHub". GitHub. 29 January 2022.
External links
[edit]| General | |||||||||
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| Quantum communication |
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| Quantum programming | |||||||||
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| OpenQASM | |
|---|---|
| Stable release | 3.1.0 / May 15, 2024 |
| Implementation language | Python |
| License | Apache License 2.0 |
| Filename extensions | .qasm |
| Website | openqasm.com |
Open Quantum Assembly Language (OpenQASM; pronounced open kazm)[1] is a programming language designed for describing quantum circuits and algorithms for execution on quantum computers.
Language
It is designed to be an intermediate representation that can be used by higher-level compilers to communicate with quantum hardware, and allows for the description of a wide range of quantum operations, as well as classical feed-forward flow control based on measurement outcomes.
The language includes a mechanism for describing explicit timing of instructions, and allows for the attachment of low-level definitions to gates for tasks such as calibration.[1] OpenQASM is not intended for general-purpose classical computation, and hardware implementations of the language may not support the full range of data manipulation described in the specification. Compilers for OpenQASM are expected to support a wide range of classical operations for compile-time constants, but the support for these operations on runtime values may vary between implementations.[2]
The language was first described in a paper published in July 2017,[1] and a reference source code implementation was released as part of IBM's Quantum Information Software Kit (Qiskit) for use with their IBM Quantum Experience cloud quantum computing platform.[3] The language has similar qualities to traditional hardware description languages such as Verilog.
OpenQASM defines its version at the head of a source file as a number, as in the declaration:
OPENQASM 3;The level of OpenQASM's original published implementations is OpenQASM 2.0. Version 3.0 of the specification is the current one and can be viewed at the OpenQASM repository on GitHub.[4]
Examples
The following is an example of OpenQASM source code from the official library. The program adds two four-bit numbers.[5]
/* * quantum ripple-carry adder * Cuccaro et al, quant-ph/0410184 */OPENQASM 3;include "stdgates.inc";gate majority a, b, c { cx c, b; cx c, a; ccx a, b, c;}gate unmaj a, b, c { ccx a, b, c; cx c, a; cx a, b;}qubit[1] cin;qubit[4] a;qubit[4] b;qubit[1] cout;bit[5] ans;uint[4] a_in = 1; // a = 0001uint[4] b_in = 15; // b = 1111// initialize qubitsreset cin;reset a;reset b;reset cout;// set input statesfor i in [0: 3] { if(bool(a_in[i])) x a[i]; if(bool(b_in[i])) x b[i];}// add a to b, storing result in bmajority cin[0], b[0], a[0];for i in [0: 2] { majority a[i], b[i + 1], a[i + 1]; }cx a[3], cout[0];for i in [2: -1: 0] { unmaj a[i], b[i + 1], a[i + 1]; }unmaj cin[0], b[0], a[0];measure b[0:3] -> ans[0:3];measure cout[0] -> ans[4];See also
References
- ^ a b c Cross, Andrew W.; Bishop, Lev S.; Smolin, John A.; Gambetta, Jay M. (2017). "Open Quantum Assembly Language". arXiv:1707.03429 [quant-ph].
- ^ "OpenQASM Live Specification". Retrieved 26 December 2022.
- ^ qiskit-openqasm: OpenQASM specification, International Business Machines, 4 July 2017, archived from the original on 10 November 2020, retrieved 6 July 2017
- ^ https://github.com/openqasm/openqasm OpenQASM
- ^ "openqasm/adder.qasm at master · openqasm/openqasm · GitHub". GitHub. 29 January 2022.
External links
- Official website
- openqasm on GitHub
| General | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Theorems | |||||||||
| Quantum communication |
| ||||||||
| Quantum algorithms | |||||||||
| Quantum complexity theory | |||||||||
| Quantum processor benchmarks | |||||||||
| Quantum computing models | |||||||||
| Quantum error correction | |||||||||
| Physical implementations |
| ||||||||
| Quantum programming | |||||||||
| History | |||||
|---|---|---|---|---|---|
| Products | |||||
| Business entities |
| ||||
| Facilities |
| ||||
| Initiatives | |||||
| Inventions | |||||
| Terminology | |||||
| CEOs |
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| Other | |||||
